Custom decentralized solutions across Ethereum, Solana, Arbitrum and 6 more chains. Built for enterprise teams scaling DeFi protocols, FinTech platforms and regulated on-chain products. Security-first engineering with audited smart contracts since 2017, backed by a 100 percent audit first-pass rate.
Smart contract audit and verification from 32,000 USD typical market range: 5,000 to 250,000 USD (overall published market range, Sherlock)
Helixchain Labs is a blockchain development company based in Ghent, Belgium that designs, builds and audits custom smart contracts, DeFi protocols and multi-chain infrastructure for FinTech platforms, regulated financial products and enterprise teams. Founded in 2017, it has shipped 142 mainnet contracts with zero critical vulnerabilities reported.
Every tool in Helixchain Labs' technology stack, including Hardhat, Foundry and audit tools such as Slither, Mythril, Echidna and Certora, is already in active use across the company's 142 mainnet contracts, not a framework under evaluation. The stack runs five concrete layers: nine supported chains, four smart-contract languages, dev frameworks and tooling, six token standards and self-hosted archive-node infrastructure.
For a blockchain development company operating in regulated markets, security and compliance are design constraints set at the first discovery call, not optional layers added before audit. Helixchain Labs aligns every engagement to MiCA, KYC/AML, FATF Travel Rule and GDPR requirements, backed by ISO/IEC 27001 and SOC 2 Type II certification, plus zero critical vulnerabilities across 142 mainnet contracts.
The reserve of assets should be composed and managed in such a way that market and currency risks are covered.
Helixchain Labs delivers full cycle blockchain development across nine service lines, from smart contract engineering and protocol architecture to production deployment and ongoing infrastructure. Every line is built to a security-first standard that keeps its audit first-pass rate at 100 percent.
Custom chains, consensus mechanisms and blockchain infrastructure for private, public and hybrid models. Covers both on chain development and off chain development layers.
from 12,000 USD
Scope your infrastructureSecure, gas-optimized Solidity smart contracts in Solidity, Vyper and Rust with formal verification. We write maintainable smart contracts with full contract test coverage built into the delivery pipeline.
from 22,000 USD
Start a contract buildModular on-chain architectures with upgradeability planning, permission design and role based smart contracts baked in from day one, not bolted on later.
from 11,000 USD
Request an architecture reviewProduction ready dApps with intuitive dApp frontend development and robust dApp backend development, delivered as a seamless end-to-end product.
from 15,000 USD
Scope your dAppAudit ready smart contracts via Slither, Mythril, Echidna and Foundry testing plus manual review, formal verification and blockchain deployment testing before every mainnet release.
from 32,000 USD
Book an audit slotProxy-based modular upgrade patterns with smart contract CI CD pipelines to evolve contracts safely without redeployment.
from 26,000 USD
Plan your upgrade pathBridge integration and cross chain integration solutions for seamless asset transfers, plus oracle integration hardening across every supported network.
from 34,000 USD
Scope cross-chain workFull DeFi protocol development covering DEX development, liquidity pool development, staking smart contracts, yield aggregators and oracle risk management.
from 42,000 USD
Talk through your protocolDAOs, token-gated platforms, Web3 wallet integration and Web3 experiences that engage users and unlock revenue via blockchain APIs and on chain analytics.
from 20,000 USD
Start your Web3 buildThus, the proxy doesn’t only forward transactions to and from the logic contract, but also represents the pair’s state.
Not every problem needs a blockchain. Helixchain Labs declines roughly 30 percent of incoming RFPs when a centralized database or a simpler API would serve the client faster and cheaper, including consumer products where wallet friction would kill adoption and token launches lacking legal counsel on securities classification.
We decline roughly 30 percent of RFPs we receive. Forcing a bad fit costs both sides 3 to 6 months and damages outcomes.
The risk is real: according to Chainalysis 2024 Crypto Crime Report, $1.7 billion was stolen from DeFi protocols in 2023, and a substantial share of those exploits targeted forked or template-based contracts where the team had not adapted security to their specific economic surface. We have built our practice around refusing to ship code that cannot survive that environment.
Custom blockchain builds give full control over business logic, gas optimization and security posture, priced from 45,000 to 480,000 USD plus audit. Forked templates cost 5,000 to 20,000 USD plus audit, which is still required, but inherit the source code's attack surface, making custom the better fit for DeFi protocols and RWA issuance carrying material TVL.
| Factor | Custom build | Forked template |
|---|---|---|
| Business logic fit | Exact fit, tuned to your economic model | Generic, may force economic workarounds |
| Security posture | Threat-modeled to your attack surface, externally audited | Inherits the source code AND the source attack surface |
| Gas efficiency | Storage layout and calldata optimized for hot paths | Generic optimization, gas costs compound |
| Upgradability | Proxy patterns plus timelock plus multisig from day one | Often immutable or tied to source upgrade roadmap |
| Token economics | Custom mint/burn/yield curves with formal verification | Pre-set models, cannot be tuned |
| Multi-chain | Chain abstraction layer, new chains in 1 to 2 weeks | Locked to vendor-supported chains |
| Cost | 45,000 USD to 480,000 USD build plus audit | 5,000 USD to 20,000 USD for a fork plus audit (still required) |
Best fit for custom: DeFi protocols, RWA, custom economics, anything with material TVL. Best fit for forks: hackathon prototypes, low-stakes experiments.
Threat-modeled architecture keeps Helixchain Labs' external audit first-pass rate at 100 percent across 142 mainnet contracts, an honest scope declines roughly 30 percent of incoming RFPs rather than force a bad fit and a chain abstraction layer cut new chain integration from 8-12 weeks to 1-2 weeks.
Every engagement starts with smart contract threat modeling and economic attack analysis before a single line of code is shipped. We treat blockchain security and DeFi security as design constraints, not post-audit checklists. 100 percent of our 142 mainnet contracts have passed external audit on first pass because the security envelope is locked at the design stage, not bolted on later.
We decline 30 percent of incoming RFPs because forcing a bad fit costs both sides 3 to 6 months and damages outcomes. We operate as a blockchain technology partner, not a body shop. Our Custom vs Fork comparison and "When blockchain is not the answer" sections exist precisely because we will tell you when a centralized database would solve your problem 10x faster and cheaper.
Our chain abstraction layer normalizes RPC calls, fee estimation and transaction signing across 9 chains. New chain integration drops from 8-12 weeks to 1-2 weeks. Our scalable blockchain development approach means new EVM chains slot in without protocol rewrites. Lanterna Finance grew TVL from 52M to 210M across 7 chains in 8 months using exactly this pattern.
Two production deployments from the Helixchain portfolio, with verified client outcomes: multi-chain TVL expansion for a DeFi lending protocol and oracle redesign for a DEX. Each engagement began with blockchain technical discovery and a written security architecture before any code was written.
Three screens from production deployments show real tooling and real telemetry: a Lanterna Finance dashboard tracking 210.4 million USD in TVL across seven EVM chains, a Fathom Markets oracle console running 3-of-5 price consensus and a Mesa Treasury multisig requiring 4 of 7 signers with a 48-hour timelock.
Helixchain Labs, active in a blockchain technology market Grand View Research valued at USD 57.7 billion in 2025 with a projected 88.2 percent CAGR from 2026 to 2033, has shipped 142 mainnet contracts over nine years with 62 engineers across nine chains. It holds a 100 percent audit first-pass rate, zero critical vulnerabilities, 97 reviews, declining 30 percent of RFPs.
Sources: mainnet contract counts from on-chain deployment receipts; audit pass rate from external audit reports filed by Trail of Bits, ConsenSys Diligence and OpenZeppelin; review counts from Clutch, G2 and GoodFirms as of ; headcount from internal HR records; years operating from founding date 2017.
Every Helixchain Labs engagement follows a four-phase process, Discovery, Architecture, Build and Production, that integrates security and economic threat modeling from the first meeting rather than bolting it on before launch. Discovery alone runs 2 to 4 weeks, and the four phases together span 9 to 16 weeks in total.
Blockchain technical discovery: smart contract threat modeling and economic attack analysis. We define the Web3 architecture and blockchain strategy before writing a single line of code.
Modular on-chain design with blockchain backend architecture, gas optimization plan, multi-sig governance and upgradeability planning locked from day one.
Slither, Mythril, Hardhat testing and Foundry testing in a smart contract CI CD pipeline plus manual review and blockchain QA. External audit coordination and Web3 DevOps run in parallel.
Smart contract deployment runbook with rollback plan, on chain analytics monitoring, on-call rotation and incident response protocol.
Three Helixchain Labs clients moved from a fragile starting point to a measured improvement: one grew TVL from 52 million to 210 million USD across seven chains in eight months, another cut oracle exploits to zero across 14 months after a 2.1 million USD drain and a third dropped node costs from 18,000 to 4,200 USD monthly.
TVL capped at 52M USD. New chain integrations took 8 to 12 weeks each. Engineering bandwidth blocked on chain plumbing.
Seven chains live on one codebase. New chain integration down to 1-2 weeks. TVL grew to 210M across all seven chains in 8 months.
Chainlink price feeds alone. Oracle manipulation drained 2.1M USD in 4 minutes during a thin-liquidity event.
Layered design with TWAP and circuit breakers. Zero exploits in 14 months. Liquidation accuracy up 41 percent.
Infura plus Alchemy at 18,000 USD per month, rate-limited at peak trading, 4-12 second confirmation latency.
Bare-metal infrastructure with geo load balancers. Costs 4,200 USD per month. Latency under 800ms. Zero rate-limit incidents.
Programmable settlement, tokenization and decentralized infrastructure create measurable business value across DeFi and lending, FinTech and payments, real-world asset tokenization and enterprise supply chain deployments, four of six industries where Helixchain Labs works directly with both startups and regulated enterprises.
Full DeFi platform development covering DEX development, liquidity pool development, DeFi staking platform development and yield aggregators. Multi-chain expansion, oracle hardening and economic threat modeling for protocols with material TVL.
Blockchain development for FinTech including stablecoin corridors, stablecoin payment development, cross-border settlement rails and KYC/AML-compliant on-chain payment products. Blockchain for financial platforms where settlement time drops from days to minutes.
Real world asset tokenization covering real estate tokenization platform builds, private credit and commodities. ERC 20 token development, governance token development, token vesting contracts and tokenomics implementation included.
Enterprise blockchain development and supply chain blockchain development: provenance tracking, multi-party settlement and auditable governance where a public or permissioned chain reduces counterparty risk. Blockchain software for enterprises with ISO 27001-backed delivery.
DAO tooling, on-chain voting frameworks, governance token development and treasury management contracts with multi-sig and timelock from day one. Includes key management design for treasury signers.
Token-gated access, NFT infrastructure, non custodial wallet development and Web3 loyalty programs. Wallet architecture is designed for non-custodial security so users retain full key management control.
Three ways to work with Helixchain Labs span a fixed-scope MVP to a long-term infrastructure retainer, all including a written threat model and external audit coordination. The dApp MVP runs 45,000 to 140,000 USD over 9 to 16 weeks, the DeFi Protocol edition runs 160,000 to 480,000 USD and the retainer starts from 9,500 USD per month.
45,000 to 140,000 USD · 9 to 16 weeks
Fixed-scope build of a decentralized application: smart contract implementation, dApp frontend development, automated test suite and external audit coordination. Suitable for startups launching their first on-chain product. Covers dApp architecture services through to dApp launch support.
160,000 to 480,000 USD · 5 to 9 months
End to end blockchain development covering economic threat modeling, multi-chain architecture, oracle design, governance contracts, formal verification and external audit cycle. The right fit for teams ready to build a DeFi platform with material TVL and secure Web3 development at every layer.
From 9,500 USD per month
Ongoing engineering support covering upgrades, on chain analytics monitoring, incident response and new feature development. Suitable for post-launch protocols requiring a dedicated blockchain engineering team on retainer. Includes blockchain infrastructure management and node infrastructure oversight.
The three editions above price a complete engagement. The table below breaks pricing down to the single-deliverable level and checks each figure against independently published market data, so you can see where a fixed Helixchain price sits before you ever request a quote.
| Deliverable | Our fixed price | Typical market range | What sets the difference |
|---|---|---|---|
| Smart contract audit, single contract | from 32,000 USD | 5,000 to 250,000 USD (overall published market range) | Includes the written threat model, economic review and a full Slither, Mythril and Foundry pass in the fixed fee, the same standard that keeps our external audit first-pass rate at 100 percent. |
| Custom dApp MVP build | from 15,000 USD (single module) | 5,000 to 20,000+ USD | Prices one production module (frontend plus backend for a single application). The complete dApp MVP engagement, which bundles the full delivery pipeline and external audit coordination, is quoted separately at 45,000 to 140,000 USD. |
| Token issuance and standards work (ERC-20 / 721 / 1155 class) | from 22,000 USD | 20,000 to 80,000 USD | Formal verification of the token contract runs before mainnet as standard, not as a billed extra once testing has already started. |
| Cross-chain integration | from 34,000 USD | 30,000 to 120,000 USD | Oracle integration hardening with multi-source consensus is scoped in from day one, the same pattern that kept Fathom Markets at zero oracle exploits across 14 months. |
| DeFi protocol build | from 42,000 USD (contract layer) | 40,000 to 100,000 USD (simple: staking, basic DEX); 200,000 to 500,000+ USD (complex: lending, derivatives) | Prices the DeFi contract layer alone (staking or a basic DEX). The full DeFi Protocol engagement, which adds multi-chain architecture, governance contracts and a formal audit cycle, is quoted separately at 160,000 to 480,000 USD. |
| Blockchain architecture and discovery engagement | 8,000 to 18,000 USD | 5,000 to 20,000 USD | Delivers a written threat model, chain-selection recommendation and architecture blueprint you keep regardless of whether you proceed, the same Fixed-Price Discovery edition described above. |
| Node and infrastructure setup | from 12,000 USD | 2,000 to 5,000+ USD (public chain); 10,000 to 30,000+ USD (private chain) | Fixed price for a private or permissioned chain deployment with geo load-balanced nodes and a documented failover runbook, not a per-hour infrastructure bill. |
| Ongoing maintenance and sustain retainer, monthly | from 9,500 USD per month | 5,000 to 15,000 USD per month (bug fixes and updates); 2,000 to 5,000 USD per month (security monitoring) | Bundles bug fixes, on-chain analytics monitoring and incident response into one monthly retainer instead of billing them as separate lines, the same Infrastructure Retainer edition described above. |
Market ranges as published by Sherlock, "Smart Contract Audit Pricing: A Market Reference for 2026", Cleveroad, "DApp Development Cost", Reown, "Blockchain App Development Cost" and Alchemy, "Guide to Blockchain App Development Costs", checked . Our prices are fixed for the scope agreed in writing.
Rust-based Solana programs carry a 25 to 40 percent premium because the pool of qualified reviewers is substantially smaller.
Every fixed-scope engagement is billed against named milestones, never against hours, with nothing invoiced before the deliverable behind it is accepted in writing. Other than the single-milestone Fixed-Price Discovery edition, each fixed-scope engagement runs four milestones, discovery, architecture, build and production, each carrying a written acceptance criterion in the Statement of Work, and clients can exit at any milestone boundary.
Every fixed-scope engagement, other than the single-milestone Fixed-Price Discovery edition, bills against the same four milestones named in our delivery process: discovery, architecture, build and production. Each milestone carries a written acceptance criterion agreed in the Statement of Work before that phase starts, so nothing is invoiced until the deliverable behind it has been accepted.
Invoices are billed in USD against each accepted milestone, never in advance of the work. Payment due dates are set in the Statement of Work alongside deliverables and IP assignment, the same document referenced in our terms of service, so timing is never left informal.
You can stop at any milestone boundary. Our no lock-in guarantee already promises the work-to-date, all source code and the audit trail at that same boundary. Nothing is billed beyond the milestone you stopped at, and everything already paid for, including the threat model, is already yours under the IP assignment terms.
Choosing the right engagement model with a blockchain development company affects budget, timeline and the depth of security coverage. Helixchain Labs prices four editions from 8,000 USD for a fixed discovery engagement up to 480,000 USD for a full DeFi Protocol build, with the dApp MVP at 45,000 to 140,000 USD and the infrastructure retainer from 9,500 USD monthly.
| Edition | Cost model | Timeline | Best for | Includes |
|---|---|---|---|---|
| dApp MVP | Fixed price · 45K to 140K USD | 9 to 16 weeks | Startups launching a first on-chain product, proof-of-concept, grant-funded builds | Smart contract implementation, frontend integration, automated test suite, external audit coordination |
| DeFi Protocol | Milestone-based · 160K to 480K USD | 5 to 9 months | Protocols expecting material TVL, RWA issuers, cross-chain DeFi platforms | Economic threat modeling, multi-chain architecture, oracle design, governance contracts, formal verification, external audit cycle |
| Infrastructure Retainer | Monthly · from 9,500 USD | Ongoing | Post-launch protocols needing engineering continuity, upgrade delivery and incident response | Blockchain infrastructure management, node infrastructure oversight, on-chain analytics monitoring, upgrade delivery, on-call incident response |
| Fixed-Price Discovery | Fixed · 8K to 18K USD | 2 to 4 weeks | Teams that need a blockchain technical discovery report before committing to a full build | Written threat model, chain selection recommendation, architecture blueprint, vendor cost comparison, written go / no-go recommendation |
Discovery engagements have a capped fee and no lock-in. The output is yours regardless of whether you proceed with Helixchain.
Chain selection is one of the highest-leverage early decisions a blockchain development company makes with a client. The table below maps the nine chains Helixchain Labs supports to their finality model, compliance fit, typical gas cost and the class of product they suit best.
| Chain | Best for | Finality | Compliance fit | Typical gas cost |
|---|---|---|---|---|
| Ethereum mainnet | High-value DeFi protocols, RWA issuance, DAO governance requiring maximum security | ~12 s (2 epochs) | Strong (MiCA-recognized, deep legal precedent) | High · USD 3-15 per complex tx |
| Arbitrum | DeFi protocols needing low fees with Ethereum-grade security; high-frequency settlement | ~1 s (optimistic, 7-day challenge) | Strong (inherits Ethereum L1 security) | Low · USD 0.01-0.10 per tx |
| Optimism / Base | Consumer dApps, gaming, loyalty programs and OP Stack chains with custom sequencers | ~2 s (OP Stack) | Moderate (L2; regulatory status evolving) | Low · USD 0.01-0.05 per tx |
| Polygon | Enterprise pilots, NFT platforms, supply chain; large existing ecosystem | ~2 s (PoS) | Moderate (enterprise-friendly tooling) | Very low · USD 0.001-0.01 per tx |
| BNB Chain | High-volume retail DeFi in APAC markets; FinTech products with existing BSC user base | ~3 s (PoSA) | Moderate (centralized validator set) | Low · USD 0.05-0.20 per tx |
| Avalanche | Institutional DeFi, subnet-based private chains, regulated financial products | Sub-1 s (Snowman) | Strong (subnet isolation; Avalanche9000 compliance tooling) | Low · USD 0.02-0.10 per tx |
| Solana | High-throughput trading platforms, order book DEXs, real-time NFT mints | 400 ms (PoH) | Developing (CFTC scrutiny active; check legal counsel) | Very low · USD 0.00025 per tx |
| Starknet | ZK-proven compute, privacy-preserving DeFi, applications requiring provable correctness | ~10 min (ZK proof generation) | Emerging (ZK proofs align well with privacy regulation) | Very low · USD 0.001-0.01 per tx |
Gas costs are indicative as of Q1 2026. Actual costs vary with network congestion. Our blockchain consulting engagement includes a written chain-selection recommendation with on-chain cost modeling for your transaction profile.
Every Blockchain Development Company engagement is priced differently based on six factors that drive complexity: contract scope, chain count, audit depth, third-party integrations, compliance requirements and timeline compression. A single ERC-20 contract takes 2 to 4 weeks, while a full DeFi lending protocol with governance and upgradeable proxies runs 5 to 9 months.
A single ERC-20 token contract takes 2 to 4 weeks; a complete DeFi lending protocol with oracle integration, governance and upgradeable proxy architecture takes 5 to 9 months. Contract count and interaction complexity are the primary cost drivers.
Our chain abstraction layer reduces multi-chain marginal cost, but each additional chain still requires deployment, configuration and chain-specific test coverage. Cross-chain bridge integration adds 3 to 6 weeks and a dedicated bridge risk assessment.
Every engagement includes automated tooling (Slither, Mythril, Echidna) plus Hardhat testing and Foundry fuzz testing. External audit fees are billed at cost (Trail of Bits, ConsenSys Diligence, OpenZeppelin). Formal verification via Certora adds 4 to 8 weeks for high-TVL DeFi protocols.
Oracle integration (Chainlink, Pyth, Redstone), KYC/AML hooks, bridge protocols and subgraph indexing each add engineering time proportional to the integration's attack surface and test coverage requirements.
MiCA-aligned token issuance, FATF Travel Rule embedding and on-chain KYC architectures require additional design and legal coordination time. EU-regulated financial products typically add 20 to 35 percent to the core engineering cost.
Compressed delivery schedules require larger parallel teams. A dApp MVP that runs 9 weeks with a 4-person team may require 7 people to finish in 5 weeks, increasing the fee. We recommend against compression that eliminates threat modeling or audit cycles.
Choosing a blockchain development company comes down to six checks: a written economic threat model before coding starts, a verifiable external audit first-pass rate, named and checkable founder credentials, a willingness to decline unsuitable projects, a defined deliverables list and clear IP and exit terms at project close.
Of the 47 DeFi exploits analyzed in our research, 71 percent originated in the economic model, not the Solidity. Ask any vendor whether they produce a written economic threat model before coding starts. If they only reference passing an audit, the risk surface is not fully covered. Helixchain Labs produces a threat model document as the first deliverable of every engagement.
Our own external audit first-pass rate sat at around 78 percent before threat modeling moved into the architecture phase, measured in our own dataset and published in research note HLX-2025-03. We give our own before-state because no industry figure for this metric is published anywhere we could verify. A vendor quoting a lower rate is either sending under-tested code to audit or not doing the pre-audit static analysis. Ask for audit reports, not just a badge. Helixchain Labs has achieved a 100 percent external audit first-pass rate across all 142 mainnet contracts.
Blockchain development is a high-stakes domain. The lead engineer should have a verifiable academic or industry background you can check. Helixchain Labs is led by Marcus Delgado, PhD (Distributed Systems, TU Delft; Applied Cryptography, EPFL), whose LinkedIn profile and research record are publicly verifiable.
A reputable blockchain development company declines projects where a simpler solution is better. Helixchain Labs declines roughly 30 percent of incoming RFPs when a centralized database, an API or an existing protocol would serve the client better. Vendors who never say no are maximizing billings, not outcomes.
Ask for a list of deliverables before signing. A complete engagement should produce: source-verified and audited contracts, a deployment runbook, a threat model document, a test report, API or SDK documentation and a knowledge-transfer session. See our deliverables section for the full list Helixchain Labs provides on every project.
All source code, documentation and audit reports produced by Helixchain Labs are assigned to the client in full at project close. There is no license-back, no vendor lock-in and no dependency on proprietary tools. You receive the complete working codebase with no strings attached.
| Factor | In-house team | Specialist agency | Freelance contractors |
|---|---|---|---|
| Cost profile | A fixed payroll cost that keeps running whether or not there is billable work that month, plus the recruiting, benefits and tooling overhead layered on top of salary. | A fixed project fee from 45,000 to 480,000 USD depending on scope, or a retainer from 9,500 USD per month once the protocol is live. You pay for the engagement itself, not for a bench carried between projects. | Typically billed hourly or per short contract instead of a fixed scope, so the total can drift once work is underway unless the engagement is pinned to a written Statement of Work. |
| Time to first line of code | Recruiting and onboarding a team happens before any contract code gets written, a runway that has to close before a build can start at all. | Discovery (2 to 4 weeks) and architecture (2 to 3 weeks) come first, with the written go/no-go sign-off before any code is committed. The delivery team is already assembled, with no hiring cycle to close first. | Still requires sourcing and vetting a contractor for each specialist role before work starts, usually a narrower search than staffing a full in-house team but a search all the same. |
| External audit access | External audit is a relationship you build yourself: sourcing a firm, scoping the engagement and budgeting for it separately from whatever internal review your own engineers already do. | External audit coordination is included in every engagement tier, and no contract goes to external audit until our own security and audit lead judges it ready, the discipline behind a 100 percent external audit first-pass rate across all 142 mainnet contracts shipped. | Depends entirely on the individual contractor: coordinating an external audit firm is rarely bundled into a freelance scope and usually becomes a line item you source and manage yourself. |
| Bus factor | Concentrated in whichever engineers you hired. If the one person who understands a contract's edge cases leaves mid-build, that context leaves with them unless redundancy was built in from day one. | Spread across a team of 62 engineers and seven specialist roles, with a named senior smart-contract engineer and Marcus Delgado, PhD co-signing the threat model on every engagement, so delivery does not rest on one person. | Concentrated by default in a single individual per role, with continuity after they move on depending entirely on whatever handover the contract itself specifies. |
| Retention risk after launch | Sits with your own retention. If the engineers who shipped the protocol leave after launch, the operational knowledge leaves with them unless it was already documented as thoroughly as a formal handover would require. | All source code, documentation and audit reports are assigned to the client at project close with no license-back and no vendor lock-in, backed by a recorded knowledge-transfer session and a written upgrade and incident response guide so your own team can run the protocol independently. | IP assignment and handover quality depend on the individual agreement signed with each contractor, and neither is guaranteed to match a documented, repeatable process unless you write it into the contract. |
Helixchain Labs has begun integrating on-chain AI agent settlement, ML risk scoring for DeFi liquidations, verifiable ZK inference and AI-assisted contract auditing into client work, four concrete patterns spanning a live CI/CD pipeline, a production-ready component and an active 2026 build in the fastest-moving area of blockchain software development.
Autonomous AI agents (built on frameworks such as ElizaOS and similar) that hold wallet keys and settle micro-transactions on-chain without human approval. We design the smart contract permission model that enforces agent spending limits, multi-sig overrides and emergency pause mechanisms. Production-ready on ERC-4337 account abstraction.
Off-chain ML models that score liquidation risk in real time, with results committed to an oracle that adjusts on-chain collateral thresholds dynamically. Reduces both over-liquidation losses and under-collateralization risk versus static thresholds. We architect the oracle pipeline and the smart contract interface that consumes the model output safely.
ML model inference executed off-chain and verified on-chain via a ZK proof of correct computation. Relevant for any protocol that needs to act on private model outputs (credit scoring, fraud signals) without revealing inputs. Our Starknet team is actively building the first client implementation on this pattern in Q3 2026.
LLM-based static analysis tools used as a first-pass layer alongside Slither and Mythril, with results triaged by senior engineers before audit submission. Reduces false-negative rate in the pre-audit toolchain without replacing manual review or external audit. Part of our smart contract CI/CD pipeline since Q1 2026.
Named ecosystem partners such as Chainlink, Pyth, The Graph, Alchemy, OpenZeppelin and Sumsub sit inside Helixchain Labs' delivery stack, spanning five categories: security and governance; KYC and compliance; oracles; indexing; node infrastructure. Ecosystem depth like this is a practical proxy for a blockchain development company's delivery speed.
One of the clearest ways to evaluate a blockchain development company is to ask exactly what a client receives at project close. Every Helixchain Labs engagement delivers six standard items regardless of tier: audited contracts, a threat model document, a deployment runbook, a test suite with coverage report, API and SDK documentation and a knowledge transfer session.
All smart contracts verified on each target chain's block explorer. External audit report included. You own the source, the deployed bytecode and the audit trail in full.
Written analysis of the protocol's economic attack surface: oracle manipulation vectors, liquidity drain scenarios, governance attack paths and recommended mitigations. Produced before any code is written.
Step-by-step deployment guide covering constructor arguments, multisig initialization, proxy configuration, initial state setup and post-deployment verification checks on each chain.
Hardhat and Foundry test suites including unit tests, integration tests, fuzz campaigns and invariant suites. Coverage report showing branch and line coverage. CI pipeline configuration included.
NatSpec-annotated contract interfaces plus a developer SDK (TypeScript or Python, as agreed) that wraps contract calls with typed inputs, gas estimation and error handling for your frontend or backend team.
A live session with your engineering team covering the architecture decisions, upgrade procedures, emergency pause and recovery flows, monitoring setup and the threat model rationale. Recorded and provided as a reference artifact.
Helixchain Labs has 62 engineers. A typical client project assembles 4 to 7 of the seven specialist roles below, matched to project scope. Every engagement is led by a named senior smart-contract engineer who co-signs the threat model with Marcus Delgado, PhD.
Owns the overall system design: chain selection, consensus trade-offs, on-chain vs off-chain boundaries and the modular contract architecture. Produces the blockchain technical discovery report.
Writes and gas-optimizes Solidity (and Rust / Cairo for non-EVM chains). Owns contract test coverage, the CI/CD pipeline and pre-audit internal review. Two to three engineers per project on DeFi Protocol engagements.
Runs Slither, Mythril, Echidna and Foundry fuzzing; triages findings; coordinates with Trail of Bits, ConsenSys Diligence or OpenZeppelin for the external audit cycle. Sole owner of the 100 percent first-pass rate metric.
Maps protocol design to MiCA, KYC/AML, FATF Travel Rule and GDPR constraints. Translates regulatory requirements into on-chain contract specifications. Engaged on FinTech and RWA projects.
Owns oracle integration hardening (Chainlink, Pyth, Redstone), bridge integration, subgraph development and the blockchain backend development layer (The Graph, Alchemy, custom event processors).
Runs blockchain deployment testing on forked mainnet environments, validates upgrade scripts, oversees blockchain QA pipelines and produces the coverage report that accompanies every external audit submission.
Single client point of contact. Owns the milestone schedule, audit coordination calendar, change-request process and the weekly written status report. All delivery milestones are tied to the threat model phases, not arbitrary sprint numbers.
A blockchain development company that is confident in its work makes the risk clear and takes a share of it. Helixchain Labs backs every engagement tier with six client protections: fixed-price discovery, full IP ownership, an audit-pass commitment, a no-lock-in exit, a defined handover and a free scoping call.
The blockchain technical discovery engagement has a fixed fee of 8,000 to 18,000 USD. You receive the full threat model, architecture blueprint and chain-selection recommendation. No obligation to proceed. The output is yours regardless.
All contracts, test suites, tooling, documentation and audit reports are assigned to the client at project close under the SOW. No license-back, no proprietary dependency, no vendor lock-in of any kind.
We do not submit contracts to external audit unless our internal security and audit lead judges them ready. If a contract fails external audit on first submission, we remediate at no additional cost. Our 100 percent external audit first-pass rate reflects this commitment in practice.
You can leave any engagement at a milestone boundary with the work-to-date, all source code and the audit trail in hand. We do not build dependencies on internal libraries or hosted services that would make your codebase non-portable.
Every project ends with a recorded knowledge-transfer session, annotated source code, a deployment runbook and a written upgrade and incident response guide so your internal team can operate the protocol independently.
A 30-minute call with a senior Helixchain Labs engineer to evaluate your project, flag any scope risks and confirm whether blockchain is the right tool for your problem. No sales pressure. We decline 30 percent of initial inquiries.
First two weeks of every engagement: kick-off call · threat model workshop · architecture draft reviewed by Marcus Delgado, PhD · written go/no-go sign-off before any code is committed.
Helixchain Labs was founded and is led by Marcus Delgado, PhD, whose academic background in distributed systems and applied cryptography directly informs how every engagement is structured. He holds a PhD from TU Delft and an MSc from EPFL, with 12 years in distributed systems and 8 years building production blockchain systems.
Founder and CTO
I design and build reliable blockchain platforms, from lightweight dApps to high-load distributed systems. My team and I have shipped 142 contracts to mainnet with zero critical vulnerabilities reported.
The lesson that shaped Helixchain came in Q1 2018, three months into my first commercial protocol engagement. We had inherited a forked AMM, the audit had passed and we deployed on a Tuesday. By Friday a thin-liquidity oracle attack drained 1.4 million dollars in under 12 minutes. The codebase was clean. The economic model was not. That weekend I rewrote the entire risk framework, and "threat-model the economics, not just the code" has been the first sentence on every engagement contract since.
Read the foundational paper: "Security-First Smart Contract Architecture: A Framework for Production Blockchain Engineering" by Marcus Delgado, PhD. Helixchain Research Note 2025-03, 28 pages.
View Marcus Delgado on LinkedIn ↗
Ask the founder a questionSecurity-First Smart Contract Architecture is Helixchain Labs' 28-page research note analyzing 47 historical DeFi exploits between 2020 and 2024, finding that 71 percent originated in the economic model rather than the code. The methodology it proposes cut time-to-mainnet by 34 percent and lifted the external audit first-pass rate from its 78 percent pre-framework baseline to 100 percent in its dataset.
This research note formalizes the threat-modeled architecture pattern Helixchain has applied across 142 mainnet contracts since 2017. We analyze 47 historical DeFi exploits between 2020 and 2024, decomposing each into a code-level vector and an economic-surface vector. Across the dataset, 71 percent of exploits succeeded because the economic model was not stress-tested against the protocol's specific liquidity profile, even when the code passed audit. We propose a 4-stage methodology, Discovery, Architecture, Build, Production, that integrates economic threat modeling, smart contract security design and oracle risk management into every phase. We present quantitative evidence from three production deployments (multi-chain TVL expansion, 3-of-5 oracle consensus via oracle integration hardening and self-hosted node infrastructure) showing the methodology's effect on time-to-mainnet, cost-per-deployment and post-launch incident rate. The paper also discusses how scalable dApps require DeFi security to be modeled before the first line of Solidity is written.
Available on request to qualified parties under NDA. Request the full PDF →
Five verified client reviews from Clutch and G2, sourced from teams across DeFi lending, decentralized exchanges, supply chain and FinTech settlement, sit alongside an aggregate 4.9 out of 5 on Clutch across 62 reviews, 4.8 on G2 across 21 reviews and 5.0 on GoodFirms across 14 reviews.
Ratings as published on Clutch, G2 and GoodFirms, last checked against our most recent verified review in .
Priya Ashton
CTO at Lanterna Finance
Helixchain rebuilt our chain abstraction layer in 9 weeks. TVL grew from 52M to 210M across 7 chains in 8 months. Their audit coordination saved us from the single-chain cap that was costing us enterprise deals.
TVL 52M → 210M, 7 chainsTakeshi Morimoto
Head of Product at Fathom Markets
After the oracle drain, Helixchain designed a 3-of-5 consensus across Chainlink, Pyth and a protocol-specific TWAP. Zero exploits in 14 months. They treated our economic surface as seriously as the code.
0 exploits, 14 monthsElena Hartwell
Founder at Briar Supply
Three other vendors quoted us 9 months and 400K for the same scope. Helixchain shipped in 11 weeks with zero critical audit findings. They told us early which features did not need blockchain.
11 weeks, 0 critical findingsSamuel Okonjo
Director of Engineering at Kesi Remit
Helixchain built our stablecoin corridor with KYC and AML hooks from day one. Settlement time dropped from 3 days to under 4 minutes and fees are down 62 percent. Every contract in the corridor passed external audit on the first submission, no rework, no delays. They understood FinTech compliance better than our previous vendor.
3 days → 4 min, fees -62%Ana Villanueva
CEO at Mesa Treasury
Our enterprise buyers demanded auditable governance. Helixchain designed upgradeable contracts with a 4-of-7 multi-sig and timelock from day one. We passed ISO 27001 first pass and the multi-sig rollout had zero incidents.
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1. No advice. This page is marketing information, not legal, financial, investment, securities or tax advice. Helixchain Labs builds blockchain software. We do not advise on whether a token is a security under any jurisdiction, we do not advise on the tax treatment of crypto assets and we do not advise on regulatory compliance outside our written engagement scope.
2. Scope of services. Engagements with Helixchain Labs are governed by a separate signed Statement of Work that defines deliverables, milestones, payment terms, IP assignment and warranties. Every pricing band and timeline on this page describes what earlier projects cost and took. None of it is a binding offer.
3. Smart contract risk. Smart contracts deployed at client direction carry inherent risk including but not limited to: code-level vulnerabilities, economic model exploits, oracle manipulation, governance attacks, third-party dependency failures and chain reorgs. Helixchain Labs warrants delivery of audited code per the SOW, not the absence of all possible risk.
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Common questions about hiring a blockchain development company cover cost, timeline, chain choice and audit process. Helixchain Labs prices a dApp MVP at 45,000 to 140,000 USD over 9 to 16 weeks, supports nine chains through one chain abstraction layer and holds a 100 percent external audit first-pass rate across 142 mainnet contracts.
A blockchain development company designs, builds and audits the smart contracts, protocols and infrastructure that let an application run on a blockchain instead of a centralized server. Helixchain Labs provides custom blockchain development services for DeFi platforms, FinTech products and regulated on-chain products, covering blockchain software development, dApp development, token development and blockchain infrastructure management.
The work follows the same four phases on every engagement: discovery, architecture, build and production. Security is treated as a design constraint from the first phase, not a checklist applied before launch, which is why Helixchain Labs has practiced security first blockchain development since 2017.
In practice that means a named team, drawn from roles including the Solidity engineering team and the security and audit lead, works from a written economic threat model through to source-verified contracts, an external audit and a recorded knowledge-transfer session. Helixchain Labs has shipped 142 mainnet contracts with zero critical vulnerabilities reported under this process.
Cost depends on scope. A dApp MVP runs 45,000 to 140,000 USD over 9 to 16 weeks. A DeFi protocol runs 160,000 to 480,000 USD over 5 to 9 months. Infrastructure retainers start from 9,500 USD per month for ongoing engineering capacity after launch.
Every tier includes smart contract development, blockchain QA, external audit coordination and Web3 DevOps as required by the engagement. Teams that want a cost estimate before committing to a full build can start with the fixed-price discovery engagement, priced at 8,000 to 18,000 USD for a written threat model and architecture blueprint.
Single-deliverable pricing is also available outside the three main tiers: a standalone smart contract audit starts from 32,000 USD, and cross-chain integration work starts from 34,000 USD. All figures are fixed for the scope agreed in writing, not hourly estimates that can drift during delivery.
Look for a named founder with verifiable credentials, an audit process you can inspect, a track record of zero post-launch incidents and references you can check. A vendor that will not name who leads the engineering is harder to hold accountable when something goes wrong.
Ask whether they practice smart contract threat modeling before coding starts, not just after, and whether they can show audit ready smart contracts from prior engagements rather than a portfolio of contracts that were never externally audited. The strongest signal is a vendor willing to publish its own numbers rather than asking you to take reputation on faith.
Helixchain Labs publishes its methodology, certificate numbers and delivery metrics openly on this page: 142 mainnet contracts, a 100 percent external audit first-pass rate and named case studies with client-verified outcomes. Every claim on this page is checkable against the certifications and reviews sections below.
Custom blockchain development gives you exact business logic, full smart contract architecture control and a defensible security posture, because every line is written and threat-modeled against your specific economic surface. Forks ship faster but inherit the source code attack surface of whatever protocol was copied, bugs, assumptions and all.
We recommend custom for DeFi protocols with material TVL, RWA issuance or any product where the economic model differs meaningfully from the source it might be forked from. Forks remain a reasonable choice for hackathon prototypes and low-stakes experiments where speed matters more than a defensible security posture.
Our blockchain consulting process includes a written recommendation on this question before any code is scoped, part of the same discovery phase that produces the economic threat model. See the custom build vs fork comparison table on this page for a factor-by-factor breakdown across business logic fit, security posture, gas efficiency, upgradability, token economics, multi-chain support and cost.
Ethereum, Polygon, Arbitrum, Optimism, Base, BSC, Avalanche, Solana and Starknet, nine chains in total. Our Solidity engineering team covers all EVM chains including Ethereum development and Layer 2 development, plus Rust and Cairo for Solana and Starknet respectively.
We use a chain abstraction layer that normalizes RPC calls, fee estimation and transaction signing, so adding a new chain to an existing product takes 1 to 2 weeks instead of the 8 to 12 weeks a custom integration normally requires. That pattern is what let Lanterna Finance expand from one chain to seven without a rewrite.
Chain choice is not one-size-fits-all: Ethereum mainnet suits high-value DeFi and RWA issuance, Arbitrum and Optimism suit high-throughput DeFi at low fees, Solana suits order-book DEXs and Starknet suits ZK-proven compute. See the chain selection guide on this page for finality, compliance fit and typical gas cost across all nine.
Yes. We run Slither, Mythril and Echidna in continuous integration, plus Hardhat testing and Foundry testing for fuzz coverage, on every contract before it is considered ready for external review. This automated layer catches the mechanical classes of bugs before a human auditor ever sees the code.
For external audit coordination we partner with Trail of Bits, ConsenSys Diligence and OpenZeppelin, matching the partner to the protocol's risk profile and the client's compliance requirements. High-TVL DeFi protocols also receive formal verification through Certora, adding a mathematical proof layer on top of testing.
Our audit first-pass rate stands at 100 percent across all 142 mainnet contracts because blockchain security is built into the architecture phase, not retrofitted once testing starts. Our own first-pass rate was around 78 percent before this process, a before-state from our own dataset rather than an industry figure, and that is the gap this process was built to close.
Blockchain technical discovery on its own runs 2 to 4 weeks and produces a written threat model, chain-selection recommendation and architecture blueprint you keep regardless of whether you proceed. Most clients fold this phase into a larger engagement rather than buying it standalone.
A dApp MVP runs 9 to 16 weeks including dApp testing and external audit, split across our four-phase Helixchain Verified Delivery process: discovery, architecture, build and production. A production DeFi protocol runs 5 to 9 months, covering DeFi protocol development, formal verification and the external audit cycle.
Timeline is driven mainly by contract count, chain count and audit depth, the same factors detailed in the cost drivers section of this page. Compressing a schedule is possible with a larger parallel team, but we recommend against any compression that eliminates threat modeling or audit cycles.
We decline roughly 30 percent of RFPs. We say no when a centralized database would solve the problem 10x faster, when wallet UX friction will kill consumer adoption, when token launches lack legal counsel on securities classification and when a client wants to develop blockchain applications without a written threat model.
Forcing a bad fit costs both sides 3 to 6 months and damages outcomes, so we would rather lose the engagement than ship something that was never going to work. Our role as a Web3 development partner is to protect your engineering investment, not to bill hours on a project we do not believe in.
This is a considered scope decision, not a marketing line. See the when blockchain is not the answer section on this page for the specific problem classes we route away from blockchain, including enterprise workflows where Hyperledger or APIs are simpler than a public chain.
The best ones do. Of 47 DeFi exploits analyzed in Helixchain Labs Research Note HLX-2025-03, 71 percent originated in the economic model, not the Solidity code, even in cases where the code itself had already passed an audit.
Any blockchain development company you engage should produce a written economic threat model before coding starts, covering oracle manipulation vectors, liquidity drain scenarios and governance attack paths. Helixchain Labs treats the threat model as the first deliverable on every engagement, not a post-audit add-on.
This is not an abstract policy. In 2018, a thin-liquidity oracle attack drained 1.4 million dollars from a protocol whose code had passed audit but whose economic model had never been stress-tested. Founder Marcus Delgado, PhD has called "threat-model the economics, not just the code" the first sentence on every engagement contract since.
A complete engagement should deliver six things: source-verified and audited contracts, an economic threat model document, a deployment runbook, an automated test suite with a coverage report, API or SDK documentation and a recorded knowledge-transfer session.
Helixchain Labs provides all six on every project tier, with all IP assigned to the client at close under the signed Statement of Work. There is no license-back and no dependency on proprietary tooling that would make the codebase harder to hand off.
The deployment runbook alone covers constructor arguments, multisig initialization, proxy configuration and post-deployment verification checks per chain, and the knowledge-transfer session is recorded so it remains a reference artifact after the team disbands. See the deliverables section on this page for the full description of each item.
Chain selection depends on four factors: required finality speed, regulatory compliance posture, expected transaction volume and user geography. Ethereum mainnet suits high-value DeFi protocols and RWA issuance requiring maximum security, at the cost of higher gas fees than any other chain we support.
Arbitrum and Optimism suit DeFi products that need high transaction throughput at low fees while still inheriting Ethereum-grade security. Solana suits order-book DEXs and real-time applications that need sub-second finality, and Starknet suits ZK-proven compute and privacy-preserving DeFi where provable correctness matters more than raw speed.
Our blockchain consulting engagement delivers a written chain-selection recommendation with cost modeling for your transaction profile, the same recommendation process described in the chain selection guide on this page, which compares all nine supported chains on finality, compliance fit and typical gas cost.
A fixed-price project such as the dApp MVP at 45,000 to 140,000 USD or the DeFi Protocol at 160,000 to 480,000 USD is scoped upfront with defined deliverables, milestones and a fixed fee agreed before work starts. Nothing about scope or price moves once the Statement of Work is signed unless you request a change.
A retainer, from 9,500 USD per month, provides ongoing engineering capacity for a protocol that has already launched: upgrades, on-chain analytics monitoring, incident response and new feature development. It is billed monthly rather than against fixed project milestones, because ongoing operational work does not have a natural end date the way a build does.
Helixchain Labs also offers a fixed-price discovery engagement at 8,000 to 18,000 USD for teams that need a threat model and architecture blueprint before committing to either path. See the engagement editions table on this page for a full comparison of cost model, timeline and what each edition includes.
Helixchain Labs responds to new project inquiries backed by a 100 percent audit first-pass rate, usually within one business day. Contact routes include a dedicated sales address, a security address for compliance and certificate requests, a phone line staffed Monday to Friday from 09:00 to 18:00 CET and an office open by appointment.