We architect and deploy custom smart contracts for DeFi, NFTs, DAOs, and enterprise applications. Our code is built on Solidity 0.8+ with OpenZeppelin security patterns and undergoes rigorous audits before mainnet deployment. Deliverables include full test suites, comprehensive documentation, and deployment scripts.
LABS
Services
Zero-Knowledge Circuit Security Audit
Comprehensive security assessment of custom zk-SNARK or zk-STARK circuits for vulnerabilities in logic, constraints, and cryptographic implementations, ensuring proof correctness and soundness.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your protocol.
- Custom Logic: Tailored
ERC-20,ERC-721,ERC-1155tokens, staking pools, governance modules, and automated market makers. - Security-First: Formal verification, gas optimization, and integration of Chainlink Oracles for secure off-chain data.
- Audit-Ready Code: We prepare your contracts for third-party audits with detailed spec sheets and inline
NatSpeccomments.
Reduce your time-to-market from months to weeks. We deliver a fully functional MVP in 2-4 weeks, complete with a staging environment on
Ethereumtestnets orPolygon.
key-features-cards
PROVEN PROCESS
Our Circuit Audit Methodology
Our systematic, multi-layered approach ensures your zero-knowledge circuits are mathematically sound, secure, and production-ready. We don't just find bugs; we build confidence.
01
Architecture & Design Review
We analyze your circuit's high-level design, cryptographic assumptions, and integration points to identify systemic risks before line-by-line analysis begins.
100%
Design Coverage
Phase 1
Audit Stage
02
Mathematical Soundness Verification
Our cryptographers rigorously verify the underlying zk-SNARK/STARK protocols, constraint system correctness, and soundness proofs to prevent logical flaws.
Formal
Proof Review
Phase 2
Audit Stage
03
Constraint System & Code Audit
Line-by-line review of Circom, Halo2, or Noir code for common vulnerabilities (under-constraining, over-constraining), side-channels, and gas inefficiencies.
Manual + Automated
Analysis
Phase 3
Audit Stage
04
Integration & Adversarial Testing
We test your circuit within its full application context—smart contracts, provers, verifiers—simulating real-world attack vectors and edge cases.
End-to-End
Testing
Phase 4
Audit Stage
05
Comprehensive Reporting & Remediation
Receive a prioritized report with CVSS-scored vulnerabilities, proof-of-concept exploits, and clear remediation guidance. We support you through fixes.
CVSS v3.1
Scoring
Guided
Remediation
06
Final Verification & Sign-off
We re-audit all fixes, provide a final security attestation, and issue a public certificate to build trust with your users and partners.
Public
Attestation
Guaranteed
Re-audit
benefits
EXPERTISE YOU CAN TRUST
Why Choose Our ZK Circuit Audit
Our security audit is engineered for technical leaders who cannot afford hidden vulnerabilities. We deliver actionable, high-signal findings that protect your protocol and your users.
02
Comprehensive Vulnerability Detection
We systematically test for critical flaws: soundness errors, under-constrained circuits, side-channel leaks, and gas inefficiencies. Our reports include PoC exploits, not just theoretical risks.
03
Proven Security Methodology
Our process is battle-tested, having secured over $2B+ in TVL across private and public ZK circuits. We follow a hybrid approach of manual review, formal verification, and automated fuzzing.
$2B+
TVL Secured
100+
Circuits Audited
04
Actionable Developer Reports
Receive a prioritized, developer-friendly report with clear remediation steps and code snippets. We provide post-audit support to verify fixes and ensure secure deployment.
05
Focused on Production Readiness
We audit with deployment in mind, evaluating gas costs, prover/verifier performance, and integration risks. Get a clear path from audit completion to mainnet launch.
06
Trusted by Leading Teams
We are the chosen audit partner for VC-backed startups and established protocols building on zkEVMs, private DeFi, and identity solutions. Your security is our reputation.
ZK Circuit Security Audit Tiers
Comprehensive Audit Scope & Deliverables
Compare our structured audit packages, designed to secure your zero-knowledge applications from development to production.
| Audit Component | Essential | Professional | Enterprise |
|---|---|---|---|
Core ZK Circuit Logic Review | |||
Plonk / Groth16 Proving System Analysis | |||
Cryptographic Assumption & Parameter Validation | |||
Front-running & MEV Vulnerability Analysis | |||
Integration with L1/L2 Smart Contracts | |||
Formal Verification (Where Applicable) | |||
Detailed Technical Report | PDF + Interactive | PDF + Interactive + Remediation Session | |
Remediation Support & Re-audit | 1 round | 2 rounds | Unlimited (within scope) |
Response Time SLA | 72h | 24h | 4h |
Post-Audit Consultation | 1 hour | 4 hours | Dedicated Engineer |
Estimated Timeline | 1-2 weeks | 2-4 weeks | 4+ weeks (custom) |
Starting Price | $15,000 | $45,000 | Custom Quote |
process-walkthrough
CORE SERVICES
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom smart contracts on EVM and Solana that power your core business logic. Our focus is on security-first development, gas optimization, and audit readiness from day one.
- Token Systems:
ERC-20,ERC-721,ERC-1155, SPL, with custom minting, vesting, and staking. - DeFi Protocols: Automated Market Makers (AMMs), lending/borrowing pools, yield aggregators.
- Enterprise Logic: Multi-signature wallets, access control, upgradeable proxy patterns.
- Cross-Chain: Secure bridging and messaging with
LayerZeroorWormhole.
We deliver battle-tested contracts with a formal verification process, reducing audit cycles by 40% and mitigating critical vulnerabilities before deployment.
Our development lifecycle includes:
- Comprehensive Testing: Unit, integration, and fork-testing on mainnet forks.
- Gas Profiling: Optimization reports targeting >15% gas reduction.
- Deployment & Verification: Full suite deployment with on-chain source code verification.
- Post-Launch Support: Monitoring, incident response, and upgrade management.
Why a specialized audit is a critical investment
Audit with Experts vs. Internal Review
A direct comparison of the security outcomes, resource requirements, and long-term risks between a professional ZK circuit audit and an internal code review.
| Security Factor | Internal Team Review | Chainscore Expert Audit |
|---|---|---|
ZK-Specific Vulnerability Detection | ||
Formal Verification for Circuits | ||
Audit Report & Remediation Plan | Internal notes | Detailed report with CVSS scores |
Time to Comprehensive Review | 2-4 weeks (team diverted) | 1-2 weeks (parallel work) |
Expertise Required | Senior ZK engineer (scarce) | Dedicated team of 2-3 specialists |
Third-Party Credibility for VCs/Users | Low | High (verifiable proof of audit) |
Post-Audit Support & Consultation | None | Included for critical fixes |
Risk of Undetected Critical Bug | High | Extremely Low |
Effective Cost (Engineering Hours + Risk) | $50K-$150K+ | $15K-$50K |
Expert Insights
Zero-Knowledge Circuit Audit FAQs
Get clear answers to the most common questions CTOs and technical founders ask about securing their ZK circuits and protocols.
Our methodology is a multi-layered, manual-first approach. We combine formal verification techniques with manual code review by cryptographers specializing in ZK-SNARKs and ZK-STARKs. The process includes: 1) Circuit Logic Review for soundness and completeness, 2) Constraint System Analysis to identify under-constrained or contradictory logic, 3) Cryptographic Primitive Assessment of libraries like Circom, Halo2, or Noir, and 4) Integration Testing with the on-chain verifier. This ensures we catch logical, cryptographic, and implementation-level vulnerabilities that automated tools miss.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall