DeFi Security

Full-stack web3 security services delivered by top-tier ethical hackers with a focus on the real financial impact


We provide security audit services of any complexity ranging from the cryptographic protocol audit to bridge API penetration testing.

Smart Contract Security Audit

Smart Contract Audit

Security audit of the Ethereum Solidity smart contracts, Solana Rust programs, Aptos Move contracts or any kind of a dApp

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Web3 Security Advisory

Security Advisory

Comprehensive continuous security consulting and audit, implementation of the Security SDLC practices, monitoring, and incident response

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Web3 Security Audit

Vulnerability Management

Penetration testing and security assessment of the web3 applications, layer 1 nodes, bridges, and infrastructure

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Risk Assessment

Risk Assessment

Web3 protocol external risk and viability assessment for the traders, PE, and VC funds during the due dilligence

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DeFi Whitepaper Verification

Whitepaper Verification

Validation and assessment of the mathematical tokenomics models proposed in the whitepaper and implemented in code

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Security Monitoring

Security Monitoring

Monitoring the contracts for hack attempts, suspicious transactions and dangerous actions as well as financial solvency

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Case Studies

We've successfully completed dozens of complex audits.
Here're the reports for some of them.

Our team joint with partners placed 2nd in the most respected smart contract security audit competition — Paradigm CTF 2022.

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Security audit of the Yearn Finance no-hedge joint strategy helped to ensure the validity of the yield farming strategy logic and the security of the implementation.

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Security audit of the GIVEth smart contracts led to discovery of a critical vulnerability in another protocol and remediation of the associated risk.

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Breakdown of our most popular consulting services

Security Audit

Our approach is on par with the top tier audit firms. We are focused on finding exploitable vulnerabilities with the real impact. We usually don't look at the audit as a simple 40-person-hours task and try to exhaust all possible ideas.

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Continuous Security Advisory

Our security advisory services include consulting and security design, regular code review and penetration testing, DevSecOps and Secure SDLC implementation, and security monitoring solutions.

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Why Decurity?

We are a team of veteran hackers who dived into the blockchain and smart contract security in the early days. Under our supervision, an audit is not just a filing of the checklist but rather a full-fledged research.

  • Multiple world CTF hacking champions
  • Top-50 hackers worldwide according to HackerOne
  • Discovered critical issues during 90% of engagements
  • Blockchain security experts with proven record since 2017

Our Customers

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