Decentralized
Finance
Systems
Application
Security
Decurity is a tier-1 web3 security audit firm and elite team of ethical hackers who won hardest CTF competitions
Services

Smart Contract Audit

Security Advisory

Custodial Security
Risk Assessment
Invariant Development
Security Monitoring
Testimonials
Legendary DeFi creators and founders trust us and have something to say:
“We had a great experience working with Decurity. Both the quality and speed of their work are second to none. They’ve earned our trust through the insightful and non-obvious findings they delivered. Their communication was also clear, efficient, and genuinely pleasant throughout the entire process. That’s why moving forward, we will continue to work with them on our major projects.”
— Gleb Alekseev, Product Owner at 1inch
"Decurity reviewed Mellow Interoperability components twice in 2025 and we have been impressed with their work. In addition to technical expertise Decurity brought consistent engagement with our dev team. We value actionable feedback, and our tech team worked closely with Decurity researchers to address issues effectively. Their structured approach made a real impact on the quality of our code."
— Nick Stoev, Core contributor at Mellow Protocol

"I have worked with the Decurity team on the smart contract audits for Gearbox Protocol. They quickly identified potential attack vectors, thoroughly examined our complex codebase, and provided concise reports. I appreciate Omar and his responsiveness throughout the entire process. I highly recommend Decurity as reliable and trusted auditors."
— Michael Lazarev, Co-Founder and CTO of Gearbox Protocol
“Stableunit has worked with Decurity twice, and we continue to stay in touch. Both audits were efficient and technically insightful. As a technically mature team, we value deep, constructive feedback, and Decurity consistently delivers. They’re methodical, responsive, and easy to work with throughout the entire process. Their input helped us strengthen our codebase where it truly mattered.”
— Alex Lebed, Architect at Stable Unit DAO
“We worked with Decurity on a full security audit of our embedded wallets. The team was professional throughout—communicative, detail-oriented, and technically sharp. Their methodology was sound, and the final report was clear and actionable. We’re confident in the results and fully recommend them as a trusted audit partner.”
— Domen Uršič, Co-Founder of Apillon
“We've worked with Decurity several times already since 2023 — the audits are always smooth and professional. They guide you from the initial consultation all the way to the final retest once all findings are addressed. The level of expertise and fresh outside perspective stand out. A great team you can rely on while building in web3.”
— Vadim Zolotokrylin, CEO and Co-Founder at Holdex
Portfolio
We've successfully completed dozens of complex audits. Here're the reports for some of them, see more on Github.



Competitions
We are passionate competitive hackers and won toughest CTF (Capture The Flag) competitions — olympic games of smart contract auditors

Partners
We partner with L1/L2 blockchains, development firms, other security companies, hedge funds, and other web3 projects


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.
See our public reports on Github to learn more.
About Us
Multiple world CTF hacking champions
Top-50 hackers worldwide according to HackerOne
Discovered critical issues during most of engagements
Blockchain security experts with proven record since 2017
Our Customers







