Fidesium is a UK smart contract security firm that audits Web3 protocols and then re-runs audit-grade analysis on every commit, pull request and deployment, for DeFi, RWA, gaming and infrastructure teams building on EVM chains and Solana.
Fidesium LTD was incorporated in March 2023 and is registered in the UK. The core team does the audit work, using deterministic static and AST analysis tooling we built ourselves, not AI scanning and not a subcontractor running someone else’s scanner. So far that is $250M+ secured and 110+ contracts audited, with 23 audit reports published in full across 16 protocols on our audit portfolio.
Greg Bock and Abraham Polishchuk founded Fidesium in March 2023 around one problem. An audit describes a codebase on one day, and the code does not stop: dependencies move, parameters change, a new module lands, and the report quietly stops describing what is deployed.
So the people who built the tooling are the people who do the audits, and the same tooling keeps running on every commit after the report is delivered. When you hire Fidesium, you work with the engineers below.
Greg spent 15 years in startups, delivering enterprise solutions for high street retail and banks and building products to the highest industry security standards. He writes on the Fidesium blog about how audits decay and how protocols get attacked, including When does a smart contract audit actually expire?, and he has spoken at ETHNA 2025, NapulETH 2026 and Solana London’s Buildstation 2026.
Abraham spent 15 years leading development teams and using large data sets to compute actuarial risk in real time, writing and auditing many smart contracts along the way. He writes Fidesium’s audit case studies and platform updates, including Fidesium x Adrena and Fidesium x Sumvin, and he has spoken at EthDam, EthSofia and CryptoBalkans in 2025 and at Solana London’s Buildstation in 2026.
Chadi identifies, analyses and mitigates smart contract vulnerabilities, across both research and client engagements. He wrote Fidesium’s research on why static analysis fails at access control context, and his route into the field is told in Chadi Sebbar’s path to smart contract security.
Harry is responsible for technical communication and positioning, translating complex security concepts into clear, decision-ready information for founders and engineering teams.
| Event | Year | Speaker | Talk |
|---|---|---|---|
| EthDam | 2025 | Abraham Polishchuk | SAST tooling for Web3 |
| EthSofia | 2025 | Abraham Polishchuk | The state of security in Web3 |
| CryptoBalkans | 2025 | Abraham Polishchuk | Common hacks, scams and threat vectors |
| ETHNA | 2025 | Greg Bock | Web3 Security is Broken / Why Automation is the Only Way Forward |
| NapulETH | 2026 | Greg Bock | Algorithmic Risk Pricing |
| Solana London, Buildstation | 2026 | Greg Bock | Dissecting the New Meta of Hacks |
| Solana London, Buildstation | 2026 | Abraham Polishchuk | Defensive Programming in Web3: An Auditor's Guide to Writing Safer Solana Programs |
| Company name | Fidesium (legal name Fidesium LTD) |
|---|---|
| Type | Smart contract security firm, a private limited company registered in the UK |
| Founded | March 2023 |
| Founders | Greg Bock (Co-Founder and CEO) and Abraham Polishchuk (Co-Founder and CTO) |
| Headquarters | London, United Kingdom |
| Website | www.fidesium.xyz |
| Core offering | Manual smart contract audits, backed by continuous automated analysis on every commit, pull request and deployment |
| Services | Manual audits; blockchain penetration testing; post-deployment monitoring, bug bounty management and architecture review; SOC 2 readiness for Web3 teams (we prepare you for an independent auditor's assessment; Fidesium does not issue SOC 2 reports); a scanner for CI/CD with GitHub and GitLab integration |
| Chains | EVM chains (our specialism) and Solana |
| Approach | The core team does the audit work, using deterministic static and AST analysis tooling built in house. No AI scanning, and no subcontractor running someone else's scanner |
| Pricing | Manual audits from $5,000. Scanner plans at $399, $799 and $1,499+ a month. Penetration testing and security services are quoted against your scope. Full pricing |
| Free trial | The scanner is free to try, no credit card required |
| Customers served | DeFi, RWA, gaming and infrastructure teams building on EVM chains and Solana |
| Projects delivered | 110+ contracts audited. 23 audit reports published in full across 16 protocols, in the audit portfolio |
| Value secured | $250M+ |
| Audit record | Every audit is minted as an on-chain NFT, so the record of what was reviewed, at which commit, is verifiable and permanent |
| Working with Fidesium | Email and Telegram, directly with the engineers who built the tooling. Every manual audit and penetration test is quoted against your scope |
| Conference talks | EthDam, EthSofia, CryptoBalkans and ETHNA (2025); NapulETH and Solana London's Buildstation (2026) |
| Contact | [email protected] or the contact page |
| Social | X and LinkedIn |
Fidesium is a security platform dedicated to making automated smart contract audits continuous, accessible, and affordable for Web3 teams worldwide.
Audits
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