OpenZeppelin is a blockchain security firm known for deep protocol-level audits across DeFi, DEX, Lending. This profile aggregates its public audit record, 6,000+ findings and notable clients — so you can evaluate fit before requesting a competitive quote through Procur3.
OpenZeppelin is a blockchain security firm specialising in smart contract audits and protocol-level security reviews. The team works primarily in Solidity, Rust, Cairo and Vyper, covering engagements across Ethereum, Polygon, Arbitrum and related ecosystems. Core areas of expertise include DeFi, DEX, Lending, L1.
With 500+ public audits on record, OpenZeppelin has worked with notable protocols including Compound V3, The Graph, Worldcoin, EigenLayer. The firm's review history provides a transparent track record that teams can evaluate before engaging.
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| Critical | 280 | 4.7% |
| High | 700 | 11.7% |
| Medium | 1,020 | 17% |
| Low | 1,800 | 30% |
| Informational | 1,400 | 23.3% |
| Gas | 800 | 13.3% |
Across 500+ public audits, OpenZeppelin has logged 6,000+ findings. Critical and high-severity issues account for roughly 33% of all findings — a profile reflecting thorough, deep-dive analysis across diverse protocol architectures.
Figures aggregated from publicly available audit reports. Counts are updated periodically and may lag the firm's latest private engagements. Severity labels follow each report's own classification.
Incidents recorded where a protocol was exploited after a OpenZeppelin engagement. Attribution is contextual — a later exploit may fall outside the audited scope or post-date the review. We link the public source so you can judge for yourself.
1 public incident is associated with a protocol OpenZeppelin had engaged with. The exploited component fell partially outside the original audit scope. See the linked post-mortem for the full timeline and root cause.
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