Last updated: October 2026
OpenZeppelin
Vetted on Procur3OpenZeppelin is a blockchain security firm known for deep protocol-level audits across DeFi, DEX, Lending. This profile aggregates its audit record, 6,000+ findings and notable clients — so you can evaluate fit before requesting a competitive quote through Procur3.
About OpenZeppelin
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+ 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.
Through Procur3, teams can put their scope to OpenZeppelin alongside other matched firms and receive a competitive quote — without a three-week sales cycle.
Findings by severity
| Critical, high & medium | 2,000+ | 33.3% |
| Low, informational & other | 3,500+ | 66.7% |
Across 500+ audits, OpenZeppelin has logged 6,000+ findings, of which 2,000+ were rated critical, high or medium — roughly 33% of the total.
Figures are updated periodically and may not include every engagement. Severity labels follow each report's own classification.
Notable clients
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