OpenZeppelin
OpenZeppelin 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.
- Audits
- 500+
- Findings logged
- 6,000+
- all severities
- Crit + high + med
- 2,000+
- material findings
Overview
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.
- Languages
- Solidity, Rust, Cairo, Vyper
- Chains
- Ethereum, Polygon, Arbitrum, Optimism, Base, Avalanche, BNB Chain
- Expertise
- DeFi, DEX, Lending, L1, L2, Bridge, NFT, DAO, Token, Oracle, Stablecoin, ZK
- Services
- Smart Contract Audit, Code Review, Security Consulting, Incident Response
Track record
Findings by severity
| Critical, high & medium | 2,000+ | 33.3% |
| Low, informational & other | 3,500+ | 58.4% |
| Unclassified | ~500 | 8.3% |
Across 500+ audits, OpenZeppelin has logged 6,000+ findings, of which 2,000+ were rated critical, high or medium, roughly 33% of the total.
OpenZeppelin's published severity groups add up to fewer findings than its published total. The difference is shown as unclassified rather than assigned to either group.
Figures are updated periodically and may not include every engagement. Severity labels follow each report's own classification.
Selected work
Notable clients
- Compound V3Lending
- The GraphInfrastructure
- WorldcoinToken
- EigenLayerStaking
FAQ
Questions about OpenZeppelin
Where can I find OpenZeppelin's audit reports?
OpenZeppelin publishes its audit reports at openzeppelin.com/research.
What does OpenZeppelin audit?
OpenZeppelin lists Smart Contract Audit, Code Review, Security Consulting and Incident Response across Solidity, Rust, Cairo and Vyper, and has published work on Ethereum, Polygon, Arbitrum, Optimism, Base, Avalanche and BNB Chain.
How much does a OpenZeppelin audit cost?
Procur3 doesn't hold published pricing for OpenZeppelin. Audit cost depends on scope, code size and the depth of review. See smart contract audit cost 2026 for typical ranges, or get an indicative figure from the audit cost calculator.
How do I get a quote from OpenZeppelin?
Post your scope on Procur3 and send it to OpenZeppelin as a private request, or open it to every matched firm and compare quotes.
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