Three Sigma is a blockchain security firm known for deep protocol-level audits across DeFi, Bridge, DEX. This profile aggregates its public audit record, 1,050+ findings and notable clients — so you can evaluate fit before requesting a competitive quote through Procur3.
Three Sigma is a blockchain security firm specialising in smart contract audits and protocol-level security reviews. The team works primarily in Solidity, Rust and Move, covering engagements across Ethereum, BSC, Polygon and related ecosystems. Core areas of expertise include DeFi, Bridge, DEX, Lending.
With 150+ public audits on record, Three Sigma has worked with notable protocols including Maple, Magma, Orange, Felix. The firm's review history provides a transparent track record that teams can evaluate before engaging.
Through Procur3, teams can put their scope to Three Sigma alongside other matched firms and receive a competitive quote — without a three-week sales cycle.
| Critical | 42 | 4% |
| High | 105 | 10% |
| Medium | 153 | 14.6% |
| Low | 338 | 32.2% |
| Informational | 263 | 25% |
| Gas | 149 | 14.2% |
Across 150+ public audits, Three Sigma has logged 1,050+ findings. Critical and high-severity issues account for roughly 29% 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.
No incidents recorded. Three Sigma has a clean post-audit track record across all publicly tracked engagements.
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