Last updated: October 2026
Three Sigma
Vetted on Procur3Three Sigma is a blockchain security firm known for deep protocol-level audits across DeFi, Bridge, DEX. This profile aggregates its audit record, 1,050+ findings and notable clients — so you can evaluate fit before requesting a competitive quote through Procur3.
About Three Sigma
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, BNB Chain, Polygon and related ecosystems. Core areas of expertise include DeFi, Bridge, DEX, Lending.
With 150+ 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.
Findings by severity
| Critical, high & medium | 300+ | 28.6% |
| Low, informational & other | 580 | 71.4% |
Across 150+ audits, Three Sigma has logged 1,050+ findings, of which 300+ were rated critical, high or medium — roughly 29% 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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