Three Sigma
Three 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.
- Audits
- 150+
- Findings logged
- 1,050+
- all severities
- Crit + high + med
- 300+
- material findings
Overview
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.
- Languages
- Solidity, Rust, Move
- Chains
- Ethereum, BNB Chain, Polygon, Avalanche, Arbitrum, Optimism
- Expertise
- DeFi, Bridge, DEX, Lending, DAO, Token, Staking
- Services
- Smart Contract Audit, DApp Audit, Bridge Audit, Protocol Audit, Economic Audit, Tokenomics Audit
Track record
Findings by severity
| Critical, high & medium | 300+ | 28.6% |
| Low, informational & other | 580 | 55.2% |
| Unclassified | ~170 | 16.2% |
Across 150+ audits, Three Sigma has logged 1,050+ findings, of which 300+ were rated critical, high or medium, roughly 29% of the total.
Three Sigma'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
- MapleLending
- MagmaLiquid Staking
- OrangeDeFi
- FelixDeFi
- LayerbL2
FAQ
Questions about Three Sigma
Where can I find Three Sigma's audit reports?
Three Sigma publishes its audit reports at github.com/threesigmaxyz/publications.
What does Three Sigma audit?
Three Sigma lists Smart Contract Audit, DApp Audit, Bridge Audit, Protocol Audit, Economic Audit and Tokenomics Audit across Solidity, Rust and Move, and has published work on Ethereum, BNB Chain, Polygon, Avalanche, Arbitrum and Optimism.
How much does a Three Sigma audit cost?
Procur3 doesn't hold published pricing for Three Sigma. 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 Three Sigma?
Post your scope on Procur3 and send it to Three Sigma as a private request, or open it to every matched firm and compare quotes.
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