Three Sigma

Three Sigma is a Web3 cybersecurity and blockchain security firm specializing in smart contract auditing, blockchain protocol security, economic risk analysis, and exploit prevention. The company helps blockchain and decentralized finance (DeFi) projects identify vulnerabilities, strengthen their architecture, optimize tokenomics, and launch secure, resilient protocols. Its mission is to make crypto safer by combining engineering expertise, security research, economic analysis, and real-world attack modeling.
Three Sigma provides comprehensive security services across the Web3 ecosystem, including smart contract audits, Solidity audits, Rust and Move audits, dApp security audits, blockchain bridge audits, blockchain protocol audits, and operational security (OpSec) audits. Its services extend beyond code review to include economic audits, tokenomics audits, mechanism design reviews, ecosystem risk assessments, points and incentives program design, and strategic DeFi research and development.
The company's auditing methodology combines detailed manual code review with automated security analysis, threat modeling, targeted testing, fuzzing, property testing, and attack-path analysis. Three Sigma evaluates not only individual smart contracts but also protocol architecture, dependencies, governance mechanisms, access controls, upgrade patterns, transaction flows, and interactions between different components. Following an audit, the company provides severity-ranked findings, practical remediation recommendations, retesting, and post-audit support to help development teams resolve identified issues before deployment.