Our Mission
Making Crypto Safer
Securing smart contracts, optimizing tokenomics, and preventing exploits, so projects can scale safely. We help builders turn complex systems into resilient, attack-ready protocols, protected by engineering precision and real-world testing.
150+
audits
completed
$10B+
in client
assets protected
$200B+
in transacted
value secured
300+
crit / high issues found
Our Story
Our journey began in January 2022, when three cybersecurity engineers saw how early and fragile Web3 still was.
Audits were rare, exploits were constant, and projects needed real technical partners to help the space mature. That vision matched our shared passion for blockchain, code, and security.
What started with three people has grown into a global team of specialists and researchers working with some of the best builders in the industry. We’ve helped protocols across ecosystems strengthen their foundations, improve their economics, and ship with confidence.
Thousands of lines reviewed, one goal, safer code.
Today, over $10 billion in client assets are protected through our audits, and more than $200 billion in on-chain value has been secured by our work. The mission is still the same as day one keep pushing Web3 forward, safely.
Why Choose Three Sigma?
We’ve completed over 150 audits and published dozens of in-depth guides on blockchain security and design, bringing unmatched experience and practical knowledge to every project we review.
Our team combines engineering, economic, and operational expertise, covering every layer of a protocol, from frontend and smart contracts to incentive models and on-chain mechanics.
Trusted by industry leaders like Maple, Uniswap Foundation, Arbitrum Foundation, zkSync, Liquity, Abstract, and more. We deliver the level of security expected by the biggest names in Web3.
Explore Our Services
& Audit Reports
Proven results from real DeFi protocols. See how we’ve helped teams identify vulnerabilities, prevent exploits, and launch safely.
Security, auditing, and advisory, built for Web3. From protocol design to post-deployment analysis, we secure everything that powers decentralized finance.
Our Team Leaders
Our Partners & Clients
Hear from our Clients
Latest Articles
Explore our blog and stay up to date with the latest news on web3.
Frequently Asked Questions
Check out the Smart Contract Audit F.A.Q.
What is Three Sigma?
Three Sigma is a Web3 security firm specializing in smart contract and blockchain security audits, economic risk modeling, and exploit prevention. We help projects launch safely across DeFi, infrastructure, RWAs, gaming, privacy, and other blockchain verticals.
What makes Three Sigma different from other audit firms?
At Three Sigma, we treat your project with the same dedication you do. We understand the long hours and the passion behind every line of code, and our mission is to help you protect it through real security expertise. From first deploy to every future upgrade, we stay by your side so you can keep building while we protect what matters.
What chains and codebases do you audit?
We audit nearly all major ecosystems and languages, including EVM-compatible chains using Solidity, Rust-based protocols like Solana and NEAR, and Move-based platforms such as Sui and Aptos. Beyond code, we also conduct advanced risk modeling and economic analysis for protocols across any blockchain.
How can I work with Three Sigma?
You can request an audit by sharing your codebase and preferred timeline. Our team will review your materials and deliver a detailed quote, scope, and expected start date within 24–48 hours.
Where can I see examples of your work?
Explore our case studies for past audit results and examples of how we’ve helped protocols identify vulnerabilities, optimize tokenomics, and strengthen their security foundations.