Full Stack Web3 Security

Securing the Future of Web3

Quantstamp is a global leader in blockchain security. Since 2017, we’ve secured billions in digital assets and worked with some of the most recognized names in web3.

Whether it's smart contracts, L1s, or web infrastructure, we've got you covered.

60+
Ecosystems
$500B+
Digital Assets Secured
1400+
Audits Conducted

Trusted by the industry’s most
notable projects

What our clients say

Why Quantstamp

Since 2017, we’ve worked with some of the most recognized names in web3. Discover why hundreds of clients trust Quantstamp to secure their projects.

Our team hails from companies such as the Ethereum Foundation, Google, Meta, MathWorks, Microsoft and others, with deep expertise in formal verification, static analysis, blockchain audits, penetration testing, and original leading-edge research.

Our team hails from companies such as the Ethereum Foundation, Google, Meta, MathWorks, Microsoft and others, with deep expertise in formal verification, static analysis, blockchain audits, penetration testing, and original leading-edge research.

Quantstamp is familiar with a wide range of programming languages and has audited Layer 1s, Layer 2s, DeFi protocols, NFT marketplaces, exchanges, clients, and more. Our team has extensive experience with meta-languages and compilers, both in academia and in the field.

Quantstamp provides managed security services for continuous security and monitoring post-deployment. Our insurance product, Chainproof, secures customers against smart contract hacks and slashing risks.

Quantstamp is securing web3 through our audits and security services, while also building the future of the ecosystem through our products, partnerships, investments, and education. We have secured two Ethereum 2.0 clients, Prysm and Teku, and received multiple grants from the Ethereum Foundation for L2 security and scaling.

Recent posts

News & Announcements

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Quantstamp Announcements
October 2026: The Worst Month on Record
Crypto lost $6.50B across 35 incidents in October 2026, nearly nine times September's $742.0M and the worst month for hacks on record. Almost all of it came from a single event. On Oct 29, attackers drained an estimated $6.3B from Binance's hot wallets in about 20 minutes, the largest crypto theft ever recorded, and the FBI attributed it on Oct 31 to North Korea's TraderTraitor group.
Read more about October 2026: The Worst Month on Record
Quantstamp Announcements
September 2026: The Approval Layer Was Exploited
Crypto lost $742.0M across 33 incidents in September 2026, almost three times August's $255.5M and the biggest month of the year so far. Bitget's $387M hack and Liquid Network's $320M exploit account for about 95% of that, with the other 31 incidents adding up to $35.0M. In August, the prices going into contracts were wrong. In September, attackers went after the systems that approve transactions in the first place. Here's the month in security 👇
Read more about September 2026: The Approval Layer Was Exploited
Quantstamp Announcements
August 2026: The Price Feed Was Exploited
Crypto lost $255.4M across 46 incidents in August 2026, roughly level with July's $254.4M, with more incidents than any month this year. June and July incidents were largely due to key compromises, but August shifted to price manipulation. Eleven oracle and price-manipulation incidents accounted for $135.87M, or 53% of the month. Two chains stopped producing blocks and rolled back state to undo the damage. Here's the month in security 👇
Read more about August 2026: The Price Feed Was Exploited

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