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
1300+
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
What to Do in the First 24 Hours After a Protocol Exploit
Your protocol was exploited. A step-by-step web3 incident response guide for the first 24 hours: pause the contract, trace the funds, and recover.
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Quantstamp Announcements
July Security Beat: Keys Over Code (Again?)
Crypto lost more than $240 million across 29 incidents in July 2026, up roughly 216% from June's $75.87M, even as the number of attacks fell from 40 to 29. For the second month running, the damage didn't come from clever contract exploits. The same failure class ran through Web2, from a $12.3M rail-industry ransom to a 1TB bank breach that started with one employee's email. Here's the month in security 👇
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Quantstamp Announcements
June Security Beat: Keys Over Code
$75.32M was lost across 32 crypto incidents in June, up from May's $59.52M. No coordinated campaign carried the month, but one targeted operation did. A targeted social-engineering attack against Humanity Protocol reached the keys behind the $H token and drained $32M, roughly 42% of every dollar lost in June. Quantstamp led the independent investigation and traced the tooling to a phishing campaign previously seen targeting macOS users. Offchain, a fresh npm supply chain wave hit Red Hat's packages on the first day of the month, and a PeopleSoft zero-day was exploited for two weeks before Oracle said a word. Here's the month in security 👇
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