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
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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Quantstamp Announcements
May 2026 Security Beat
$59.52M was lost across 29 crypto incidents, down sharply from April's ~$635M. No single hack carried the month. The bigger story happened off-chain, where a self-propagating npm worm called Mini Shai-Hulud kept resurfacing in new waves through the month, ultimately spanning more than 1,000 malicious package versions across the npm ecosystem.
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Quantstamp Announcements
April 2026 Security Beat: Same Actors, New Targets
April was undoubtedly a rocky month in security. $635M was lost across 28 crypto incidents. The Axios npm package was compromised on day one, exposing an estimated 600,000 installs in three hours. Vercel was breached through a third party. Three major CVEs under active exploitation. Here's the month in security 👇
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