Quantstamp provides security services for Web3 projects, including smart-contract, Layer 1, and web-infrastructure audits, as well as economic-exploit assessments and post-deployment monitoring. Founded in 2017, it works with blockchain ecosystems, DeFi protocols, NFT marketplaces, exchanges, and other Web3 and enterprise clients. Its insurance product, Chainproof, covers customers against smart-contract hacks and slashing risks.