Quantstamp

• Name: Quantstamp
• URL: https://quantstamp.com/
• Category: security company / smart-contract and infrastructure review operator / exploit-research and tooling company
• Tags: ethereum-ecosystem
• Summary: Quantstamp belongs in companies/, not projects/, because the useful question is who operates the audit, infrastructure-testing, exploit-research, and adjacent coverage stack that downstream teams may start treating as part of their practical security perimeter. The leverage is not limited to PDF output. It sits in how Quantstamp scopes audits, what offchain infrastructure it reviews, how it packages post-deployment monitoring and disclosure handling, and which research or tooling surfaces it turns into reusable security workflow for other teams.
• What it does:
  • Performs smart-contract audits and broader security reviews for Layer 1s, Layer 2s, DeFi protocols, NFT projects, exchanges, clients, and infrastructure systems
  • Offers infrastructure-focused penetration testing for APIs, cloud systems, browser extensions, mobile apps, web apps, node operators, SaaS-style components, and other offchain surfaces around web3 systems
  • Runs economic-exploit analysis aimed at flash-loan and market-structure vulnerabilities that may evade code-only review
  • Markets managed security services for post-deployment monitoring and continuing security support rather than only one-time audit engagements
  • Publishes audit-readiness guidance and maintains public research/tooling repositories including the l2-security-framework and erc4337-checker
  • Incubated Chainproof as an insurance-adjacent product for smart-contract-hack and slashing-risk coverage, which shows the company packages assurance beyond conventional audit reports
• Key claims:
  • The homepage says Quantstamp has worked with major web3 teams since 2017, has audited Layer 1s, Layer 2s, DeFi protocols, NFT marketplaces, exchanges, and clients, and provides managed security services post-deployment
  • The homepage also says Chainproof secures customers against smart-contract hacks and slashing risks, which is a strong signal that Quantstamp wants to be read as a broader security operator rather than only an audit boutique
  • The infrastructure-audits page says web3 includes smart contracts plus the Web2 architecture around them, then frames Quantstamp’s offering as review of APIs, cloud systems, node operators, and other critical offchain components using automated scanning plus manual penetration testing
  • The economic-exploits page says Quantstamp turned flash-loan-attack research into a production-level automated tool for uncovering economic-exploit vulnerabilities, which reinforces the firm’s claim to reusable research infrastructure rather than only bespoke consulting
  • The audit-readiness guide says Quantstamp allocates at least three audit engineers per project, mixes manual review with proprietary tooling, and performs fix reviews, which makes methodology and workflow part of the practical control surface
  • Quantstamp’s public repositories include l2-security-framework and erc4337-checker, confirming that the company also ships reusable security artifacts into the wider ecosystem
• Whitepaper: No single canonical Quantstamp company whitepaper surfaced in this pass. The strongest current primary materials remain the official site, infrastructure-audits and economic-exploits pages, audit-readiness guidance, responsible-disclosure policy, Chainproof materials, and first-party GitHub repositories already captured in ../whitepapers/quantstamp-primary-sources-2026-04-30.md.
• Sources:
  • https://quantstamp.com/
  • https://quantstamp.com/audits
  • https://quantstamp.com/infrastructure-audits
  • https://quantstamp.com/economic-exploits
  • https://quantstamp.com/audit-readiness-guide
  • https://quantstamp.com/legal/responsible-disclosure
  • https://quantstamp.com/blog/chainproof
  • https://github.com/quantstamp
  • https://raw.githubusercontent.com/quantstamp/l2-security-framework/master/README.md
  • https://raw.githubusercontent.com/quantstamp/erc4337-checker/master/README.md

Internal linkages

• Product-layer note collapsed into alias: quantstamp.
• Useful adjacent company reads: trail-of-bits, openzeppelin, and blocksec.
• Useful contrast where the emphasis stays more on formal review tooling than one broad security-services operator: chainsecurity.

Protocol / company boundary

• There is no especially useful standalone Quantstamp protocol boundary doing analytical work here.
• The meaningful surface is the company-run security shell: audit scoping, offchain infrastructure testing, exploit-research packaging, managed monitoring, disclosure workflow, and the public tooling or methodology that customers may inherit.
• That is why Quantstamp belongs in companies/: the sharper question is who is operating the review-and-assurance workflow around other teams’ systems, not whether a branded website can be treated as an isolated product.

Control surface

• Practical leverage sits in how Quantstamp defines review scope, how much of a client’s offchain stack it sees, which exploit classes it codifies into tooling or methodology, and whether customers keep Quantstamp embedded after deployment for monitoring or response.

• The company usually does not control customer protocols directly, but it can become part of the real security-operating perimeter once teams rely on its review cadence, infrastructure testing, monitoring, and disclosure processes.

• Read Quantstamp as a security company with workflow and tooling gravity, not as a neutral protocol primitive.

• Last reviewed: 2026-08-11 UTC