XBOW
Sequoia-led $20M seed (Jun-2024); founded by Oege de Moor (Semmle / GitHub CodeQL founder). Autonomous offensive-security agent that finds and exploits web vulns end-to-end. Topped HackerOne leaderboard in 2025 (first AI on the leaderboard).
Active · Verified 2026-10-28 · fresh as of 2026-10-28 · 20 cited facts, 0 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Tier
- T3
- Created
- 2024 (founded) vendor fix
- Latest release
- not applicable — wrong section fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Usage-based, scoped to environment (request a quote); available via AWS, Google, Oracle and Microsoft marketplaces vendor fix
- Freshness
- 2026-10-28 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
- Compliance
- hipaa, soc2-type1, soc2-type2 vendor fix
When to use
Optimised for: autonomous web-app pentest agents
Anti-fit: not applicable — wrong section
Pros & cons
Pros
Topped HackerOne leaderboard as first AI; Sequoia-led; strong founder pedigree (Semmle/CodeQL).
Cons
Closed product; limited public details; benchmark dominance vs production OSS targets, not always real-world enterprise scopes.
Claims & capabilities
$20M seed Jun-2024 (Sequoia); $75M Series B Jun-2025 (Sequoia); topped HackerOne leaderboard 2025 as first AI participant
Technical surface
- API surface
- not applicable — wrong section
- Backend storage
- not applicable — wrong section
- Deployment
- not applicable — wrong section
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- not applicable — wrong section
- MCP
- not applicable — wrong section
- A2A
- not applicable — wrong section
- OpenTelemetry
- not applicable — wrong section
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OSS (MIT) prompt-engineering eval and red-team CLI; supports OWASP LLM Top-10 vulnerability tests, jailbreak generation, and CI/CD pipeline integration. $5M seed Mar-2024 (Andreessen Horowitz). Founders ex-Discord + ex-Smile Identity.
- Protect AI T2
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Sources (19 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Autonomous AI pentester (web app exploitation agent) vendor
- What it does & what's distinct Sequoia-led $20M seed (Jun-2024); founded by Oege de Moor (Semmle / GitHub CodeQL founde… vendor
- Claims / benefits $20M seed Jun-2024 (Sequoia); $75M Series B Jun-2025 (Sequoia); topped HackerOne leaderb… vendor
- Created 2024 (founded) vendor
- Funding $120M Series C Mar-2026 (over $1B val; led by DFJ Growth + Northzone) vendor
- Customers / scale Stealth enterprise + bug-bounty programs vendor
- Pricing Usage-based, scoped to environment (request a quote); available via AWS, Google, Oracle … vendor
- HQ New York vendor
- Founders / pedigree Oege de Moor (CEO; founder of Semmle → GitHub CodeQL) vendor
- Optimised for autonomous web-app pentest agents vendor
- Pros Topped HackerOne leaderboard as first AI; Sequoia-led; strong founder pedigree (Semmle/C… vendor
- Cons Closed product; limited public details; benchmark dominance vs production OSS targets, n… vendor
- Project & sources xbow.com/ vendor
- architecture-deployment-locus cloud vendor
- licensing-bucket commercial vendor
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo
- compliance-certifications hipaa,soc2-type1,soc2-type2 vendor
- sdk-languages rest vendor
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-28
- Pricing “not applicable — wrong section” → “Usage-based, scoped to environment (request a quote); available via AWS, Google, Oracle and Microsoft marketplaces” source
- Funding / ownership “$20M seed + $75M Series B Jun-2025 (Sequoia)” → “$120M Series C Mar-2026 (over $1B val; led by DFJ Growth + Northzone)” source