Short answer: XBOW runs autonomous AI pentests of web apps and APIs, built for large portfolios and sold through a quote. For the same job with a different fit, look at RunSybil, Escape, Aikido, Novee or Barrion (our product). For networks and Active Directory, NodeZero or Pentera. For human pentesters, Terra, Cobalt or Synack. For open source, Strix or Shannon. Checked 2026-09-26.
Barrion is our product. We've held it to the same criteria as every other tool. Every claim about another vendor links to its own site or to press coverage, checked on 2026-09-26.
What is XBOW?
XBOW is an autonomous offensive security platform from Seattle, founded by Oege de Moor, who created GitHub Copilot. Its AI agents test web applications and their APIs, and independent validators confirm each exploit before a finding is reported as validated. Issues it can't exploit are listed separately as informational.
It has one of the strongest public track records in the category. In June 2025 it became the first autonomous system to reach #1 on HackerOne's US leaderboard. In March 2026 it raised $120M at a valuation above $1B (SecurityWeek).
| XBOW, from its own site | |
|---|---|
| What it tests | Web apps and their APIs. Other asset types are on its roadmap |
| How it validates | Independent validators confirm exploitability. Validated findings carry an exploit, reproduction steps and evidence |
| When it runs | "Every time your applications change", plus retest assessments |
| Human review | Review before findings surface is mentioned. Who reviews isn't stated |
| Pricing | Usage-based, no public price. Also on AWS, Google Cloud, Oracle and Microsoft marketplaces |
| How to start | Quote or demo |
| Data residency | US by default. EU (Frankfurt) and Singapore in private preview for Enterprise |
Why look for an XBOW alternative?
XBOW is a strong product. Teams usually look elsewhere for one of these reasons:
- You want to start today. XBOW is bought through a quote. Some alternatives are self-serve.
- You need data in the EU now. XBOW's EU region is an Enterprise private preview.
- You want a person to review findings or sign the report. XBOW doesn't say who reviews.
- You need more than web apps. Internal networks, Active Directory and mobile are outside XBOW's current scope.
- You want to run it yourself. Open-source frameworks cover some of the same ground.
XBOW alternatives by use case
Web apps and APIs
The closest alternatives: AI agents that test web apps and APIs and confirm findings before reporting them.
| Tool | How it validates | When it runs | Start | Human review | Where it's stronger |
|---|---|---|---|---|---|
| Barrion (ours) | Checked against the live app. Confirmed findings carry the request and response, unconfirmed ones are marked and capped in severity | Schedule or on demand | Self-serve for single pentests | Security engineer from Standard level up. Signed-off reports on deeper tests | Self-serve start, human review, data stored in Sweden with AI processing in the EU |
| RunSybil | Nothing surfaces until reproduced independently | Pull requests, schedule or on demand | Demo | Not stated | Login support: SSO, TOTP, magic links, email OTP |
| Escape | Reasoning trace plus the working exploit | Every release and every push through CI/CD | Demo | Not stated | GraphQL, attack surface discovery, CI gates |
| Aikido | Separate agents re-exploit each finding | On demand, or per deploy with Infinite (diff-scoped) | Self-serve, free suite plan | You approve escalations | One vendor for code, cloud and pentest. Fix PRs. EU region |
| Equixly | Grounded in demonstrated exploitability | Continuous in CI/CD (platform plan) | €4,999 single test, platform by quote | Not stated | API-heavy products |
| Novee | Every issue confirmed with steps to replicate | On new deployments and code changes | Demo | Reviewable test plans | Mobile apps, on-prem deployment |
Barrion. Our AI agents pentest web apps and APIs across 8 testing areas and all 97 OWASP WSTG v4.2 cases, logged in as several users. From Standard level up a security engineer reviews the findings, and retests of found issues are free. We don't test internal networks, Active Directory, mobile, physical or social engineering. Essential starts at €199/month, and scheduled pentests come with the Business plan, through sales. Barrion vs XBOW.
Escape and Aikido have their own comparisons: Barrion vs Escape and Barrion vs Aikido.
Network and Active Directory
If your worry is what an attacker can reach once inside your network, XBOW isn't the tool, and neither is Barrion.
- Horizon3.ai NodeZero tests internal and external networks, Active Directory, cloud and Kubernetes, and shows proof of exploit with attack paths. It runs from a Docker host or OVA inside your network, and you can try it free.
- Pentera runs agentless validation of internal networks, the external attack surface, Active Directory and cloud identity. Sold through a demo. Barrion vs Pentera.
PTaaS and human pentesters
When an auditor or customer wants human testers, these add people to the AI.
- Terra Security pairs AI agents with certified pentesters who approve intrusive actions and sign off findings. It covers web apps, networks and AI systems. Barrion vs Terra.
- Cobalt has 500+ vetted pentesters across web, API, network, cloud and AI targets, and an Autonomous Pentest at $3,500 per test until the end of 2026. Barrion vs Cobalt.
- Synack pairs its Sara AI agent with the Synack Red Team, 1,500+ researchers who confirm what Sara finds. Sara pentests start at $4,181.
Open source
Frameworks you run yourself, with your own LLM key. Good for research and for testing your own code, but there's no scheduling, human review or signed report.
- Strix (Apache-2.0) tests web apps, APIs and codebases and says each finding comes with a working proof of concept. A paid cloud version exists.
- Shannon (AGPL-3.0) tests web apps and APIs white-box, reading your source code, and reports only what it could exploit. Its README says not to run it against production.
- PentestGPT (MIT) is a research project aimed at CTFs and pentests of an IP or URL.
All three say to test only systems you own or have written permission to test.
How to choose
- Large portfolio, enterprise budget: stay with XBOW, or compare it with Escape.
- SaaS team that wants to start this week: Barrion or Aikido.
- You need EU data residency today: Barrion (Sweden) or Aikido (EU region).
- You need human pentesters on the report: Terra, Cobalt or Synack.
- Internal network and Active Directory: NodeZero or Pentera.
- Free and hands-on: Strix or Shannon, against a test app you own.
For the full list with every criterion, see best AI pentesting tools. For tools that retest as you ship, see best continuous pentesting tools.
Sources
All sources checked 2026-09-26.
XBOW, platform, pricing, asset types, interpreting results and data residency, checked 2026-09-26
XBOW raises $120M at $1B valuation, SecurityWeek, 2026-03-18, checked 2026-09-26
RunSybil platform, checked 2026-09-26
Escape AI pentesting, checked 2026-09-26
Aikido AI pentest, Aikido Infinite and regions, checked 2026-09-26
Novee, checked 2026-09-26
Horizon3.ai NodeZero and Pentera platform, checked 2026-09-26
Terra Security, Cobalt pricing, Synack pricing and Sara AI pentesting, checked 2026-09-26
Strix, Shannon and PentestGPT on GitHub, checked 2026-09-26
Barrion product facts, facts page, checked 2026-09-26