The best AI red teaming companies, compared
0 vendors that attack your models, apps and agents before someone else does. Picked by what you need tested, with every fact sourced and the current owner on every profile.
- ✓ 0 sources linked
- ✓ Rankings are never sold
- ✓ Reviewed November 9, 2026
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Coverage matrix: all 0 vendors
A check means the vendor says it offers that, with a source on its profile.
| Vendor | Human-led engagements | Automated platform | Agents and tools | Frontier model safety | Runtime guardrails | Crowdsourced | OWASP | ATLAS |
|---|
Guides for buyers
- What AI red teaming isAttack classes, scope and how an engagement runs.
- What it costsPrice ranges with sources, and what drives them.
- How to choose a vendorA checklist built on OWASP's vendor criteria.
- Rules that require itEU AI Act, NIST, ISO 42001 and US policy.
- Open-source toolsgarak, PyRIT, Promptfoo and more.
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Common questions
What is AI red teaming?
Testing an AI model, app or agent the way an attacker would: trying prompt injection, jailbreaks, data exfiltration, tool misuse and harmful outputs, then reporting what broke and how to fix it. It can be done by people, by automated tools, or both.
How is AI red teaming different from a pen test?
A pen test looks for flaws in software and infrastructure. AI red teaming targets the model's behavior and the way an app or agent uses it, such as instructions hidden in retrieved documents or an agent calling a tool it shouldn't. Most teams need both.
Is AI red teaming required by law?
For the largest general-purpose AI models in the EU, adversarial testing is an obligation under Article 55 of the AI Act. In the US there is no general mandate for private companies. Our regulations guide covers the details and dates.
How much does AI red teaming cost?
Almost no vendor publishes prices. Ranges cited by vendors themselves run from a few thousand dollars for a narrow test to six figures a year for larger programs. Our cost guide lists the sources.
Why does it matter who owns the vendor?
Many AI security startups were bought by large security companies in 2024 to 2026. That can change pricing, product focus and how independent a test is, especially if you also buy that company's other products. We list the owner on every profile.
Who pays for this site?
Vendors can buy clearly labeled sponsored listings at a flat monthly price. That never changes our picks or tables, and we take no commission on contracts.