Last updated: 7 November 2026. Facts are vendor claims checked on that date; nothing was tested independently.

Gray Swan

Combines automation with a large crowd of human red teamers, and works on frontier-model pre-release testing.

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What it tests

Claimed on the vendor's own pages. Nothing here was tested independently.

• Agent / tool abuse
• Tool, MCP, API and file access

Framework mappings

None named on the pages opened. None named.

Offering

• Shade: automated attack agents.
• Cygnal: runtime blocking.
• Arena: a crowdsourced red-teaming community with cash prizes.

Pricing

Not public. Not public. Free tier: none stated. See what AI red teaming costs.

Ownership history

Independent. A Carnegie Mellon spinout; a $40M Series A was announced on 2026-05-28.

Alternatives

Three vendors with a similar offering type and overlapping coverage. Chosen by category and claimed coverage, then alphabetically; no ranking is implied.

• Adversa AI

  Both (platform + service) Independent (VC-backed)

  A research-heavy specialist offering continuous red teaming, with an audit that it says covers the full OWASP LLM Top 10.

• Mindgard

  Both (platform + service) Independent

  A research-rooted vendor offering both continuous automated testing and expert engagements. It names the widest set of frameworks of the independents, including EU AI Act Article 55.

• Lakera

  Both (platform + service) Acquired by Check Point

  A GenAI application security specialist, with Guard for runtime and Red for testing, now part of a large network security vendor. It offers both automated and expert-led red teaming.