Gray Swan builds an AI security platform that combines real-time protection (Cygnal), automated adversarial testing/red-teaming (Shade), and a global red-teaming community (Arena) to detect and prevent dangerous model and agent behavior. Cygnal enforces custom enterprise policies in real time, while Shade runs automated pre-deployment adversarial tests as part of CI/CD, and Arena crowdsources attacks from more than 15,000 researchers to generate over one million attack trajectories. The company says its benchmarks are embedded in the safety evaluation processes of leading frontier labs and that it is cited in 11 recent frontier model system cards, including those from Anthropic, OpenAI, and Meta. Gray Swan works with over 20 customers and has partnerships with platforms such as Snowflake, including a native integration for runtime AI protection. The recent $40M Series A will fund go-to-market scaling, deeper lab and platform partnerships, and team growth to support enterprise deployments.

Total raised

$40M

Funding rounds

1

Latest round

Series A

Latest activity

Jun 2026