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VC-funded Company:

Promptfoo
1405 S Delaware St.
San Mateo, CA 94402
Phone: 914-722-7429
https://www.promptfoo.dev/

Promptfoo is the most widely adopted open source AI security testing platform, enabling enterprises to identify and remediate vulnerabilities in their AI systems before deployment. Founded in 2024, the company's tools are used by over 100,000 developers worldwide, while its enterprise platform secures AI applications for Fortune 500 companies across retail, telecommunications, finance, and media.

Key Contact
Name
Ian Webster
Title
Co-Founder & CEO
Funding Events

Date
Amount
Type
Investors
Valuation
07/29/25 $18,400,000 Series A Andreessen Horowitz
Insight Venture Partners
undisclosed