Key milestones and important events in this wiki's history
1st January 2024
Promptfoo was founded by Ian Webster and Michael D'Angelo to create a platform for developers to systematically test and secure AI applications.
1st July 2025
Raised $18.4 million in a Series A funding round led by Insight Partners, with participation from Andreessen Horowitz, reaching a valuation of $85.5 million.
1st March 2026
OpenAI announced its acquisition of Promptfoo to integrate its security technology and bolster the safety of its enterprise-grade AI agent platforms.