Promptfoo is a technology company.
Promptfoo has raised $23.0M across 2 funding rounds.
Promptfoo has raised $23.0M in total across 2 funding rounds.
Promptfoo is a San Francisco-based AI security company that builds an open-source platform for testing and securing generative AI applications against vulnerabilities like prompt injection, data leaks, and jailbreaks.[1][3][4] It serves developers, security teams, and enterprises—including over 85 Fortune 500 companies such as Shopify, Amazon, Anthropic, and Fidelity—by automating red teaming, continuous monitoring, and remediation workflows integrated into CI/CD pipelines and developer tools.[1][3][5] The platform solves the critical gap in AI security where traditional code scanners fail against conversational AI risks, enabling safe deployment of chatbots, agents, and complex systems with real-time threat intelligence from a 200,000+ developer community.[1][3] Growth has accelerated with 200,000+ users, a July 2025 $18.4M Series A led by Insight Partners (following a $5M seed), and expansions like Model Context Protocol (MCP) integration.[1][2][4]
Founded in 2024 by CEO Ian Webster and a team of security and engineering practitioners who scaled generative AI to hundreds of millions of users, Promptfoo emerged from the need for robust testing tools missing in early AI deployments.[1][2][5] Webster, drawing from front-line experience, identified risks in security, safety, legal compliance, and policy as AI shifted from code to conversation-based systems.[1] The idea gained traction via its open-source framework, quickly adopted by 25,000+ engineers at top firms; pivotal moments include the 2024 seed raise, rapid community growth to 150+ contributors from OpenAI, Google, and Microsoft, and the 2025 Series A to fuel enterprise scaling.[2][4][5]
Promptfoo rides the explosive growth of generative AI and agentic systems, where enterprises demand secure, production-ready deployments amid rising vulnerabilities in LLMs, RAG pipelines, and multi-agent workflows.[1][4] Timing is ideal post-2024 AI boom, as regulations and incidents amplify needs for automated security—traditional tools falter, but Promptfoo's conversational red teaming fills the void, influencing standards like continuous AI evaluation akin to software DevOps.[1][3][4] Market tailwinds include surging Global 2000 AI adoption and open protocols like MCP from Anthropic; it shapes the ecosystem by open-sourcing tools that 200,000+ developers use, fostering innovation while enabling "intelligence-first design" in secure enterprise stacks.[1][4][5]
Promptfoo is poised to dominate AI security as the "CI/CD for AI," with upcoming features like test-driven prompt development and enhanced agent tracing meeting demands for autonomous systems.[1][4] Trends like multi-agent proliferation, stricter compliance, and real-time observability will propel growth, potentially expanding to full-stack AI governance. Its influence may evolve from open-source pioneer to infrastructure standard, backed by elite investors like Insight Partners and a16z, solidifying trust in generative AI at scale.[1][4][5]
Promptfoo has raised $23.0M in total across 2 funding rounds.
Promptfoo's investors include Abstract Ventures, Kevin Hartz, Andreessen Horowitz, C2 Investment, Framework Ventures, Greylock, Human Capital, Insight Partners, Pantera Capital, Paradigm, Seed Club Ventures, Sweater Ventures.
Promptfoo has raised $23.0M across 2 funding rounds. Most recently, it raised $18.0M Series A in July 2025.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Jul 1, 2025 | $18.0M Series A | Abstract Ventures, Kevin Hartz, Andreessen Horowitz, C2 Investment, Framework Ventures, Greylock, Human Capital, Insight Partners, Pantera Capital, Paradigm, Seed Club Ventures, Sweater Ventures, Village Global, Aaron Levie, Arash Ferdowsi, Balaji Srinivasan, Charlie Cheever, Christina Cacioppo, Chuck Eesley, Dylan Field, Frederic Kerrest, Gokul Rajaram, Jawed Karim, John Collison, Julia Hartz, Mark Cuban, Tobias Lutke, Varsha Rao | |
| Jul 1, 2024 | $5.0M Seed | AIX Ventures, Boldstart Ventures, C2 Investment, DTCP, Flex Capital, Innovation Endeavors, IVP, Maven Ventures, The Hit Forge, Y Combinator, Amjad Masad, Balaji Srinivasan, Bob Muglia, Dylan Field, Jeff Bezos, Mattia Astori, Peter Sonsini, Shane Neman, Stanley Druckenmiller, Stewart Butterfield, Yann LeCun |