Promptfoo

Open-source LLM security and evaluation platform.

San Francisco, CA, USA
Founded 2024

Promptfoo is an open-source CLI and library for evaluating and red-teaming LLM applications, providing automated security testing and vulnerability scanning for AI systems. The platform helps developers and enterprises build secure, reliable AI applications by detecting risks like prompt injection, data leakage, and insecure tool use.

Last Updated: July 31, 2025

Current Valuation

$110M

as of July 30, 2025 (Source)

Funding Summary

$23.6M

Total reported funding

Key People

Ian Webster
CEO & Co-founderFounder
LinkedIn Profile
Michael D'Angelo
CTO & Co-founderFounder
LinkedIn Profile

Core OSS Projects

Open-source CLI and library for evaluating and red-teaming LLM applications with automated security testing and vulnerability scanning

License: MIT

Open-source CLI and library for evaluating and red-teaming LLM applications with automated security testing and vulnerability scanning

License: MIT

Business Information

Category

Red Teaming

Industries

Software

Technologies

AI SecurityLLM Testing

Sectors

EnterpriseDevelopers

Licenses

MIT

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