Promptfoo — open-source AI Infrastructure

Updated 2026-09-03 · tool · AI Infrastructure · rev 1 · structured JSON

Eval + red-teaming; CI-friendly (verified)

• Open source: yes (MIT)
• Self-hostable: yes
• Pricing model: free
• Best for: Developer-first teams building and securing LLM applications who need to test prompts, evaluate models, and find vulnerabilities locally.
• Last verified: 2026-09-04

Is Promptfoo open source?

Yes, Promptfoo is open source under the MIT license.

How much does Promptfoo cost?

Promptfoo is free to use.

Can I self-host Promptfoo?

Yes, Promptfoo can be self-hosted (the source is available under the MIT license).

• Source: github · github.com/promptfoo
• Repository: https://github.com/promptfoo/promptfoo

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