Promptfoo
An open-source tool and platform for red teaming, security testing and evaluating LLM applications; being acquired by OpenAI.
About Promptfoo
AI apps can leak data or be manipulated, and teams need to test for that before release.
Who it’s for
- Security and AI engineering teams
- Developers testing prompts and agents
When to consider it
Consider Promptfoo when you want automated red teaming and evals you can run locally and in CI.
Tradeoffs & limitations
- OpenAI announced in March 2026 that it is acquiring Promptfoo; the open-source tool continues.
SOTA overview · Documentation-based assessment · Sources & review method
Updates
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Comparisons & guides
Sources & review method
Documentation-based assessment · Oct 2, 2026 · Prepared with AI assistance; not a hands-on benchmark.
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
Promptfoo official website
An open-source tool and platform for red teaming, security testing and evaluating LLM applications; being acquired by OpenAI.
Based on official pages and announcements checked on 2026-10-02. No hands-on test, performance benchmark or popularity ranking is claimed.