Promptfoo (acquired by OpenAI)

promptfoo

CLI and library for testing and red teaming LLM apps and agents against config-defined test cases and assertions.

MITTypeScriptv0.124.1

What it supports

  • Evaluates multi-step agents and tool calls: supportedEvaluates multi-step agents and tool callsDocs
  • LLM as a judge scoring: supportedLLM as a judge scoringDocs
  • Tracing: supportedTracingDocs
  • Runs in CI: supportedRuns in CIDocs

Install

npm install promptfoo

Links

Official documentationgithub.com/promptfoo/promptfooHosted option: Promptfoo EnterprisePricing

Other eval frameworks

Inspect AIDeepEvalPydantic EvalsHarborLangfuseOpikMLflow GenAI EvaluationArize PhoenixW&B WeaveRagasGoogle ADK EvaluationBraintrustLangSmith EvaluationMicrosoft Foundry EvaluationsGen AI Evaluation Service

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Reviewed Oct 9, 2026.