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Promptfoo

Free

CLI tool for testing and evaluating LLM outputs with red-teaming support.

Open SourceAPISelf-hostedTypeScript SDK

Tool Info

Categories
Evaluation
Developer
Promptfoo
License
Open Source
Official Website
www.promptfoo.dev
Repository
promptfoo/promptfoo
Official Docs

Overview

Promptfoo evaluates LLM outputs systematically with configurable test cases.

Supports comparing prompts across models in CI pipelines.

Pricing

Free tier available
Free (open source)

Pros

  • CLI-first workflow
  • CI/CD integration
  • Red-team plugins

Best For

Prompt regression testingModel comparisonRed-teaming

When NOT to Use

  • Config-heavy
  • Less runtime observability

Community Insights

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Alternatives

DeepEval
Open-source LLM evaluation framework with 50+ metrics and CI integration.
LangFuse
Open-source LLM engineering platform for tracing, evals, and analytics.

Tags

#evaluation#testing#red-team

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