promptfoo

Promptfoo: LLM evals & red teaming

promptfoo is a developer-friendly local tool for testing LLM applications. Stop the trial-and-error approach - start shipping secure, reliable AI apps.

Quick Start

# Install and initialize project
npx promptfoo@latest init

# Run your first evaluation
npx promptfoo eval

See Getting Started (evals) or Red Teaming (vulnerability scanning) for more.

What can you do with Promptfoo?

• Test your prompts and models with automated evaluations
• Secure your LLM apps with red teaming and vulnerability scanning
• Compare models side-by-side (OpenAI, Anthropic, Azure, Bedrock, Ollama, and more)
• Automate checks in CI/CD
• Share results with your team

Here's what it looks like in action:

It works on the command line too:

It also can generate security vulnerability reports:

Why promptfoo?

• 🚀 Developer-first: Fast, with features like live reload and caching
• 🔒 Private: Runs 100% locally - your prompts never leave your machine
• 🔧 Flexible: Works with any LLM API or programming language
• 💪 Battle-tested: Powers LLM apps serving 10M+ users in production
• 📊 Data-driven: Make decisions based on metrics, not gut feel
• 🤝 Open source: MIT licensed, with an active community

Learn More

• 📚 Full Documentation
• 🔐 Red Teaming Guide
• 🎯 Getting Started
• 💻 CLI Usage
• 📦 Node.js Package
• 🤖 Supported Models

Contributing

We welcome contributions! Check out our contributing guide to get started.

Join our Discord community for help and discussion.