Promptfoo

Promptfoo discovers and eliminates major LLM risks before they are shipped to production. Its founders have experience launching and scaling AI to over 100M users using automated red-teaming and testing to overcome security, legal, and compliance issues. Promptfoo's open-source, developer-first approach has made it the most widely adopted tool in this space, with over 20,000 users at companies like Shopify, Amazon, and Anthropic.