# Welcome to promptfoo! promptfoo is a CLI and library for evaluating LLM output quality. Use it to improve your prompts and test different models. Have a question? Open a thread in #1156983037905600543 Have feedback or an idea to make promptfoo better? Share it in #1156982555791331378 Resources - [Documentation](https://promptfoo.dev/docs/intro) - [Github](https://github.com/promptfoo/promptfoo)