Agenta

Agenta is an open-source platform for building reliable LLM applications. It offers a playground where you can compare prompts and models, and then turn the winner into a versioned configuration your app can fetch. Evaluation tools let engineers and subject experts score outputs together, and observability shows how the app behaves in production. The goal is to bring product people, domain experts and developers into one workflow. You can self-host Agenta for free or use the cloud plans. It is a good fit for teams who want an open alternative with collaboration built in.