Braintrust

Braintrust is the enterprise platform for LLM evaluation, experimentation, and observability — used by Notion, Airtable, and Stripe to ship AI features with confidence through systematic eval-driven development.
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Braintrust · LLM eval · observability · AI experimentation · prompt eval · AI ops · LLMOps · LLM evaluation · prompt engineering · AI eval · developer tools · free tier