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Braintrust vs Opik: catalog facts
Braintrust	Opik
Freemium Self-serve sign-up with paid plans listed on the pricing page.	Free The open-source platform is free to self-host.
Web	Web, Self-hosted
Real-time tracing of prompts, responses and tool calls Evals scored by LLMs, code or humans	Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows
Hosted service that requires an account Aimed at teams building LLM products, not individual users	Self-hosting means running several services yourself Contributors must sign a CLA
Hosted service	Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.