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Weights & Biases vs Opik: catalog facts
Weights & Biases	Opik
Freemium Offers free use with paid plans for teams.	Free The open-source platform is free to self-host.
Web	Web, Self-hosted
Experiment tracking and comparison in one dashboard Covers both classic ML training and LLM tracing	Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows
Requires an account and sends data to a hosted service Proprietary platform	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
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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