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Braintrust vs Weights & Biases: catalog facts
Braintrust	Weights & Biases
Freemium Self-serve sign-up with paid plans listed on the pricing page.	Freemium Offers free use with paid plans for teams.
Web	Web
Real-time tracing of prompts, responses and tool calls Evals scored by LLMs, code or humans	Experiment tracking and comparison in one dashboard Covers both classic ML training and LLM tracing
Hosted service that requires an account Aimed at teams building LLM products, not individual users	Requires an account and sends data to a hosted service Proprietary platform
Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account 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.