Pick Langfuse if
teams shipping LLM apps who need traces and a cost tile, not another chat UI.
Read the Langfuse pageLangfuse vs W&B Weave
Our take
Pick Langfuse if you're on a team shipping LLM apps who need traces and a cost tile, not another chat UI. Pick W&B Weave if you're on a teams already on W&B who will stay on Free at $0 (5 model seats, 5 GB storage, 1 GB Weave ingest) while they open a first Traces table, then Pro at $60/month when they need team and 1.5 GB ingest. Skip Langfuse if you're people who only want a gateway (LiteLLM) or a framework
Best for
Langfuse Debug and cost-track generations
W&B Weave LLM traces under the same W&B account at a public $
Free plan
Langfuse $0 · for the MIT core. ee/ is not the community license
W&B Weave $0 · /month. Up to 5 model seats. 5 GB/mo storage. 1 GB/mo Weave ingestion. Tracing, evals, scorers. Community support
Lowest paid
Langfuse Enterprise $2/mo
W&B Weave Pro $60/mo, monthly only
Next step up
Langfuse Core $29/mo
W&B Weave
Runs where
Langfuse Local or hosted
W&B Weave Hosted
Watch out
Langfuse Hobby is two users and 30-day retention
W&B Weave Pro ingest overage is $0.10/MB (~$100/GB)
Last checked
Langfuse 2026-10-19 · langfuse.com/pricing
W&B Weave 2026-10-27 · wandb.ai/site/pricing
Which one, then?
Pick W&B Weave if
teams already on W&B who will stay on Free at $0 (5 model seats, 5 GB storage, 1 GB Weave ingest) while they open a first Traces table, then Pro at $60/month when they need teams and 1.5 GB ingest.
Read the W&B Weave page