Pick MLflow Tracing if
teams already on MLflow who will run Tracing locally at $0 (uvx mlflow demo or their own server) — not Weave first unless they want W&B Pro $60.
Read the MLflow Tracing pageMLflow Tracing vs W&B Weave
Our take
Pick MLflow Tracing if you're on a team already on MLflow who will run Tracing locally at $0 (uvx mlflow demo or their own server) — not Weave first unless they want W&B Pro $60. 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.
Best for
MLflow Tracing LLM traces next to the MLflow you already run, at $0
W&B Weave LLM traces under the same W&B account at a public $
Free plan
MLflow Tracing $0 · local / your server. You bring machines
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
MLflow Tracing Not published by the vendor
W&B Weave Pro $60/mo, monthly only
Runs where
MLflow Tracing Hosted
W&B Weave Hosted
Watch out
MLflow Tracing $0 is the OSS server, not your warehouse
W&B Weave Pro ingest overage is $0.10/MB (~$100/GB)
Last checked
MLflow Tracing 2026-10-27 · mlflow.org/docs/latest/genai
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