These tools competes with
LangfusevsWeights & Biases
OSS LLM engineering platform versus ML experiment tracking and LLM evaluation
Compare interactively in Explore →Choose Langfuse when…
- •You want open-source LLM observability
- •Self-hosting your tracing stack is important
- •You need cost tracking across models and users
Choose Weights & Biases when…
- •You're running ML experiments alongside LLM work
- •Model training tracking and artifact management are needed
- •You're a data scientist who uses Weights & Biases already
Side-by-side comparison
Field
Langfuse
Weights & Biases
Category
LLM Infrastructure
Prompt & Eval
Type
Open Source
Commercial
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Cloud: $59/mo
Teams: $50/user/mo
GitHub Stars
⭐ 7,000
—
Langfuse
Open-source platform for tracing, evaluations, and prompt management. Self-hostable alternative to LangSmith with clean UX.
Weights & Biases
Industry-standard ML experiment tracking platform with LLM-specific tools for prompt evaluation, fine-tuning monitoring, and dataset versioning.
Shared Connections1 tools both integrate with
Only Langfuse (26)
CursorClaude CodeOpenHandsCrewAIAutoGenLangGraphLangChainLlamaIndexDifyMastra
Only Weights & Biases (1)
Langfuse
Explore the full AI landscape
See how Langfuse and Weights & Biases fit into the bigger picture — 123 tools, 304 relationships, all mapped.