These tools competes with
LangSmithvsWeights & Biases
LLM tracing, evaluation, and dataset management versus ML experiment tracking and LLM evaluation
Compare interactively in Explore →Choose LangSmith when…
- •You're already in the LangChain ecosystem
- •You want end-to-end tracing for LangChain apps
- •Dataset management and evals are part of your workflow
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
LangSmith
Weights & Biases
Category
LLM Infrastructure
Prompt & Eval
Type
Commercial
Commercial
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Plus: $39/mo
Teams: $50/user/mo
GitHub Stars
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Health
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LangSmith
LangChain's observability platform. Trace every LLM call, run evals on datasets, and manage prompts in production.
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 LangSmith (8)
LangGraphLangChainCursorPydanticAIBraintrustHeliconeWeights & BiasesAgentOps
Only Weights & Biases (1)
LangSmith
Explore the full AI landscape
See how LangSmith and Weights & Biases fit into the bigger picture — 207 tools, 452 relationships, all mapped.