Monitoring & Observability
🎯 LangSmith vs Weights & Biases
Community Vote — Which tool wins?
LangSmith
Tool ATracing, evaluation, and observability for LLM apps and agents.
Starting Price
Paid + Free tier
Key Strengths
- ✓Best-in-class LLM tracing and debugging platform
- ✓Deep integration with LangChain ecosystem
- ✓Powerful evaluation and testing workflows for prompt development
Weights & Biases
Tool BExperiment tracking and model evaluation used in agent development.
Starting Price
Free + Paid
Key Strengths
- ✓Experiment comparison and visualization capabilities are unmatched — parallel coordinate plots, metric distributions, and run comparisons across thousands of experiments
- ✓Unified platform for both traditional ML training and LLM evaluation eliminates tool sprawl for teams doing both
- ✓W&B Tables provide collaborative data exploration with filtering, sorting, and custom visualizations of evaluation results
Which would you choose for...
Vote in each scenario below