# OpenLIT vs W&B Weave — Fit & Features

Canonical: https://trutool.co/compare/openlit-vs-w-b-weave
Author: Snehil (https://trutool.co/authors/snehil)

Compare OpenLIT and W&B Weave by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### OpenLIT
Instrument AI applications using open-source OpenTelemetry observability.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- LLM observability
- Cost tracking
- OpenTelemetry integration
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://openlit.io/pricing
- [Read OpenLIT profile](https://trutool.co/tools/openlit): Read OpenLIT profile

### W&B Weave
Trace and evaluate generative AI applications with a developer toolkit.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- LLM tracing
- Evaluation datasets
- Experiment comparison
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://docs.coreweave.com/products/wandb/weave
- [Read W&B Weave profile](https://trutool.co/tools/w-b-weave): Read W&B Weave profile