# DeepEval vs LangSmith — Fit & Features

Canonical: https://trutool.co/compare/deepeval-vs-langsmith
Author: Snehil (https://trutool.co/authors/snehil)

Compare DeepEval and LangSmith by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### DeepEval
Test LLM application outputs with evaluation metrics and regression checks.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- LLM evaluations
- Test datasets
- Regression testing
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://deepeval.com
- [Read DeepEval profile](https://trutool.co/tools/deepeval): Read DeepEval profile

### LangSmith
Observe, evaluate, and deploy AI agents across supported frameworks.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- Agent tracing
- Evaluation workflows
- Agent deployment
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://www.langchain.com/pricing
- [Read LangSmith profile](https://trutool.co/tools/langsmith): Read LangSmith profile