# LangSmith vs NVIDIA NeMo Guardrails — Fit & Features

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

Compare LangSmith and NVIDIA NeMo Guardrails by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### 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

### NVIDIA NeMo Guardrails
Define programmable guardrails for conversational AI applications.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- Conversation guardrails
- Safety workflows
- Application integration
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview
- [Read NVIDIA NeMo Guardrails profile](https://trutool.co/tools/nvidia-nemo-guardrails): Read NVIDIA NeMo Guardrails profile