# Guardrails AI vs Langfuse — Fit & Features

Canonical: https://trutool.co/compare/guardrails-ai-vs-langfuse
Author: Snehil (https://trutool.co/authors/snehil)

Compare Guardrails AI and Langfuse by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### Guardrails AI
Validate LLM inputs and outputs using configurable guardrails.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- Output validation
- Input checks
- Validator library
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://guardrailsai.com/
- [Read Guardrails AI profile](https://trutool.co/tools/guardrails-ai): Read Guardrails AI profile

### Langfuse
Trace, evaluate, and improve LLM applications with an open-source engineering platform.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- LLM tracing
- Prompt management
- Evaluation datasets
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://langfuse.com/pricing
- [Read Langfuse profile](https://trutool.co/tools/langfuse): Read Langfuse profile