# Guardrails AI vs Lunary — Fit & Features

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

Compare Guardrails AI and Lunary 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

### Lunary
Monitor AI conversations and manage prompts for LLM applications.
Best fit: AI engineers testing agent quality and monitoring production behavior.
- LLM monitoring
- Prompt management
- Conversation analytics
Before you choose: Use representative test cases and inspect evaluator failures. Check trace retention, sensitive-data handling, and usage costs.
Pricing: https://lunary.ai/pricing
- [Read Lunary profile](https://trutool.co/tools/lunary): Read Lunary profile