A agentindex
Comparison

Fiddler vs Lunary

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Fiddler

AI observability and governance for enterprise.

  • + Strong governance and compliance story
  • + Good for regulated enterprise
  • − Enterprise-priced
  • − Heavier than dev-focused tools

Lunary

Open-source LLM observability and prompt management.

  • + Lightweight and self-hostable
  • + Clean prompt-management UI
  • − Smaller community
  • − Eval features basic
Spec Fiddler Lunary
Role Observability Observability
Tags observability, guardrails, persona-platform-engineer observability, prompt-management, persona-platform-engineer
License Proprietary Apache-2.0
Open source No Yes
Self-hostable No Yes
MCP support No No
Pricing paid freemium
Price Custom Free tier
Usage cost No model cost No model cost
Models multi multi
Languages python typescript
GitHub stars — —
Last activity — —