A agentindex
Comparison

Lunary vs Comet Opik

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

Lunary

Open-source LLM observability and prompt management.

  • + Lightweight and self-hostable
  • + Clean prompt-management UI
  • − Smaller community
  • − Eval features basic

Comet Opik

Open-source eval and tracing from Comet.

  • + Open source with self-host option
  • + Backed by Comet's MLOps experience
  • − Smaller community than Langfuse
  • − UI less polished than paid rivals
Spec Lunary Comet Opik
Category eval-observability eval-observability
License Apache-2.0 Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing freemium freemium
Starting price Self-host free Self-host free
Models multi multi
Languages typescript python, typescript
GitHub stars — 19.8k
Last activity — 2026-06-25