A agentindex
Comparison

Langfuse vs Lunary

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

Langfuse

The most-used open-source LLM observability tool.

  • + Open source and self-hostable
  • + Framework-agnostic via OpenTelemetry
  • − Self-hosting ClickHouse is operational work
  • − Eval features trail dedicated eval tools

Lunary

Open-source LLM observability and prompt management.

  • + Lightweight and self-hostable
  • + Clean prompt-management UI
  • − Smaller community
  • − Eval features basic
Spec Langfuse Lunary
Category eval-observability eval-observability
License MIT Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing freemium freemium
Starting price Self-host free; cloud tier Self-host free
Models multi multi
Languages python, typescript typescript
GitHub stars 29.8k —
Last activity 2026-06-25 —