A agentindex
Comparison

Langfuse vs SigNoz

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

SigNoz

Open-source OpenTelemetry observability.

  • + Unified app and LLM tracing on OTel
  • + Fully self-hosted, no vendor lock-in
  • − LLM evals via OpenLLMetry, not native
  • − More ops to run than a SaaS
Spec Langfuse SigNoz
Category eval-observability eval-observability
License MIT MIT
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 go, typescript
GitHub stars 29.8k 27.5k
Last activity 2026-06-25 2026-06-25