A agentindex
Comparison

Arize Phoenix vs SigNoz

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

Arize Phoenix

Open-source LLM tracing and eval.

  • + Open source with OTel foundations
  • + Good LLM-as-a-judge evals built in
  • − Elastic license restricts some hosted offerings
  • − Enterprise features in the paid Arize cloud

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 Arize Phoenix SigNoz
Category eval-observability eval-observability
License Elastic-2.0 MIT
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing free freemium
Starting price Self-host free Self-host free
Models multi multi
Languages python, typescript go, typescript
GitHub stars 10.3k 27.5k
Last activity 2026-06-25 2026-06-25