A agentindex
Comparison

Fiddler vs SigNoz

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

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 Fiddler SigNoz
Role Observability Observability
Tags observability, guardrails, persona-platform-engineer observability, persona-platform-engineer
License Proprietary MIT
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 go, typescript
GitHub stars — 27.6k
Last activity — 2026-07-03