I curated 48 LLM observability tools (Langfuse, Phoenix, Opik, LangSmith…) + a comparison matrix
Every few weeks I end up re-comparing LLM observability/eval tools for a project, so I put it all in one place: 48 verified tools across tracing, evals, prompt mgmt, gateways, OTel instrumentation, and guardrails, each with current stars + license; plus a self-host / license / tracing / evals / OTel comparison table for the top platforms.
It also includes original agent skills (instrument tracing, add evals, debug-from-traces, PII-safe tracing for regulated apps) and a minimal OpenTelemetry GenAI tracer.
Full disclosure, it's my org's repo (CC0, contributions welcome): https://github.com/ContextJet-ai/awesome-llm-observability — what tool am I missing?
u/nishchaymahor19 — 16 hours ago