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Resource / Observability
Langfuse
An observability platform for tracing, cost, latency and quality in LLM applications.
Free and open source
The open-source version is self-hostable; the official cloud free tier and quotas must be checked against the current plan.
Quality score
28 / 30
Strong Candidate · Maintenance risk 4/5
Official sources
Last verified: 2026-08-28. A free tier is not a permanent commitment; re-check the official conditions before use.