{"name":"Langfuse","tagline":"Open-source LLM observability — traces, prompts, evals; MIT self-host or Cloud from Hobby.","url":"https://langfuse.com","category":"dev-infra","pricing":"freemium","price_note":"self-host OSS free (MIT); Cloud Hobby $0 (50k units/mo, 2 users); Core $29/mo; Pro $199/mo; Enterprise from $2,499/mo; overage from $8/100k units","free_tier":true,"open_source":true,"api":true,"self_host":true,"verdict":"situational","verdict_text":"langfuse.com is live (the 404 rumor is stale). Cloud is unit-metered (traces + observations + scores); Hobby is a real free POC; Core at $29 is the production on-ramp. Self-host OSS is full core features, Enterprise is the RBAC/audit layer plus ClickHouse commercial. Not a field install here.","limitations":["A \"unit\" is every trace, span, generation, and score — verbose agents get expensive.","Hobby hard-caps at 50k units and 2 users; no overage.","SSO/RBAC on Cloud is Pro+$300 Teams add-on or Enterprise, not Core.","Self-host Enterprise pricing is additive to ClickHouse Cloud/BYOC."],"strengths":["MIT-licensed self-host option with full core observability features.","Cloud Hobby is a real free POC for small teams.","Covers traces, prompts, evals, and unit-metered usage in one tool."],"use_for":["Teams that need LLM observability and can self-host for compliance.","Small POCs that fit inside Hobby's 50k units and 2 users."],"skip_when":["Verbose agents would blow through the per-unit meter quickly.","You need SSO/RBAC without paying Pro, Teams add-on, or Enterprise.","You expect overage on the free Hobby tier."],"receipts":["https://langfuse.com/pricing","https://langfuse.com/pricing-self-host","https://github.com/langfuse/langfuse"],"affiliate":"none","evidence_tier":"source-verified","momentum":"blueshift","featured":false,"data_sensitivity":{"trains_on_inputs":"unknown","local_processing":true},"last_verified":"2026-08-19","observed_by":"whysanesanders","slug":"langfuse","canonical_url":"https://noemium.com/tools/langfuse/","attribution":"Noemium catalog data is licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). See https://noemium.com/method/ for how entries are verified."}