Langfuse
Actively maintainedOpen-source LLM engineering platform for tracing, evals, prompt management and observability.
Stars
★ 33k
Version
v4.6.0
Last commit
1 day, 18 hours ago
Language
TypeScript
Metrics verified from the source repo on Aug 7, 2026.
What it is
Open-source LLM engineering platform for tracing, evals, prompt management and observability.
Replaces
LangSmith
Self-host Langfuse instead of paying for the above.
Highlights
- LLM tracing & observability
- prompt management
- evaluations (LLM-as-a-judge)
- LLM playground
- datasets
Recent changes
- Aug 7 version Version: v4.5.0 → v4.6.0
- Aug 6 version Version: v4.4.0 → v4.5.0
- Aug 5 version Version: v4.3.1 → v4.4.0
- Aug 5 notable_features Highlights: '' → 'LLM tracing & observability, prompt management, evaluations (LLM-as-a-judge), LLM playground, datasets'
