langfuse vs langtrace

Common questions

What is the difference between langfuse and langtrace?

langfuse: Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets.. langtrace: Langtrace 🔍 Open Telemetry based end-to-end observability tool for LLM applications. See the comparison table for live GitHub stats and shared categories.

When should I choose langfuse over langtrace?

Choose langfuse over langtrace when License: langfuse is Other, langtrace is AGPL-3.0; Requirements: Requires Docker; Graph edge: langfuse is a typed related of langtrace - see the relationship row above; Tags unique to langfuse: evaluation, analytics, llm-observability, open-source; You need detailed observability insights specific to LLMs like tracking usage through integration with OpenTelemetry.

When should I choose langtrace over langfuse?

Choose langtrace over langfuse when License: langtrace is AGPL-3.0, langfuse is Other; Graph edge: langtrace is a typed related of langfuse - see the relationship row above; Tags unique to langtrace: llmops, llm-framework, evaluations, ai.

When should I avoid langfuse?

You require a proprietary solution that offers specialized features not available in open-source tools like Langfuse. Your team is strictly bound to use technologies exclusively from major vendors and cannot accommodate external open-source dependencies. The existing toolset in your tech stack does not benefit from integrations with OpenTelemetry, LangChain or the OpenAI SDK.

When should I avoid langtrace?

Last GitHub push was 233 days ago (slowing maintenance, Nov 17, 2025). Validate activity before betting a new project on langtrace. Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers.

Is langfuse or langtrace more popular on GitHub?

langfuse has more GitHub stars (30,693 vs 1,213). Stars measure visibility, not whether either tool fits your constraints.

Are langfuse and langtrace open source?

Yes - both are open-source projects on GitHub (langfuse: Other, langtrace: AGPL-3.0).

Where can I find alternatives to langfuse or langtrace?

GraphCanon lists graph-backed alternatives at /tools/langfuse-langfuse/alternatives and /tools/scale3-labs-langtrace/alternatives (/tools/langfuse-langfuse/alternatives.md, /tools/scale3-labs-langtrace/alternatives.md), ranked by typed relationship edges rather than popularity votes.

Is there a machine-readable version of this comparison?

Yes. The markdown twin at /compare/langfuse-langfuse-vs-scale3-labs-langtrace.md mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.

Which is better maintained, langfuse or langtrace?

langfuse: Very active. langtrace: Slowing. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.

Where are the full trust reports for langfuse and langtrace?

GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: langfuse: /tools/langfuse-langfuse/trust; langtrace: /tools/scale3-labs-langtrace/trust.