Comparison
langfuse vs trulens
langfuse (Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets.) vs trulens (Evaluation and Tracking for LLM Experiments and AI Agents) - live GitHub stats and typed graph relationships, not marketing.
Markdown twin · langfuse alternatives · trulens alternatives
GraphCanon updated today
Tagline
- langfuse
- Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets.
- trulens
- Evaluation and Tracking for LLM Experiments and AI Agents
Stars
- langfuse
- 31k
- trulens
- 3.4k
Forks
- langfuse
- 3.2k
- trulens
- 309
Open issues
- langfuse
- 700
- trulens
- 104
Language
- langfuse
- TypeScript
- trulens
- Python
Adopt for
- langfuse
- Langfuse is an open-source AI engineering platform focused on the evaluation and monitoring of large language models (LLMs), offering a comprehensive set of tools including evaluations, observability features, metrics, a
- trulens
- -
Persona
- langfuse
- -
- trulens
- -
Runtime
- langfuse
- -
- trulens
- -
License
- langfuse
- MIT License
- trulens
- MIT
Last pushed
- langfuse
- Jul 8, 2026
- trulens
- Jun 30, 2026
Categories
- langfuse
- Evaluation & Observability
- trulens
- Evaluation & Observability
Trust and health
Maintenance
- langfuse
- Very active (96%)
- trulens
- Active (82%)
Days since push
- langfuse
- 0d
- trulens
- 7d
Open issues (now)
- langfuse
- 700
- trulens
- 104
Security scan
- langfuse
- No lockfile
- trulens
- Not scanned
Full report
- langfuse
- Trust report
- trulens
- Trust report
Typed relationship
langfuse alternative trulensLangfuse and TruLens both provide evaluation, observability, and monitoring for LLMs. They address similar needs but are developed independently.
Shared compatibility
- Python · langfuse: Python runtime · trulens: Python runtime
Choose langfuse if…
- langfuse is primarily TypeScript; trulens is Python.
- License: langfuse is Other, trulens is MIT.
- Requirements: Requires Docker.
- Langfuse and TruLens both provide evaluation, observability, and monitoring for LLMs. They address similar needs but are developed independently.
- Tags unique to langfuse: evaluation, analytics, llm-observability, open-source.
- langfuse ships Docker support for self-hosted deployment.
- You need detailed observability insights specific to LLMs like tracking usage through integration with OpenTelemetry.
When NOT to use 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.
Choose trulens if…
- trulens is primarily Python; langfuse is TypeScript.
- License: trulens is MIT, langfuse is Other.
- Langfuse and TruLens both provide evaluation, observability, and monitoring for LLMs. They address similar needs but are developed independently.
- Tags unique to trulens: llm-eval, agent-evaluation, ai-monitoring, agentops.
When NOT to use trulens
- Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers.
Explore
langfuse trust report →trulens trust report →Evaluation & Observability category →All comparisonsStack workflowsTrending tools
Related comparisons
Common questions
- What is the difference between langfuse and trulens?
- langfuse: Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets.. trulens: Evaluation and Tracking for LLM Experiments and AI Agents. See the comparison table for live GitHub stats and shared categories.
- When should I choose langfuse over trulens?
- Choose langfuse over trulens when langfuse is primarily TypeScript; trulens is Python; License: langfuse is Other, trulens is MIT; Requirements: Requires Docker; Langfuse and TruLens both provide evaluation, observability, and monitoring for LLMs. They address similar needs but are developed independently; Tags unique to langfuse: evaluation, analytics, llm-observability, open-source; langfuse ships Docker support for self-hosted deployment; You need detailed observability insights specific to LLMs like tracking usage through integration with OpenTelemetry.
- When should I choose trulens over langfuse?
- Choose trulens over langfuse when trulens is primarily Python; langfuse is TypeScript; License: trulens is MIT, langfuse is Other; Langfuse and TruLens both provide evaluation, observability, and monitoring for LLMs. They address similar needs but are developed independently; Tags unique to trulens: llm-eval, agent-evaluation, ai-monitoring, agentops.
- 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 trulens?
- Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers.
- Is langfuse or trulens more popular on GitHub?
- langfuse has more GitHub stars (30,693 vs 3,429). Stars measure visibility, not whether either tool fits your constraints.
- Are langfuse and trulens open source?
- Yes - both are open-source projects on GitHub (langfuse: Other, trulens: MIT).
- Where can I find alternatives to langfuse or trulens?
- GraphCanon lists graph-backed alternatives at /tools/langfuse-langfuse/alternatives and /tools/truera-trulens/alternatives (/tools/langfuse-langfuse/alternatives.md, /tools/truera-trulens/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-truera-trulens.md mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, langfuse or trulens?
- langfuse: Very active. trulens: Active. 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 trulens?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: langfuse: /tools/langfuse-langfuse/trust; trulens: /tools/truera-trulens/trust.