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An open-source AI tools directory with clear use cases, visible source freshness, and maintenance evidence for anyone deciding what to try.

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Rankings use public ecosystem signals. Treat them as a starting point, then confirm license, setup, safety, and fit with the upstream project.
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Project comparison

Langfuse vs langchain

Compare adoption, momentum, maintenance health, and project basics before choosing which tool to evaluate deeper.

Langfuse

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

Best matched with other agent tools.

31.7K
Stars
+4.7K
Weekly
84/100
Health
langchain

The agent engineering platform.

Best matched with other agent tools.

147.4K
Stars
+599
Weekly
84/100
Health

Quick Take

Adoption

langchain has the larger GitHub footprint with 147.4K stars.

Momentum

Langfuse is currently growing faster at +4.7K stars this week.

Maintenance

Langfuse has the stronger automated maintenance signal at 84/100. This is not a security or fit verdict.

Side-by-side evidence

Use these signals to narrow your choice, then confirm setup, license, and fit upstream.

SignalLangfuselangchain
Evidence statusBasic listing· 2026-10-04 09:17 UTCVerified snapshot· 2026-10-04 09:19 UTC
GitHub stars31.7K147.4K
Weekly growth+4.7K+599
Health scoreStrong84/100Strong84/100
Contributors1943.7K
Commits per week93.850.5
Open issues716569
LanguageTypeScriptPython
LicenseNOASSERTIONMIT
Last commit2026-07-22 16:56 UTC2026-10-03 08:31 UTC
Last releasev3.224.0langchain-core==1.4.0

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