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AI Tools Scout

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

Letta vs langchain

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

Letta

Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.

Best matched with other agent tools.

23.9K
Stars
+1.3K
Weekly
66/100
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

Letta is currently growing faster at +1.3K stars this week.

Maintenance

langchain 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.

SignalLettalangchain
Evidence statusBasic listing· 2026-10-04 09:17 UTCVerified snapshot· 2026-10-04 09:19 UTC
GitHub stars23.9K147.4K
Weekly growth+1.3K+599
Health scoreHealthy66/100Strong84/100
Contributors1533.7K
Commits per week0.350.5
Open issues49569
LanguagePythonPython
LicenseApache-2.0MIT
Last commit2026-07-22 00:32 UTC2026-10-03 08:31 UTC
Last release0.16.8langchain-core==1.4.0

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