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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

Prompt Engineering Guide vs Mem0

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

Prompt Engineering Guide

🐙 Guides, papers, lessons, notebooks and resources for prompt engineering, context engineering, RAG, and AI Agents.

Best matched with other interface tools.

78.8K
Stars
+742
Weekly
53/100
Health
Mem0

Universal memory layer for AI Agents

Best matched with other interface tools.

61.5K
Stars
+6.0K
Weekly
92/100
Health

Quick Take

Adoption

Prompt Engineering Guide has the larger GitHub footprint with 78.8K stars.

Momentum

Mem0 is currently growing faster at +6.0K stars this week.

Maintenance

Mem0 has the stronger automated maintenance signal at 92/100. 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.

SignalPrompt Engineering GuideMem0
Evidence statusBasic listing· 2026-10-04 09:18 UTCBasic listing· 2026-10-04 09:18 UTC
GitHub stars78.8K61.5K
Weekly growth+742+6.0K
Health scoreWatch53/100Strong92/100
Contributors212385
Commits per week0.027.1
Open issues288707
LanguageMDXTypeScript
LicenseMITApache-2.0
Last commit2026-03-11 20:09 UTC2026-07-22 16:04 UTC
Last releaseN/Acli-node-v0.2.11

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