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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

Promptfoo vs langchain

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

Promptfoo

Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

Best matched with other agent tools.

23.5K
Stars
+2.3K
Weekly
90/100
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

Promptfoo is currently growing faster at +2.3K stars this week.

Maintenance

Promptfoo has the stronger automated maintenance signal at 90/100. 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.

SignalPromptfoolangchain
Evidence statusBasic listing· 2026-10-04 09:17 UTCVerified snapshot· 2026-10-04 09:19 UTC
GitHub stars23.5K147.4K
Weekly growth+2.3K+599
Health scoreStrong90/100Strong84/100
Contributors3203.7K
Commits per week74.750.5
Open issues437569
LanguageTypeScriptPython
LicenseMITMIT
Last commit2026-07-22 17:02 UTC2026-10-03 08:31 UTC
Last release0.121.19langchain-core==1.4.0

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