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Lens.org

Free, open patent and scholarly search covering 330M+ records

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The most recently approved AI tools people use as an alternative to Lens.org (Free, open patent and scholarly search covering 330M+ records), newest first.

Zotero
Zotero

Free, open-source reference manager with AI metadata extraction

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Undermind
Undermind

AI research agent that follows citation trails, not just keywords

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Semantic Scholar
Semantic Scholar

Free AI academic search from the Allen Institute for AI

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SciSpace
SciSpace

AI paper reader, formerly Typeset

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Scinapse
Scinapse

Free AI academic search covering 250 million papers

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Productivity Directory
Productivity Directory

Curated directory of AI-powered productivity tools

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Perplexity Labs
Perplexity Labs

Perplexity's experimental features, including Deep Research

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Connected Papers
Connected Papers

Visual map of how academic papers relate to each other

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Explainpaper
Explainpaper

Highlight a confusing paragraph, get a plain-language explanation

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Iris.ai
Iris.ai

AI research engine for scientific literature at enterprise scale

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