Last updated: 2026-08-26
Allen Institute's free academic search engine: 200M+ papers with AI-generated TLDRs, influence-weighted citations and open APIs the whole research-tools ecosystem builds on.
Visit Semantic Scholar →Free, fast, and smarter than raw search. Highly-influential-citation counts beat crude tallies, TLDRs speed scanning, and the API powers half the other tools on this list. As the neutral starting point for any literature dig, it's unbeatable at the price.
Completely free, including API access at reasonable rate limits.
It's a search engine, not an assistant — extraction, tables and Q&A live in the tools built on top. Coverage of humanities and non-English work is thinner.
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