Tools · SPBoucher
Menu

Directory

3 tools

Results

Crossref

Crossref · Research dissemination

Membership organization that registers DOIs for scholarly content and exposes the metadata through a free public REST API, content negotiation and the paid Metadata Plus service

ProprietaryFreePaidNov 2, 2026

Google Scholar

Google (Chrome DevTools team) · Literature discovery & review

Free scholarly search engine from Google that indexes articles, theses, books and court opinions with citation counts and author profiles

ProprietaryFreeNov 2, 2026

Semantic Scholar

Allen Institute for AI (Ai2) · Literature discovery & review

Free AI-assisted literature search from Ai2 with an Academic Graph API, recommendations and downloadable datasets of papers, authors and citations

ProprietaryFreeNov 2, 2026

Page 1 of 1

Share this view: /tools?category=academic-discovery&source=proprietary&pricing=free