Compare software

MendeleyI, Librarian
Freemium

Free with 2 GB of storage, with paid options.

 Freemium

The open source version is free to self-host; the hosted and professional editions are…

Web, Browser extension Web, Self-hosted
  • PDF reading, highlighting and annotation built in
  • Generates references and citations
  • Imports references from major academic databases
  • Boolean search and bulk tagging for literature reviews
  • Owned by the publisher Elsevier
  • Free storage is limited to 2 GB
  • Needs Apache and PHP when installed manually
  • AI research features belong to the commercial edition
Downloadable app, Web application, Browser extension Self-hosted, Hosted service
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.