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PaperpileBookends
Paid

Paid subscription with a 30-day free trial.

 Paid

Commercial software sold through the developer's site.

Android, iOS, Web, Browser extension macOS, iOS
  • Built-in PDF viewer with annotation tools
  • Citation plugins for Google Docs and Word
  • Imports from many academic databases
  • Citation tools for Word, Mellel and Nisus Writer Pro
  • Requires a Google account
  • Sign-up only on Chrome for now, Safari and Firefox in beta
  • Mac and iOS only
  • Paid, unlike Zotero
Downloadable app, Web application, Browser extension Downloadable app
Closed source Closed source
License not stated License not stated
Account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked October 2, 2026

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