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GPG SuiteFlowCrypt
Freemium

Downloads are free; the GPG Mail extension needs a paid yearly support plan after a 30-day…

 Freemium

Free extension for individuals, with paid business plans listed on the pricing page.

macOS Browser extension
  • Encrypt, sign and verify files and messages on a Mac
  • GPG Keychain app for managing OpenPGP keys
  • Works inside the normal Gmail interface
  • Encrypts both messages and attachments
  • macOS only
  • GPG Mail requires a paid subscription
  • Built around Gmail rather than other mail providers
  • Business features require a paid plan
Downloadable app Browser extension
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked September 24, 2026

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