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TwobirdSpark Mail
Free

No pricing is listed on the homepage.

 Freemium

Free for individuals; paid plans add AI features and team tools.

macOS Windows, macOS, Android, iOS
  • Notes, reminders and to-dos inside the inbox
  • Collaborative notes within conversations
  • Automatic inbox categorization cuts down on manual sorting
  • AI-drafted replies can speed up routine email responses
  • Site gives few details on supported platforms and email providers
  • AI and team features are gated behind a paid plan
  • Some categorization requires manual correction over time
Downloadable app Downloadable app
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 Not stated if it works offline

Checked October 2, 2026

Checked September 22, 2026

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