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Spark MailMeron
Freemium

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

 Free

Free and open source under the AGPL-3.0 licence.

Windows, macOS, Android, iOS Windows, macOS, Linux, Android, iOS
  • Automatic inbox categorization cuts down on manual sorting
  • AI-drafted replies can speed up routine email responses
  • Kanban board view for organising mail
  • Chat-style threads in a unified inbox
  • AI and team features are gated behind a paid plan
  • Some categorization requires manual correction over time
  • Conversation-style layout differs from traditional mail clients
  • Newer project with a smaller user base
Downloadable app Downloadable app
Closed source Open source
License not stated License: AGPL-3.0-or-later
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 1, 2026

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