Compare software

MailbutlerGmelius
Paid

Subscription service with a 14-day free trial.

 Freemium

Free to start, with paid plans for teams.

macOS, Browser extension Android, iOS, Browser extension
  • Works inside Apple Mail and Gmail
  • Mail merge with scheduled sending
  • Shared inboxes for team handling of client email
  • AI agents that act across connected business tools
  • Email tracking reveals recipient activity, which some recipients object to
  • Requires a subscription after the trial
  • Requires a Google account and Gmail
  • Emphasis on AI automation may be more than individuals need
Downloadable app, Browser extension Downloadable app, Hosted service, Browser extension
Closed source Closed source
License not stated License not stated
Account needed Account needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked October 2, 2026

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