Compare software

Microsoft OutlookBlueMail
Freemium

Free app and account available; Microsoft 365 plans add paid features and Office apps.

 Freemium

The client is free to download. Some features are reserved for paid plans.

Windows, macOS, Android, iOS, Web Windows, macOS, Linux, iOS
  • Email, calendar and contacts for multiple accounts in one app
  • Available on desktop, mobile and web
  • One inbox covers many accounts across Windows, macOS, Linux, Android and iOS with a consistent interface and shared…
  • Closed source and tied to Microsoft services
  • Some features, including Copilot, require a paid plan
  • It is closed source, some features need a paid plan, and its handling of account credentials has drawn…
Downloadable app, Web application 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 September 23, 2026

Checked September 22, 2026

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