Compare software

Aster MailMailfence
Freemium

Free plan with 10 GB of storage; paid plans start at $2.99 per month.

 Freemium

A free account is available, with paid plans for more features.

Android Android, iOS, Web
  • Mail is encrypted on the device before it leaves
  • 10 GB free with custom domain support
  • OpenPGP encryption and signing in the browser
  • Standard IMAP, POP and SMTP access
  • The app only works with astermail.org accounts
  • Young project with a small user base compared with established providers
  • Hosted service only
  • Advanced features sit on paid plans
Downloadable app, Hosted service Downloadable app, Web application, Hosted service
Open source Closed source
License: AGPL-3.0 License not stated
Account needed Account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 23, 2026

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