Compare software

Aster MailTuta Desktop
Freemium

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

 Freemium

A free account with limited storage and one address. Paid plans add custom domains…

Android Windows, macOS, Linux
  • Mail is encrypted on the device before it leaves
  • 10 GB free with custom domain support
  • End-to-end encrypts mail bodies, subject lines, calendar and contacts
  • Password-protected messages to recipients who are not Tuta users
  • The app only works with astermail.org accounts
  • Young project with a small user base compared with established providers
  • No IMAP or SMTP, so third-party mail clients cannot be used
  • A Tuta account is required; it is not a general mail client
Downloadable app, Hosted service Downloadable app
Open source Open source
License: AGPL-3.0 License: GPL-3.0
Account needed Account needed
Not stated if it works offline Needs internet

Checked October 2, 2026

Checked September 21, 2026

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