Free, open-source email and calendar client with POP3, IMAP, and news reader support.

Email, calendar, and contact management client with deep Microsoft 365 integration.

Native desktop client for encrypted Proton Mail email and calendar.

Connect Proton Mail's end-to-end encryption to desktop email clients via IMAP/SMTP bridge.

Email client with AI-powered message prioritization and unified inbox management.

Native macOS email client optimized specifically for Gmail accounts.