Open source webmail client for IMAP with address book, search, folders, and a customizable UI via plugins and skins.
7.1k stars1.8k forkslast commit Actively maintained
10 self-hosted Apple Mail alternatives
Built-in email client on macOS, iOS, and iPadOS for sending, receiving and managing email accounts (IMAP, POP, Exchange). Provides search, rules, threaded mailboxes, attachment handling and integration with Apple Contacts and Calendar.
Alternatives to Apple Mail
#2
Lightweight CalDAV/CardDAV server for syncing calendars, to-dos, and contacts with many clients, storing data on the filesystem and supporting auth and TLS.
4.9k stars515 forksGPL-3.0last commit Actively maintained
#3
Modoboa is an open source mail server management platform with a modern web UI, integrating Postfix and Dovecot with admin tools, webmail, calendar, and address book.
3.5k stars476 forksISClast commit Actively maintained
#4
Open source groupware suite providing webmail, calendaring, address books, and shared resources via open standards like IMAP, CalDAV, and CardDAV.
2.1k stars311 forksGPL-2.0last commit Actively maintained
SnappyMail is a fast, modern webmail client (RainLoop fork) focused on performance, privacy, and secure IMAP access with optional PGP support and admin controls.
1.7k stars211 forksAGPL-3.0last commit Actively maintained
Nextcloud Mail is a webmail app that connects to IMAP/SMTP accounts, offering a unified inbox and deep integration with other Nextcloud apps like Contacts and Calendar.
1k stars335 forksAGPL-3.0last commit Actively maintained
#7
Open-source PHP groupware providing CalDAV/CardDAV, ActiveSync, email client, CRM, tasks, file manager and Docker images for on-premise collaboration.
21 stars5 forksAGPL-3.0last commit Actively maintained
Lightweight PHP webmail client for IMAP/SMTP servers, offering a simple interface, plugin extensibility, and broad compatibility with standard mail backends.
Activity unknown
#9
Citadel is an open source groupware and messaging server providing email, calendars, contacts, and a web interface with room-based collaboration.
Activity unknown
#10
Open-source webmail and groupware offering email, contacts, calendar, cloud drive, tasks, notes and an admin control panel for multi-tenant email services.
Activity unknown
What replacing Apple Mail actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 7 of 10 shipped a commit in the last six months. Licences in this list: GPL-3.0, ISC, GPL-2.0, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Webmail Clients.
