mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
Germany
EU
+3
Free Microsoft Exchange Alternatives for Linux
Microsoft Exchange is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best free Linux alternative is mailcow: dockerized, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Microsoft Exchange and 14 are free and available for Linux so hopefully you can find a suitable replacement. Other interesting free Linux alternatives to Microsoft Exchange are Kolab, Infomaniak kSuite, SOGo and grommunio.
Alternatives list
- 23 mailcow: dockerized alternatives
79 Infomaniak kSuite alternativesSuite for secure email, calendaring, file sharing, chat, and online meetings, offering real-time collaboration on docs, GDPR compliance, customizable branding, renewable energy use, advanced user management, and all data hosted in Switzerland.
Cost / License
- Free Personal
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
+6
61 SOGo alternativesSOGo is groupware server with a focus on scalability and open standards.
SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.
grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
Cost / License
- Freemium
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Self-Hosted
grommunio vs Microsoft Exchange Comments
norbertlambingAs the first open source solution to offer a full-featured OutlookAnywhere (RPC over HTTP) and MAPI/HTTP implementation, grammm is the alternative to proprietary backends for native interoperability with Microsoft Outlook
- grommunio is Freemium and Open Source
- grommunio is Privacy focused
The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.
Cost / License
- Free
- Open Source
Application types
Platforms
- Linux
- Online
- Self-Hosted
- Software as a Service (SaaS)
+6
- 18 Citadel alternatives
Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel platform for the Internet, the Citadel/UX developers added functionality such as shared calendars, instant...
C 
66 iRedMail alternativesA fully fledged, free email server solution, an open source project (GPL v2).
Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.
Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.
Works on both no.
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
19 Poste.io alternativesFull featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.
+3
Web-based team collaboration suite combining email client, calendar, contact and task tools, CRM, project and file management, file sharing, trouble tickets, Rocket.Chat chat, and Collabora online editing. Offers open source, self-hosted, and SaaS options.
Cost / License
- Freemium
- Open Source (GPL-2.0)
Application types
Platforms
- Linux
- Online
- Self-Hosted
- Software as a Service (SaaS)
+6
Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
Switzerland
Canada
United States
Great Activesync Support POOR and I mean VERY Poor Calendar that has a mind of It's own, setting events or reminders is a NIGHTMARE