Your own workspace. A self-hosted, open source alternative to Google Workspace: mail, drive, docs, sheets, slides, calendar and chat.
Netherlands
EU
+9
Free Microsoft Exchange AlternativesMail Servers and other similar apps like Microsoft Exchange
The best free alternative to Microsoft Exchange is eigen, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Microsoft Exchange and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Microsoft Exchange are mailcow: dockerized, Infomaniak kSuite, Kolab and SOGo.
Alternatives list
- 54 eigen alternatives
27 mailcow: dockerized alternativesmailcow 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
94 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 typeApplication types
Since
- Since 2022
Switzerland
+6
64 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.
Canada
25 hMail Server alternativeshMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
16 grommunio alternativesgrommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
- Germany
- EU
22 OX App Suite alternativesThe 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.
- Germany
- EU
+6
A privacy-first, all-in-one ecosystem that replaces Google Workspace and Creative Cloud. Features encrypted email, cloud storage, and docs, alongside a browser-based 3D animation engine and AI assistant. Your data stays yours.
Cost / License
- Freemium
- Proprietary
Since
- Since 2026
United States
+9
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
69 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.
