Microsoft Exchange Server Alternatives

Microsoft Exchange Server is described as 'Messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions' and is a Mail Server in the social & communications category. There are more than 25 alternatives to Microsoft Exchange Server for a variety of platforms, including Linux, Web-based, Windows, Mac and Self-Hosted apps. The best Microsoft Exchange Server alternative is Google Workspace. It's not free, so if you're looking for a free alternative, you could try mailcow: dockerized or Kolab Community. Other great apps like Microsoft Exchange Server are Zimbra Collaboration Suite, Kopano, Kolab Now and Zentyal.

Microsoft Exchange Server alternatives are mainly Mail Servers but may also be WebMail Providers or Calendar Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft Exchange Server.

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Microsoft Exchange Server

Paid • Proprietary
Mail Server

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the...

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OBM
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
WebMail Provider
Calendar App
Mac
Windows
Linux
21 OBM alternatives
OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.
Suggest and vote on features
OBM Features
1. Real time collaborationMultiple users can work together in OBM simultaneously.
CalDAV Support
Discontinued
The GitHub repository has been archived and the last update was in 2017.
EGroupware
Is this is a good alternative?
Yes
No
Freemium • Open Source
Mail Server
Calendar App
Project Management Tool
Linux
Online
Self-Hosted
Software as a Service (SaaS)
24 EGroupware alternatives
Online Collaboration with Chat and Online Office. Is developed as open source software in Germany, offered as free community version and as commercial version. Operation as self-hosted or as SaaS from the computer centre.
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EGroupware Features
1. Real time collaborationMultiple users can work together in EGroupware simultaneously.
2. Kanban BoardEGroupware allows you to organize your workflow by moving cards with drag-and-drop functionality between multiple columns.
Document sharing
Remote Work
Web-Based
CalDAV Support
RDP
WebDAV Support
CardDAV Support
Calendar Sync
Customizable
Zarafa
Is this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Calendar App
Mac
Windows
Linux
Online
15 Zarafa alternatives
Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and stable Outlook sharing (100% MAPI).
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Zarafa Features
1. Real time collaborationMultiple users can work together in Zarafa simultaneously.
Discontinued
"Last year we released the announcement that Zarafa customers could transition to Kopano. We also announced that Zarafa would not be maintained beyond May 1st, 2017. Most ZCP customers have moved to a Kopano subscription now."
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Atmail Email Server
Is this is a good alternative?
Yes
No
Paid • Proprietary
Email Client
WebMail Provider
Mail Server
Linux
Online
67 Atmail Email Server alternatives
Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.
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Atmail Email Server Features
Group Mail
Mercury Mail Transport System
Is this is a good alternative?
Yes
No
Free Personal • Proprietary
Mail Server
Windows
19 Mercury Mail Transport System alternatives
The Mercury Mail Transport System is a mail server that sends and receives messages on behalf of a group of users on a machine or local area network. Messages from the outside world are received by Mercury and delivered to the users, who can access it at any later point.
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Mercury Mail Transport System Features
Financial planner
Sync Contacts
Custom templates
Document structure management
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MailEnable
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Mail Server
WebMail Provider
Windows
10 MailEnable alternatives
MailEnables mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows.
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MailEnable Features
SMTP Support
IMAP Support
POP3 Support
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iMail
Is this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
WebMail Provider
Windows
Self-Hosted
42 iMail alternatives
Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for commercial use.
iMail has no features, suggest some!
Sanwhole Exchange
Is this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Windows
42 Sanwhole Exchange alternatives
Sanwhole Exchange is a server running iMail, iPress and iStore services. iMail is an enterprise-class email server does Microsoft Exchange and Gmail work. iPress sets blog, forums and tickets in one. iStore is an online store.
Sanwhole Exchange has no features, suggest some!
Expanding Communication
Is this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Email Client
Linux
34 Expanding Communication alternatives
Turnkey Solutions for the Enterprise Cloud

Installation, Configuration, and Management tools for enterprise email, collaboration, messaging, video conferencing, file sharing, and file transfers.
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Expanding Communication Features
1. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
Contacts
CalDAV Support
Cloud based
Video Conferencing
CardDAV Support
atmail
Is this is a good alternative?
Yes
No
Paid • Proprietary
WebMail Provider
Email Client
Mac
Windows
Linux
Android
iPhone
Android Tablet
iPad
26 atmail alternatives
Atmail provides services providers with email solutions.
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atmail Features
On-premises software