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, Online / Web-based, Windows, Self-Hosted solutions and Mac. The best alternative is Kopano. It's not free, so if you're looking for a free alternative, you could try hMail Server or mailcow: dockerized. Other great apps like Microsoft Exchange Server are Google Workspace, Zentyal, Kolab Community and Zimbra Collaboration Suite.

Microsoft Exchange Server alternatives are mainly Mail Servers but may also be Calendar Apps or WebMail Providers. 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

Windows
Online

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

Learn more about Microsoft Exchange Server

Kopano
Is this a good alternative?
Yes
No
Paid • Open Source
Mail Server
Email Client
Mobile Device Management (MDM) Tool
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
Windows Phone
iPad
Self-Hosted
Microsoft Office Outlook
S/MIME
Software as a Service (SaaS)
25 alternatives to Kopano
Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
Suggest and vote on features
Kopano Features
1. Real time collaborationMultiple users can work together in Kopano simultaneously.
On-premises software
Shared Calendar
CalDAV Support
IMAP Support
S/MIME Support
POP3 Support
Kopano vs Microsoft Exchange Server
Almost everyone thinks Kopano is a great alternative to Microsoft Exchange Server.
Karunamon
Free and open source, and has most of the things you want from Exchange, including shared calendars.
Top positive comment• ago

0

hn1
Kopano has scalable backend and can do full MAPI server and clientside. The Webapp and Deskapp has intuitive and modern UI/UX.
Top positive comment• ago

0

marcski
Stable and cheap backend, flexible frontend support, open source, in full control of your data
Positive comment• ago

0

bobsp
Scalable, open source with a great UX and it has all the features I need
Positive comment• ago

0

Guest
OpenSource, better to maintain, "not Microsoft"
Positive comment• ago

-1

Guest
I tried a lot of MS alternatives, OX, Zimbra, Zentyal, but what fits most with Outlook Sync was the new Kopano, it's more flexible. You can use the web app or desktop app too.
Positive comment• ago

-1
Google Workspace
Is this a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Team Collaboration Tool
Calendar App
Mac
Windows
Linux
Online
Chrome OS
48 alternatives to Google Workspace
Google Workspace (formerly Google Apps for Work / G Suite) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It features traditional office tools through Google Docs as well as communication and time...
Suggest and vote on features
Google Workspace Features
1. Sync with Google CalendarGoogle Workspace can be synchronized with Google Calendar
2. Two-factor AuthenticationGoogle Workspace supports two-factor authentication (2FA).
Online collaboration
Google contacts integration
Sync with Google Drive
Google Sheets integration
Integrated Bulk Emailing
Google Workspace vs Microsoft Exchange Server
Some users think Google Workspace is a great alternative to Microsoft Exchange Server, some don't.
hMail Server
Is this a good alternative?
Yes
No
Free • Open Source
Mail Server
Windows
25 alternatives to hMail Server
hMailServer 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.
Suggest and vote on features
hMail Server Features
IMAP Support
Convert images to PDF
SMTP Support
POP3 Support
Discontinued
hMail Server is no longer supported by the people who created it and has been discontinued – so use it at your own risk.

hMail Server vs Microsoft Exchange Server
Almost everyone thinks hMail Server is a great alternative to Microsoft Exchange Server.
mailcow: dockerized
Is this a good alternative?
Yes
No
Free • Open Source
Mail Server
Linux
Self-Hosted
18 alternatives to mailcow: dockerized
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.
Suggest and vote on features
mailcow: dockerized Features
Self hosted mail
Support for Docker
ActiveSync
Dockerized
Modular System
Zentyal
Is this a good alternative?
Yes
No
Paid • Open Source
Mail Server
Linux Distro
Linux
28 alternatives to Zentyal
Zentyal is a native Microsoft Active Directory implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure Server.
Suggest and vote on features
Zentyal Features
Gateway
Member Directory
Web interface
Zentyal vs Microsoft Exchange Server
Some users think Zentyal is a great alternative to Microsoft Exchange Server, some don't.
Guest
No Exchange alternative and no support for MS Outlook Client
Negative comment• ago

7

Guest
While the comments below suggest that this is AD, not exchange replacement. It was supposed to ship with SoGo / openchange as a managed add-on. You also strangely enough can't have exchange without AD. but guests do keep on posting. Exchange is just an Add-On to AD. (It extends the schema).
Positive comment• ago

0

Guest
They do not share any common functionality. Zentyal is an Active Directory substitute, Microsoft Exchange is a groupware E-Mail (enterprise grade) server.
Negative comment• ago

-3

Guest
Not an Exchange alternative at all. Does basic AD but that is about it. It is more of a gateway server.
Negative comment• ago

-1
Kolab Community
Is this a good alternative?
Yes
No
Freemium • Open Source
Linux
Online
Self-Hosted
42 alternatives to Kolab Community
Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
Suggest and vote on features
Kolab Community Features
1. Real time collaborationMultiple users can work together in Kolab Community simultaneously.
CalDAV Support
WebDAV Support
IMAP Support
CardDAV Support
Add a screenshot

Kolab Community vs Microsoft Exchange Server
Most users think Kolab Community is a great alternative to Microsoft Exchange Server.
Zimbra Collaboration Suite
Is this a good alternative?
Yes
No
Freemium • Open Source
Mail Server
Calendar App
Team Collaboration Tool
Linux
Online
Self-Hosted
43 alternatives to Zimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Suggest and vote on features
Zimbra Collaboration Suite Features
1. Real time collaborationMultiple users can work together in Zimbra Collaboration Suite simultaneously.
ActiveSync
Active Directory integration
Zimbra Collaboration Suite vs Microsoft Exchange Server
Most users think Zimbra Collaboration Suite is a great alternative to Microsoft Exchange Server.
SOGo
Is this a good alternative?
Yes
No
Freemium • Open Source
WebMail Provider
Linux
Online
Thunderbird
Cloudron
64 alternatives to SOGo
SOGo 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.
Suggest and vote on features
SOGo Features
Support for Multiple Users
Scheduling
CalDAV Support
CardDAV Support
Kolab Now
Is this a good alternative?
Yes
No
Paid • Open Source
Calendar App
Mail Server
Cloud Storage Service
Online
Software as a Service (SaaS)
DAVdroid
78 alternatives to Kolab Now
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
Suggest and vote on features
Kolab Now Features
1. Support for AliasesKolab Now supports aliases, so you can receive email without exposing your main email address
2. Real time collaborationMultiple users can work together in Kolab Now simultaneously.
3. Privacy focusedKolab Now is considered a privacy friendly alternative.
4. End-to-End EncryptionKolab Now has E2E Encryption, for entire or parts of the app.
CalDAV Support
WebDAV Sync
CardDAV Support
Kolab Now vs Microsoft Exchange Server
Some users think Kolab Now is a great alternative to Microsoft Exchange Server, some don't.
Guest
With Microsoft no longer supporting our existing setup, this was a great alternative.
Positive comment• ago

2
OX App Suite
Is this a good alternative?
Yes
No
Free • Open Source
Mail Server
WebMail Provider
Calendar App
Linux
Online
Self-Hosted
Software as a Service (SaaS)
20 alternatives to OX App Suite
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.
Suggest and vote on features
OX App Suite Features
1. Real time collaborationMultiple users can work together in OX App Suite simultaneously.
2. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
3. Calendar IntegrationOX App Suite lets you sync your tasks and events with your calendar application.
Personal Information Manager (PIM)
Group Mail
German
WebDAV Support
WebDAV Sync