Free Microsoft Exchange Server Alternatives
The best free alternative to Microsoft Exchange Server is Kopano, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Microsoft Exchange Server and 19 is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Microsoft Exchange Server are hMail Server (Free, Open Source), mailcow: dockerized (Free, Open Source), Zimbra Collaboration Suite (Freemium, Open Source) and Kolab Community (Freemium, Open Source).
- Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface. View 25 alternatives to Kopano
- Freemium • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- Windows Phone
- iPad
- Self-Hosted
- Microsoft Office Outlook
- S/MIME
- Software as a Service (SaaS)
Kopano vs Microsoft Exchange Server
hn1 Kopano has scalable backend and can do full MAPI server and clientside. The Webapp and Deskapp has intuitive and modern UI/UX.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.marcski Stable and cheap backend, flexible frontend support, open source, in full control of your databobsp Scalable, open source with a great UX and it has all the features I needOpenSource, better to maintain, "not Microsoft" - 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. View 25 alternatives to hMail Server
- Free • Open Source
- Windows
- 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. View 16 alternatives to mailcow: dockerized
- Free • Open Source
- Linux
- Self-Hosted
- Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. View 44 alternatives to Zimbra Collaboration Suite
- Freemium • Open Source
- Linux
- Online
- Self-Hosted
- Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite. View 41 alternatives to Kolab CommunityNo screenshots yet
- Freemium • Open Source
- Linux
- Online
- Self-Hosted
- SOGo is groupware server with a focus on scalability and open standards. View 65 alternatives to SOGo
- Freemium • Open Source
- Linux
- Online
- Thunderbird
- Cloudron
- A 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. View 67 alternatives to iRedMail
- Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. View 17 alternatives to Citadel
- MailEnables mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows. View 10 alternatives to MailEnable
- 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)... View 27 alternatives to Sendmail