Alternatives to Xeams for all platforms with any license

Kolab Community

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

Freemium Open Source Linux Web Self-Hosted
CalDAV CardDAV Real time collaboration Support for WebDAV Add a feature

37 Like
Citadel

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...

Free Open Source Linux Web
Real time collaboration Add a feature

6 Like
Microsoft Exchange Server

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

Commercial Windows Web
Email Server Real time collaboration Add a feature

16 Like
iMail

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...

Free Windows Self-Hosted
Email Server Add a feature

3 Like
Axigen

Axigen provides a multi-tenant, fully integrated, multi-platform, all-in-one email, calendaring and collaboration messaging solution. It grants extensive branding...

Commercial Mac Windows Linux BSD Self-Hosted ... Microsoft Office Outlook
API Integration CalDAV CardDAV Delegated Administration ... Support for Docker Email Server Multiple languages Real time collaboration Shared folders White-labeled Add a feature

10 Like
Mercury Mail Transport System

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...

Free Personal Windows
Sync Contacts Custom templates Digital advertising ecosystem Document structure management ... Financial planner Email Server Add a feature

4 Like
Scrollout F1

Scrollout F1 is a free self-hosted email gateway designed for Linux & Windows administrators without advanced email security experience.

Free Open Source Linux Self-Hosted
No features added Add a feature

3 Like
SophiMail

SophiMail is a fully-featured email and collaboration server solving the most critical email issues: maximizes Privacy, Portability and Cost efficiency, Admin & User...

Commercial BSD VirtualBox Self-Hosted VMware vSphere Hypervisor
Daily Backup Indexed search Backup CalDAV ... CardDAV Data portability Encrypted Email Email Server Privacy focused Private messaging Schedule Backup Security focused Selective folder sharing Server Monitoring Shared folders Team Collaboration Two factor authentication Unlimited users Add a feature

7 Like
Blue-Mind

Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with comprehensive, useful, efficient and...

Commercial Linux
ActiveSync Reduce mobile data usage REST API Calendar Sync Add a feature

5 Like
Zarafa

Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and...
- 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."
Commercial Mac Windows Linux Web
Email Server Real time collaboration Add a feature

13 Like
Sanwhole Exchange

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...

Commercial $ $ $ Windows
Email Server Add a feature

1 Like
Poste.io

Full featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.

Free Personal Linux
Support for Docker Email Server Add a feature

2 Like
OpenChange

OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols. Exchange is a groupware server designed to work...

Free Open Source Linux
Email Server Add a feature

7 Like
Expanding Communication

Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaboration, messaging, video conferencing, file...

Commercial Linux
CalDAV Email Server Add a feature

5 Like
PowerMTA

Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and DKIM) to comply with changing ISP...

Commercial Windows Linux Self-Hosted
Email Server Add a feature

1 Like