Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative we ...

Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts ...

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 ...

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

SOGo is groupware server with a focus on scalability and open standards. SOGo provides a rich AJAX-based Web interface and sup ...

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the followin ...

Office 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or cloud-based use ...

iMail - Business and School Ultimate Free Mail Solution Web-client access, LAN or WAN self-hosted server, maintenance-free des ...

Kolab Now, formerly MyKolab, is a fully featured secure collaboration and communication service that is easy to use on any dev ...

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

A fully fledged, free email server solution, an open source project (GPL v2).

Use official binary packages from Linux/BSD dist ...

SophiMail is a fully-featured email and collaboration server, ideal for private hosting: on cloud, on premises or hybrid.

Solv ...

Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Lo ...

Zoho is an all-in-one online office suite. Zoho geares itself towards businesses, increasing your productivity and offering e ...

Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate ...