Alternatives to Kerio Connect for all platforms with any license

Zoho

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

Free Personal Web
CRM Leadfeeder integration Add a feature

139 Like
G Suite

G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It...

Commercial Mac OS X Windows Linux Web Chrome OS
Team Collaboration Add a feature

111 Like
Microsoft Office 365

Office 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or cloud-based use. For consumers, the service allows the...

Commercial Web
IFTTT integration Real time collaboration Add a feature

17 Like
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.

Commercial Open Source Web DAVdroid
CalDAV CardDAV Real time collaboration Add a feature

40 Like
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...

Commercial Linux Web
ActiveSync Real time collaboration Add a feature

28 Like
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...

Free Open Source Windows
Convert images to PDF POP3 Support Add a feature

22 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
CalDAV CardDAV Delegated Administration Support for Docker ... Multiple languages Real time collaboration Shared folders White-labeled Add a feature

9 Like
Kopano

Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface. Kopano helps you work smarter with people within and outside...

Commercial Mac OS X Windows Linux Web Android ... iPhone Android Tablet Windows Phone iPad Microsoft Office Outlook S/MIME
CalDAV On-premises software POP3 Support Real time collaboration ... Shared calendars Add a feature

24 Like
IceWarp

IceWarp integrates all communication & collaboration features in one unified solution. Available in cloud or for on-premises deployment, IceWarp is a great tool to...

Commercial Windows Linux Web
File-sync Group chat Integrated File Sharing Outlook integration ... Real time collaboration Shared calendars 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 CalDAV CardDAV ... Data portability Privacy focused Private messaging Schedule Backup Security focused Selective folder sharing Shared folders Team Collaboration Two factor authentication Unlimited users Add a feature

6 Like
- 1) SophiMail ensures Data Portability and DR by delivering a server-side Daily Backup on a trusted location, in interoperable, structured format. 2) SophiMail guarantees 100% Uptime, via hybrid deployment with dual active servers 3) SophiMail facilitates ISPs, VARs and any Admin, by offering easy control of multiple domains and locations at a glance. It brings all domains in one screen, through a powerful dashboard. markhachman • Jul 2017
OBM

OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

Free Open Source Mac OS X Windows Linux
CalDAV Real time collaboration Add a feature

3 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
No features added Add a feature

3 Like
atmail

Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage, synchronisation and provisioning. ...

Commercial Mac OS X Windows Linux Android iPhone ... Android Tablet iPad
On-premises software Add a feature

1 Like
eGroupWare

Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and task management, project and file...

Free Open Source Linux Web
No features added Add a feature

7 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
Real time collaboration Add a feature

15 Like