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

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

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

16 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...

Freemium 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

POP3 Support Add a feature

21 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...

Free 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 Disagree   Agree

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

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

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

Do you think these apps are alternatives?

• Axigen

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

  api caldav calendaring carddav delegated-administration

  

  YES NO