Alternatives to Microsoft Office 365 for all platforms with any license

ONLYOFFICE

ONLYOFFICE is an opensource office and productivity suite that enables you to manage documents, projects, team and customer relations in one place. ONLYOFFICE is...

Freemium $ $ $ Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted
Compatible with Microsoft Office Multiple languages Works Offline Real time collaboration ... White-labeled Add a feature

230 Like
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

140 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 Windows Linux Web Chrome OS
Team Collaboration Add a feature

111 Like
Open365

The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE. Improve your productivity and communicate better with your team members. The world is...

Free Open Source Android Self-Hosted
Cloud sync Add a feature

28 Like
- Discontinued The project seems to be no longer developed. Last commit on the GitHub repo was made on June 27th, 2016, but it can be still downloaded and installed.
Kolab Community

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

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

36 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
Samepage

With Samepage, you can put all your project information on one page and collaborate with your team in real time. Samepage brings together an entire suite of project...

Freemium Mac Windows Web
Group chat Collaborative writing Content Templates File-sync ... Group Messaging Real time collaboration Team Collaboration Add a feature

77 Like
Microsoft SharePoint

Microsoft Office SharePoint Server is an integrated suite of server capabilities that can help improve organizational effectiveness by providing comprehensive content...

Commercial Windows Web Android iPhone Windows Phone
Real time collaboration Add a feature

23 Like
MDaemon Messaging Server

Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for companies that want control of their email. Integrated web-mail with doc...

Commercial Windows
Dropbox integration Encrypted email Group chat Support for IMAP ... Outlook integration Add a feature

14 Like
Kerio Connect

Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate, secure access to your communications...

Commercial Mac Windows Linux Web
Sync Contacts POP3 Support Sync Calendars Add a feature

7 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 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
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
No features added Add a feature

7 Like
Atmail Email Server

Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook ...

Commercial Linux Web
File-sync Group Mail Add a feature

7 Like