Zimbra Collaboration alternatives and similar software solutions

Based on the "Groupware" category.

SuiteCRM

8.4 8.9 Zimbra Collaboration VS SuiteCRM

SuiteCRM - Open source CRM for the world
EspoCRM

6.3 9.9 Zimbra Collaboration VS EspoCRM

EspoCRM open source CRM application

Access the most powerful time series database as a service

Ingest, store, & analyze all types of time series data in a fully-managed, purpose-built database. Keep data forever with low-cost storage and superior data compression.

Promo www.influxdata.com

Sogo

6.3 9.5 L1 Zimbra Collaboration VS Sogo

SOGo is a very fast and scalable modern collaboration suite (groupware). It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (IMAP, CalDAV, CardDAV, etc.) and thereby provides native connectivity (without plugins) to many clients such as Microsoft Outlook, Apple iCal, the iPhone, Mozilla Lightning, and a plethora of mobile devices.
Corteza

5.5 9.9 Zimbra Collaboration VS Corteza

Low-code platform
Mayan EDMS

5.4 8.6 L3 Zimbra Collaboration VS Mayan EDMS

Free Open Source Document Management System (mirror, no pull request or issues)
Openmeetings

5.3 6.7 L2 Zimbra Collaboration VS Openmeetings

Mirror of Apache Openmeetings
Horde

4.1 0.0 L3 Zimbra Collaboration VS Horde

This is the old, deprecated, monolith Horde repository, archived here for historical reasons.
egroupware

3.8 9.9 L1 Zimbra Collaboration VS egroupware

Web based groupware server written in PHP, forum at https://help.egroupware.org/
HRCloud2

3.2 0.0 Zimbra Collaboration VS HRCloud2

A full-featured home hosted Cloud Drive, Personal Assistant, App Launcher, File Converter, Streamer, Share Tool & More!
Tine 2.0

3.1 9.8 Zimbra Collaboration VS Tine 2.0

Tine 2.0 main repository
Cozy Cloud

2.1 0.0 L1 Zimbra Collaboration VS Cozy Cloud

A cozy client application to configure and run cozy konnectors
BlueMind

- Zimbra Collaboration VS BlueMind

Groupware with email, calendar, addressbooks, exchange active sync, exchange "mapi" protocol support.
Kolab

- Zimbra Collaboration VS Kolab

Kolab community is a unified communication and collaboration system
Kopano

- Zimbra Collaboration VS Kopano

Groupware suite including e-mail, calendars, tasks, todos and notes. Featuring a modern WebApp, DeskApp and mobile access over Z-Push/ActiveSync.