Top 15 Citadel Alternative and Similar Softwares | Apr 2024

1. 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....... TpSort Score | 14,300,000

2. OX Open-Xchange

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.Open-Xchange Server 6 is superior in the following areas:• Open-Xchange Server 6 offers most comprehensive Groupwarefunctionality based on modern user interface technologies and includesemail, calendaring, contact management, intelligent document sharing,“smart linking” and much more.• The architecture is designed for...... TpSort Score | 19,100,000

3. Alinto

Established in January 2000, Alinto is one othe principal french editors and operators of collaborative messaging and unified communications. Alinto manages over 4000 areas of professional messaging and more than a million users in 5 countries. Alinto relies on a team that has expertise in electronic communication for over fifteen...... TpSort Score | 28,500,000

4. Zarafa

Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and stable Outlook sharing (100% MAPI)....... TpSort Score | 155,000

5. Wimi

Wimi is the ultimate productivity tool. It integrates all the essential applications to facilitate teamwork. Wimi saves time to managers and entrepreneurs working with teams and clients.Wimi includes many worthy functionnalities :- file sharing - multi-device and cloud synchronization for documents- fine access right management- task management- calendar sync and...... TpSort Score | 28,600,000

6. 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 boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.Other key advantages include advanced compatibility with existing desktop email clients,...... TpSort Score | 60,700

7. Qortex

Qortex is a web-based next-generation platform for collaboration and knowledge-building within your group or company.Special features are: use chat with your client, save into Qortex and share it there. Convert chats to posts to wiki entries for knowledge building. Share groups/folders with other companies/organizations. Full WYSIWYG editor for writing, or...... TpSort Score | 28,500,000

8. eXo Platform

eXo Platform is a cloud-ready enterprise portal and user experience platform-as-a-service (UXPaaS) for building and deploying transactional websites, managing web and social content and creating gadgets and dashboards. Built on open standards and open source technologies, eXo Platform has the features and extensibility of a UXP and the cloud architecture...... TpSort Score | 1,390,000

9. Qlubb

Qlubbs are the easiest way to communicate and share with other families in your childs classroom...... TpSort Score | 194,000,000

10. Blue-Mind

Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with comprehensive, useful, efficient and effective tools....... TpSort Score | 2,650,000

11. GroupSpaces

Free group website, membership database, listserv mailing list, payments and more - GroupSpaces is a market leader in online group management software, providing comprehensive, simple to use tools to help manage your group more quickly and efficiently. Easy-to-use, secure & time-saving. Used by 10 000s of membership groups. Try it...... TpSort Score | 28,500,000

12. phlyMail

phlyMail is an advanced webmail and groupware solution featuring unlimited profiles, multiple users, a calendar, contacts list and much more...... TpSort Score | 186,000,000

13. Axigen

Axigen is an integrated email, calendaring & collaboration platform, built on a unique Linux mail server technology, for increased speed & security....... TpSort Score | 3,020,000

14. Hall

Real-time chat & texting for business teams.Free on Mac, Windows, Web, Android, and iPhone** Why Business Teams Love Using Hall **Group & Private ChatEasily message one-on-one or in groups with users in- or out-of-network. No need for a work email address.Syncs Across All DevicesHall syncs seamlessly and persistently across Mac,...... TpSort Score | 17,000,000

15. Kablink

Kablink is the first Enterprise suite for team collaboration built on an Open Source project to unify team workspaces with real-time conferencing, while encouraging rapid user adoption through social networking software....... TpSort Score | 28,500,000