Slack
Freemium
Slack is a cloud-based team collaboration tool.
eXo Platform
Commercial
eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform.
HumHub
Open Source
HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.
Diaspora
Open Source
Diaspora is a nonprofit, user-owned, distributed social network that is based upon the free Diaspora software.
Bitrix24
Freemium
Bitrix24 is a free (for small businesses) social enterprise platform.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Compare Jostle with alternatives
Compare eXo Platform and Jostle and decide which is most suitable for you.
Compare Dialog Messenger and Jostle and decide which is most suitable for you.