Group messaging & video meetings for teams, from Atlassian
Yammer is a Private Social Network for Your Company
Bring all your communication together in one place
A faster way for your team to communicate
Flowdock is your team's chat with a shared inbox. Teams using Flowdock react in seconds and never forget anything.
A freeware, cross-platform messaging and Voice over IP service
Professional online meetings built for business
Chat-based workspace in Office 365
Open-source, self-hosted, Slack alternative
Messaging for people who make software. Integrated with your team, projects and your code.
Open source slack alternative
Powerful open source team chat
A cloud-based instant messaging and voice over IP service
A messaging platform built for teams
Slack for the whole world, except end-to-end encrypted across all your devices
An online team collaboration tool
Open source team messaging application with apps for Android, iOS, and Web
Your own business messenger.
Team collaboration with real time chat.
A community platform for the future.
Slack without the annoying distractions
Open source self-hosted chat app for small teams
A messaging and communications application focused towards business and productivity
An open source instant messaging client
Real-time business chat & texting for teams
An instant messaging and groupchat server
Ryver provides all of your team communications in one place: chats, posts, and files
Like Slack except P2P, offline friendly, and open source
Effective teamwork, smooth workflow collaboration tool
A modern and Open Source Web client for XMPP
A Team communication software
A messaging platform for all
Instant messaging software for teams who value collaboration
Enterprise Communication & Collaboration Platform
A decision-making software designed to assist groups with the collaborative decision-making process
A small alternative to Slack