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It looks a bit like Slack and functions similarly, with threaded persistent chats that can be open or private.
It also integrates with the company's Skype video service, plus you can invite guests to join your chats.
It offers one-on-one private chat with individual team members, group chat and threaded discussions.
Its team inbox feature, on the other hand, keeps and organizes emails and messages related to project management, customer support and other sources.
Atlassian, also of Hip Chat fame, has released another chat program, designed to more directly compete with Slack.
Stride is a team communication tool that replicates much of what you find in Hip Chat, while adding natively hosted video and audio meetings.
In addition to one-on-one and group chat, Slack comes with individual and team audio calls and video conferencing.
MSN Messenger shuttered in 2014 and Yahoo Messenger shut down in 2016.