The icon for the chat service app Slack, by Slack Technologies Inc., sits on the screen of an Apple Inc. iPhone 6 smartphone in this arranged photograph in London, U.K.  (Photographer: Chris Ratcliffe/Bloomberg)

Goodbye HipChat: Slack and Atlassian Team Up on Chat Software

(Bloomberg) -- Atlassian Corp. is selling its corporate chat software to rival Slack Technologies Inc. and taking a small stake in the startup, as they face greater competition from Microsoft Corp.

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