Slack is well on its way toward total workplace domination. The company today announced that it has acquired Hipchat and Stride, two workflow productivity apps designed for large enterprises, from Sydney, Australia-based company Atlassian.

“Slack and Atlassian have worked closely together for many years, and Atlassian’s tools, including Jira, Trello, and Bitbucket have already been installed by hundreds of thousands of Slack teams,” Slack chief product officer April Underwood said in a statement. “This deeper partnership exemplifies our shared belief that the world of enterprise software is moving to a model in which people are building their own technology stack with the highly specialized, interoperable tools that best suit their needs.”

As part of a strategic partnership, Slack will pay an undisclosed amount over the next three years for the intellectual property underlying Hipchat Cloud and Stride. Atlassian will continue to manage both products until February 15, 2019, at which point it’ll offer customers the option to migrate to Slack. (Organizations that have Hipchat installed on-premises will be able to use it for as many as two additional years.)

Atlassian has also agreed to make a “small but symbolically important investment” equity investment in Slack, Slack CEO Stewart Butterfield said in a series of tweets.