Many employees already interact with Slack all day long—on their computers, phones, and wrists—blurring the lines of when work hours start and end. It’s a well-documented fact that Slack is out to kill work email, but its latest development sets it up—in theory, at least—to replace clunky enterprise tools entirely. Of course, that will depend on how robust the Slack ecosystem is. Currently, Slack has more than 500 app integrations, and it believes that its new message buttons, the API of which is available to third parties starting today, will “usher in a whole new world of apps built for Slack.”

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