Slack is definitely all the rage right now, despite a whole plethora of similar products. I attribute it nearly wholly to their secret sauce of design [https://medium.com/@awilkinson/slack-s-2-8-billion-dollar-secret-sauce-5c5ec7117908?utm_content=buffera7978&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer] and API-ability. Although,