Slack’s $2.8 Billion Dollar Secret Sauce

Like a well-built home, great software focuses on giving its users hundreds of small, satisfying interactions.

I was a big fan of Hipchat before Slack hit the scene. But Slack's attention to detail really does put Hipchat to shame. I first started using Slack almost exactly a year ago, and ever since then it's been everywhere, basically. Kudos to them.