Stewart Butterfield

Email is the lowest common denominator. It's the way you get communications from one person to another. There isn't really an alternative. Sometimes people will have Facebook messenger turned on, but 99 percent of the time, if you're sending a message to a human you don't know well, you're using email.

The scale of revenue growth is unprecedented. If you look back over history, whether you're looking at the railway robber baron era or the 1920s or the '50s or the '70s, it used to take a long time for a company to get to the point where they had tens of millions of dollars of revenue. It was almost never an overnight phenomenon.

The Gmail app is definitely the app I use the most. I am always running from meeting to meeting, so it keeps me up-to-date with everything going on. I actually e-mail more often from my iPhone than my laptop, so having a nicely designed e-mail app is really important.

I have friends of mine that are actors or singers, and they're the classic guys where, they're onstage, and they're like, 'Okay, the blonde in the third row, seat 24, bring her to my dressing room.' I've never, never taken advantage of that, I swear to God.