Joe Gebbia Joe Gebbia at TED. TED2016

At this week's TED conference in Vancouver, Airbnb cofounder Joe Gebbia revealed the email that launched the home-sharing juggernaut.

In 2007, Gebbia and cofounder Brian Chesky learned a design conference was coming to San Francisco, and all of the hotels were sold out. Gebbia pitched Chesky (his best friend and roommate) on renting out a space for these people to stay in. 

Here's the email he sent:

The text: "brian, I thought of a way to make a few bucks — turning our place into "designers bed and breakfast" — offering young designers who come into town a place to crash during the 4 day event, complete with wireless internet, a small desk space, sleeping mat, and breakfast each morning. Ha!"

That idea ultimately spawned the Airbnb we know and use today.