We launched Uber in June 2010, and we don't own cars or employ drivers; we have 120 employees, most of whom are not in San Francisco, and we're deployed in 17 cities.

During my seven years at Uber, we expanded to 70 countries, completed 5 billion rider trips, and achieved a $70 billion valuation.

My leadership has evolved significantly since Uber, where I learned from running a small team to managing thousands of employees and millions of drivers.

I learned that you shouldn't start a tech company in a country where Uber is illegal, as it can create significant challenges.

In San Francisco, there are now more cars dedicated to Uber than there were town cars before we launched, showing our growth in the market.

The original idea for Uber came from wanting to push a button and get a classy ride, inspired by the difficulty of hailing cabs in cities like Paris and San Francisco.

I run a company called Remix, where we help about 300 cities around the world plan their transportation future, from public transit to street design.

As young founders, our naivety allowed us to explore ideas without preconceived notions, leading us to discover the unique experience that Airbnb could offer. When we started Airbnb, we were in a very different position compared to Uber; the founders of Uber were already wealthy, while we were just trying to survive.

Uber is an app on your iPhone that helps you get a car, with the motto 'everyone's private driver.' You can see nearby cars and get notified when your driver arrives.