Airbnb - GenerousLabs/about GitHub Wiki
After CouchSurfing came Airbnb.
Airbnb introduced a business model.
They pioneered the platform (or network) business model. People buying from people. People renting homes from other people.
This sparked a whole new wave of businesses. From taxis to boats.
Aside from the corporation, this concept was revolutionary. The largest ever accommodation business was built without any physical assets.