San Francisco is the headquarters of multiple Internet-based companies.
Airbnb is an online marketplace and hospitality service , enabling people to lease or rent short-term lodging including vacation rentals , apartment rentals , homestays , hostel beds , or hotel rooms . Dropbox is a file hosting service operated by American company Dropbox , Inc. , headquartered in San Francisco , California , that offers cloud storage , file synchronization , personal cloud , and client software . Salesforce.com ( styled in its logo as salesƒorce ; abbreviated usually as SF or SFDC ) is an American cloud computing company headquartered in San Francisco , California . San Francisco . San Francisco is also the headquarters of five major banking institutions and various other companies such as Levi Strauss & Co. , Gap Inc. , Salesforce.com , Dropbox , Reddit , Square , Inc. , Dolby , Airbnb , Weebly , Pacific Gas and Electric Company , Yelp , Pinterest , Twitter , Uber , Lyft , Mozilla , Wikimedia Foundation , Craigslist and Weather Underground .