SAN FRANCISCO
Our office in San Francisco is located in the center of San Francisco:

If you fly into the airport (SFO), we encourage most people to take a cab to the office.
If you wish to take the train, here are the instructions (BART is the name of the train system):
Take the Millbrae-SFIA to Pittsburg/Baypoint – Metro rail towards Pittsburg/Baypoint. Get off BART at the Montgomery Street stop. Exit BART station, cross Market Street and walk down 2nd Street. Take a left on Howard Street. Bigpoint will be located on the corner of 1st and Howard on the left hand side of the street at 500 Howard Street, Suite 300.