You can measure the success of a start-up in square footage.

Just ask Xobni.

A few weeks ago, Xobni moved into Twitter’s old offices in the South of Market area of San Francisco. With 30 employees, it could no longer squeeze into the offices that it first occupied with four people in 2007.

There are still some stray birds painted on the walls, but the expansive views and wide-open spaces now belong to Xobni. 

It seems like only yesterday that Adam & Matt were working out of a dorm at MIT!