The taxi wars are on, and we at Inc. are bringing them to a new frontier: the office. Both Lyft and Uber, two frontrunners among startups in the global car-hailing space, are in their fast-growth phase. They're both headquartered in San Francisco, and they both are flush with venture-capital funding. They're also both hiring rapidly, and hoping to create cool company cultures along the way. How better to accomplish that than having a shiny, new--and very cool--office? 

Let's tour both company headquarters, and let you be the judge as to which is the cooler office.