Every campus is full of empty seats.

The mismatch

Students drive constantly: home for break, to the airport, to concerts, to the city, to the mountains. Most of those cars have empty seats. Meanwhile the students without cars are choosing between a $60 rideshare, a four-hour bus ride, or not going at all.

The supply and the demand walk past each other every day, on the same campus, often in the same group chat. All that's missing is the pairing.

The shape of the fix

tag. pairs the two sides and then gets out of the way. Drivers post trips they were already taking. Riders tag along and split the real cost, computed from the route, the car, and today's gas price, never negotiated, never marked up.

We're deliberate about what tag. is not. It's not a gig platform, drivers never profit, and it's not open to the public: a verified college email is the price of admission. Both constraints are the product. They're what makes the car feel like campus instead of commerce.

Why Berkeley first

UC Berkeley has everything the model wants: tens of thousands of students, constant trips to San Francisco, the airports, Tahoe, and LA, and a tight campus identity. tag. launches there, gets the density right, and then goes campus by campus.

Who's behind it

tag. is built by Rabee Abu Maraq, a Bay Area founder building the app end to end: native iOS, the matching engine, and the cost-split math. He answers his own email at rabee@ride-tag.com.

Say hi on Instagram at @ridewithtag or on LinkedIn.