Nick Noone has fallen on his face in front of thousands of people countless times. The son of a mechanic who moonlighted as a mural painter and a Montessori school teacher was a member of Stanford University’s men’s gymnastics team where he met his teammate and future cofounder, Ben Rudolph. Years later, after a stint at Palantir, Noone climbed into a Honda Accord with Rudolph and started cold-calling police chiefs to build a public safety platform for law enforcement.

That origin story is now Peregrine Technologies, a San Francisco-based AI data integration platform built from the back of a detective division in San Pablo, California. Peregrine raised $250 million in Series D funding at a $6.8 billion valuation, Fortune learned exclusively. The round was led by existing investors, including Fifth Down Capital, Sequoia Capital, OG Venture Partners, Goldcrest Capital, XYZ Ventures, and Godfrey Capital.

Peregrine’s Series C round valued it at $2.5 billion just 15 months ago—a nearly 3x jump in a single funding cycle. Noone declined to share revenue, but said the company has more than doubled its customer base over the past year, now serving more than 400 agencies and organizations representing roughly 125 million people across North America. He expects to be working with close to 1,000 cities by year-end.