Google co-founder Larry Page's flying car startup Kittyhawk is winding down, the company announced Wednesday. "We're still working on the details of what's next," the company wrote in a LinkedIn post. Kittyhawk was founded as Zee.Aero in 2010 when Page recruited Sebastian Thrun, who had worked on self-driving cars and other experimental projects at Google, to create electric vertical takeoff and landing aircraft. The company unveiled a demonstration video of a flying car in 2017, and Thrun said he envisioned a time when people would be able to hail flying cars through an app like Lyft or Uber. Kittyhawk showcased a flying car model called the Flyer in 2018 that could hold one person and fly up to 20 miles. Thrun told CNBC in an interview earlier that year that the models could take to the skies within five years.

Kittyhawk was founded in 2010 to pioneer the market for so-called eVTOLs -- electric vertical takeoff and landing aircraft -- with the lofty goal of democratizing the skies. The secretive company was run by Sebastian Thrun, a Google veteran who worked on self-driving cars, augmented-reality glasses and other projects. The business was one of several startups working on the concept, which has proven to be a greater challenge than some expected. Air taxis have suffered crashes during testing in recent months, raising concerns about their safety. Insider previously reported on Kittyhawk's plans to close.