The buyer of San Francisco's most expensive home was Kyle Vogt, cofounder of Twitch and Cruise Automation, according to OpenHouse.

Vogt bought the house for $21.8 million, according to Redfin, which makes it the biggest sale in the city so far this year. The home was originally listed for $28 million in November 2015, but the price was chopped by $3 million in June. It was San Francisco's most expensive listed home at the time of the sale.

Vogt is a serial entrepreneur who sold his car automation startup, Cruise Automation, to General Motors for a reported $1 billion in March; he remains its CEO. He's also a cofounder of the video streaming startup Twitch, which Amazon purchased for $970 million in 2014.

Vogt is known to some as the "Robot Guru" for his interest in robotics. He studied computer science and electrical engineering at MIT.

His new home was built in 1901 and has been turned into a contemporary-style mansion with 9,095 square feet of space. It has seven bedrooms and seven bathrooms spread out over three floors, and is situated on one of San Francisco's highest streets.

It was most recently owned by Tara and Bryan Meehan, who made a fortune on investments in Blue Bottle Coffee. The couple gutted and restored the home, but apparently never moved in.

The home was listed with Compass real estate.

Vogt did not immediately respond to Business Insider's request for comment.

This story first appeared on Business Insider.