Key Points Waymo crossed 450,000 weekly paid rides, according to a letter from investor Tiger Global viewed by CNBC. In April, the Alphabet-owned robotaxi unit hit 250,000 weekly rides. Waymo is continuing to push ahead of self-driving competitor Tesla, which has run limited pilots in Austin and the Bay Area. In this article Waymo, the robotaxi unit owned by Alphabet , has crossed 450,000 weekly paid rides, according to a letter from investor Tiger Global viewed by CNBC. That's almost double the milestone it hit in April, when Waymo reported 250,000 paid robotaxi rides a week in the U.S. "Waymo is the clear leader in autonomous driving, recently surpassing 450k trips per week with a product that is 10x safer than human drivers," Tiger Global wrote in a letter to investors announcing the launch of a new fund. Tiger's 450,000-ride estimate is based on publicly available data. Waymo is one of the largest positions in Tiger's 2024 fund. Waymo declined to comment.