I've never heard of Wealthfront, and I know Robinhood mostly for exploiting low-info customers & trying to make investing even more like gambling than it already is[1]. Pretty gross company to be keeping IMO.
They have been around as a significant service provider for over a decade in a highly regulated industry. Ask anyone in the brokerage world and they will not care if there’s a Wikipedia entry. They are a huge player and have been for a while.