In no particular order here is a small subset of YC companies from 2-3 years ago that I bet will become household names in the next 2-3 years: Theorem, Algolia, Bellabeat, Flexport, Cruise (I guess a lot of people know about these guys already), Gobble, Front, Ginko Bioworks, Rigetti, Checkr, RazorPay, WayUp, Gitlab, Lob, Remix, TripleByte, Lugg, Jopwell, Gigster, and GiveCampus.