Eco-Baby, TrailBuddy, Quility and TapeKing aren't exactly household names, but they're working on it. Their products are among the most popular in their categories on Amazon, accounting for millions of dollars in yearly sales.
They're also owned and operated by a single company called Thrasio, which recently raised $750 million in financing. It's just one among dozens of firms snapping up successful Amazon brands for millions of dollars.