The idea of Whatnot was led by buyer trends. Instagram's live feature became a popular place for selling toys and trading cards, but of course was not set up to facilitate bidding or handling payments after a sale occurs. Whatnot combines live showcasing with follow-up sale capabilities, thus serving the community in a more novel way than established collectibles market players such as eBay.

The company has grown fast. It was established in 2019 and has already expanded from its original category - Funko Pop figurines - to Pokemon cards, pins, sports cards, and many more. There is still plenty of scope for expanding into new categories, as the company aims to establish itself as the go-to for this large niche, which will be facilitated by the strong levels of funding that Whatnot has raised.