Do you know about any business bootstrapped success stories?

Lately, I have seen many VC funded companies and somehow overlooked those that are bootstrapped. In my opinion, to have such kind of company without external funding is harder and slower, so I look up those founders more. Do you know any successful bootstrapped companies that were able to scale up their MVP in 3 months or less? Maybe to 6 or 7 numbers. I would like to have a look at those companies in the future (maybe in my newsletter or videos).