Recursive bullet lists Startups

WorkFlowy is a freemium productivity app that lets users organize information through infinitely nestable bullet-point lists with focus and zoom capabilities. Founded by Jesse Patel and co-founder Mike MacGirvin, the company grew organically to 800k ARR and over 100,000 active users through word-of-mouth and high user retention (3+ year average user lifetime), without raising external funding or doing traditional marketing.