Calendly, a scheduling company founded by Tope Awotona, was born out of dissatisfaction.

It's now worth $3 billion.

Learn more about this 40-year-old's journey and this entrepreneur from Lagos, Nigeria, who immigrated to the U.S. in 1996 as a teenager, bootstrapped Calendly for years before taking on a $350 million investment in 2021 that valued the firm at $3 billion.

Source: Forbes