Mailchimp was a little like that, as it was started in 2001, between tech bubbles, and was mostly a side project for years. https://www.forbes.com/sites/alexko

Mailchimp was a little like that, as it was started in 2001, between tech bubbles, and was mostly a side project for years. https://www.forbes.com/sites/alexkonrad/2018/10/08/the-new-atlanta-billionaires-behind-an-unlikely-tech-unicorn/ https://www.forbes.com/sites/alexkonrad/2018/10/08/the-new-a...