How can you make millions with a side hustle?

December 4th, 2025· 759 views· 1:04
E
Entrepreneur

Kristian Tapaninaho and Darina Garland, the married co-CEOs of home pizza oven company Ooni, went from Kickstarter to hundreds of millions in revenue. Tapaninaho got into making pizza at home more than a decade ago, but he found the pizza oven market lacking. The couple commissioned a prototype and launched what would become Ooni on Kickstarter. They’ve grown the brand to more than $200 million a year in revenue, all without taking on private equity funding — and have smart advice for entrepreneurs who want to start a product business. Want more inspiration and tips from Entrepreneur? Check out our Money Makers newsletter: bit.ly/4rtPJNs Follow us on social media: https://www.facebook.com/Entrepreneur/ https://www.instagram.com/entrepreneur https://www.tiktok.com/@entrepreneur https://x.com/entrepreneur