Sean Rad, the founder of dating app Tinder, knew right away he had a hit app on his hands. In an interview with Business Insider Editor-in-Chief Alyson Shontell, Rad discusses the highs and lows of building a business. He explains how he came up with the idea for Tinder, how his team marketed the app so it'd go viral, and how hard it is to run a startup in your 20s — even when the startup is successful.

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