What does it really take to build a high-growth AI startup in Europe?In this episode of Once Upon a Student, we sit down with Daniel Keinrath, founder of Fonio, a fast-growing AI phone assistant startup generating over €300,000 in monthly revenue and growing 30% month over month.

At 18, Daniel was organizing nightclub events and got screwed over by the Mafia on his first major event. Years later, he sold his first company and went on to build one of Europe’s most ambitious voice AI startups.This conversation goes far beyond business tactics.

We talk about why studying can feel safe but often keeps you small, how to sell a product before you build it, why most founders focus on the wrong things, and what it actually means to take ownership.If you are a student, aspiring entrepreneur, or young founder trying to figure out your path, this episode will challenge the way you think about safety, comfort, and ambition.

🎙 Topics we cover:

• Building an AI startup in Europe

• Selling before building

• Bootstrapping vs. raising investors

• Startup culture and hiring for ownership

• Why “no one cares unless you deliver value”

• The biggest lie students tell themselves

• Why comfort kills growth