
The Startups.st co-founder has spent years helping entrepreneurs test their ideas. His own expensive lessons explain why he keeps asking what a business has actually proved.
Andrew Warner spent hundreds of thousands of dollars building the wrong thing. Mixergy became useful when he started asking other founders how they had done it.
The Freiburg startup hub connects researchers, founders, investors and industrial buyers. Its most useful offering may be a chance to prove that a clever technology belongs in somebody’s business.
Aaron Epstein is a General Partner at Y Combinator, the world's most prestigious startup accelerator. A serial founder who built his first software product in a college dorm room, he went on to co-found Creative Market (YC W10) — a design asset marketplace he grew to a 2014 Autodesk acquisition in under 16 months, then spun back out as an independent startup in 2017. At YC, he has reviewed over 8,000 applications, advised companies now collectively valued at $57 billion, and helped define how the accelerator thinks about marketplaces, business models, and pricing.