Every VC said no. "Too risky." "Too early." "Too niche." So we slept in cars, borrowed lab space, and worked in the dark – literally. No investors. No safety net. Just two founders, one prototype, and the belief that profit from customers is the best funding source. 18 years later: €56M revenue. 250 employees. 100% founder-owned.

Here’s What It Cost Me. When we started NanoTemper, we were just a handful of people. Tight rooms. No windows. Long days. No idea what we...