APX is a Berlin-based early-stage investor backed by Axel Springer SE and Porsche AG, operating a 100-day venture development program with monthly cohorts of 3-6 companies. The program invests EUR 50,000 initially for approximately 5% equity, with follow-on potential up to EUR 500,000 per startup. Participants receive tailored mentorship, access to corporate networks, and a co-investor network of over 100 partners.