tl;dr: Halvar Flake (founder of zynamics and optimyze, sold to Google and Elastic respectively) shares lessons on B2B SaaS entrepreneurship, covering why to start a company, choosing a target market (and how market size dictates funding strategy), and the realities of VC dynamics—including misaligned risk appetites, herding behavior, and managing perception of momentum. He also details practical advice on product development (start from a problem, not a solution; use development partners and clickable prototypes), the distinction between user and buyer personas, and hiring practices like take-home interviews over whiteboards.