commercial-services
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Hiller Plumbing, Heating, Cooling & Electrical
Hiller started with $500, one truck and a promise to leave the work area clean. Thirty-six years later, its real product is bigger than plumbing or HVAC: a repeatable system for making an anxious homeowner feel in control.
Charlie Warren
Charlie Warren is a startup founder-turned-investor who built Convex, a commercial services software platform, from a garage bootstrapping sprint through $60M in venture funding and a YC Top Companies nod, before selling to ServiceTitan in 2024. Today he serves as a Visiting Partner at Y Combinator, bringing hard-won founder experience to the next wave of vertical SaaS builders. His unusual arc - Goldman Sachs to energy policy to enterprise software - gives him a perspective on markets that most investors simply don't have.