Fleetzero’s $43 million Series A round lands at an interesting moment for global shipping, when decarbonization has moved from aspirational slide decks into the uncomfortable territory of real hardware, real costs, and real deployment risk. This is no longer about futuristic vessels gliding silently across oceans in promotional videos; it’s about whether the industry can actually build, scale, and operate new propulsion systems at volumes that matter. Fleetzero is clearly positioning itself on that fault line, not just announcing capital but pairing it with a new manufacturing and R&D headquarters in Houston, a city whose identity is deeply tied to heavy industry, energy systems, and things that are built to last, not just to demo.