Vantem is a startup construction company manufacturing high-efficiency, net-zero homes at competitive costs and low embodied carbon. The company recently raised a Series A round of investment from the Bill Gates-founded firm Breakthrough Energy Ventures. Net-zero homes, buildings that produce as much energy as they use, are typically cheaper to own than standard housing. Still, they often involve high construction costs since they require advanced building technologies and engineering. Vantem aims to change this dynamic by employing modular construction technology.