Designing Smart Heat Pumps That Work for Every Room with Quilt

Paul Lambert is the Co-founder and CEO of Quilt,  a company designing smart ductless heat pumps for residential heating and cooling with intelligent room-by-room controls. Quilt was founded in 2022 and launched in the San Francisco Bay Area in spring 2024. Since then, they have achieved hundreds of deployments and are preparing to expand to their next market in Southern California. Earlier this year, they announced a $33 million Series A financing round co-led by Energy Impact Partners and Galvanize Climate Solutions, following a $9 million seed round in 2023 co-led by Lowercarbon Capital and Gradient Ventures. MCJ is proud to have invested in both rounds through our venture funds. Before founding Quilt, Paul led sustainability efforts at Area 120, Google’s in-house incubator for product ideas developed during employees’ 20% time. He previously held product roles at Google and Twitter and began his career by founding, running, and exiting a startup called LearnDot. In this conversation, we wanted to understand Paul’s product mindset—how Quilt works, the assumptions he’s validated along the way, and how he’s approached the challenges of building the business. *Due to the recent fires, Quilt will now launch in Los Angeles in the Spring of 2025.