Jeffrey Carleton

Jeffrey Carleton is the co-founder and CEO of Runwise, a New York-based smart-building company that pairs proprietary wireless sensors with cloud software to cut the energy that boilers, cooling, electric and water systems waste. Drawing on seven years spent running 150 New York apartment buildings, he turned a hands-on operator's frustration with 1960s heating controls into a platform now deployed in more than 10,000 buildings, serving roughly 1,000 customers and saving over $100 million in energy costs. In June 2025 Runwise raised a $55 million Series B led by Menlo Ventures, bringing total funding to $79 million, around a thesis Carleton states bluntly: every building needs to be rebuilt with software, not bricks.