MCJ

MCJ is a Boston-based early-stage venture capital firm founded in 2019 by Jason Jacobs, originally launched as the My Climate Journey podcast before evolving into a formal investment vehicle. The firm backs founders driving the transition of energy and industry, and building solutions to the inevitable impacts of climate change. Sector focus spans clean energy, carbon removal, climate adaptation, industrial decarbonization, climate resilience, and advanced energy technologies. MCJ manages over $115 million in assets across two funds and has backed more than 80 startups, with recent investments including DG Matrix, Overstory, Hammerhead AI, Standard Nuclear, and DaisyChain Energy. Typical check sizes range from $500K to $5 million, primarily at pre-seed through Series A stages. The firm strengthens its investments through the MCJ Collective, a vetted member network connecting tech and industrial leaders with portfolio companies, and runs the Inevitable podcast and a newsletter reaching tens of thousands of climate professionals weekly.