Prelude Ventures

Arable helps enterprises achieve ambitious water goals and growers realize high-ROI water stewardship through AI-driven irrigation optimization products.

Boston Metal is redefining global metals production with its patented Molten Oxide Electrolysis (MOE) platform technology, which produces steel without carbon emissions and recovers valuable metals from mining waste.

Branch Energy is a venture-backed company providing sustainable energy solutions and battery storage for businesses and homes, focusing on fixed-rate electricity and customer service.

Citrine provides the best in class AI platform for product development, that will be used by everyone in your organization, and supported by an experienced team of experts with 10 years’ pedigree helping customers take AI to scale.

Ebb is pioneering electrochemical water technology that tackles two of the world's most urgent problems: growing demand for freshwater and excess carbon dioxide in the atmosphere. We partner with desalination plants to transform brine—the salty waste stream left behind after freshwater is extracted—into additional freshwater, permanent carbon removal, and valuable industrial products.

Electric Hydrogen focuses on developing high-power electrolyzers to produce clean hydrogen at the lowest cost, aiming to empower industrial decarbonization.

A family office-backed venture fund focused on climate-sensitive clean energy, healthcare, food, and air innovations.

A $1+ billion climate fund backed by ultra-high-net-worth individuals like Bill Gates, Jeff Bezos, and Jack Ma, with an unusually long 20-year investment horizon and a requirement that portfolio companies can avoid at least 500 million tons of CO2 emissions annually by 2050. The fund combines deep technical expertise from former ARPA-E leaders and scientists with access to a broader Breakthrough Energy ecosystem of policy, advocacy, and deployment programs, making it a gold standard validator for technically ambitious climate hardware companies.

Clean Energy Ventures funds disruptive, capital-light technologies and business model innovations that reshape how we produce and consume energy. Since 2005, the leadership team has invested in 40+ climate tech startups with the potential to substantially reduce greenhouse gas emissions by 2050. The firm requires every investment to demonstrate 2.5 gigatons of CO2 mitigation potential using their proprietary calculator. More than 60% of the investment team holds advanced science or engineering degrees to provide hands-on technical support. Their track record includes only ~15% write-offs in hardware-focused cleantech, unusually low for a sector where 90%+ of post-2007 funded companies failed to return capital.

Leads deep-tech, hardware-heavy climate investments across cutting emissions, carbon removal, and time-buying solutions, backing nonprofit research and offering in-house scientific expertise plus hands-on technical, hiring, and regulatory support.

Canada's largest dedicated climate-tech seed fund with over $180M–$200M AUM. Operates a capital + talent model with shared talent hub for portfolio companies. Only backs business models where revenue growth is directly tied to climate outcomes and tracks tonnes of CO₂e mitigated as their north star metric. Founded by Mike Winterfield, formerly President of Randstad Professionals managing $300M in revenue.