Gigascale Capital

Alkali is a purpose-built order management system for the chemical industry, helping suppliers, distributors, and buyers streamline the complex documentation process associated with chemical shipments.

Arbor Energy’s advanced power systems deliver clean, reliable baseload electricity with zero operating emissions, utilizing supercritical CO₂ turbines and oxy-combustion technology.

Cocoon Carbon specializes in low-carbon construction materials, specifically LoopCem™, a Supplementary Cementitious Material (SCM) derived from Electric Arc Furnace (EAF) slag, aimed at reducing CO₂ emissions in the steel and cement industries.

Dioxycle is focused on recycling carbon emissions into sustainable ethylene, which is used as a key feedstock in various everyday products, aiming to displace fossil fuel production.

Estes Energy Solutions develops and manufactures exceptional battery systems for rapidly expanding electrification markets, focusing on electric mobility and advanced manufacturing technologies.

FirstElement Fuel is enabling a future of clean and sustainable transportation powered by hydrogen, the most abundant element in the universe. They are the world leader in the retail hydrogen ecosystem, focusing on the widespread adoption of hydrogen fuel for vehicles through their True Zero network of hydrogen fueling stations.

Form Energy is an American company driving innovation in energy manufacturing and technology. Our cost-effective, multi-day energy storage solutions are designed to ensure a clean, secure, and reliable electric grid, even during prolonged periods of stress.

HomeBoost offers a DIY home energy assessment service that empowers homeowners to identify energy inefficiencies and save on energy bills. The service includes the use of a BoostBox with professional-grade tools for a comprehensive energy audit.

Light Energy enables companies to offer unique electricity plans integrated with their products, focusing on renewable energy and customer satisfaction.

Mill is an innovative food recycler that transforms food scraps into nutrient-rich grounds, designed to eliminate odors and reduce food waste effortlessly.

Panthalassa is a renewable energy company harnessing ocean power to generate clean energy at scale. It focuses on creating a sustainable, low-cost energy platform to meet global energy demands.

Building the next generation of veterinary vaccines aimed at improving cattle productivity and reducing methane emissions.

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.

Prelude Ventures manages capital exclusively for the climate-focused Simons family, creating a single-LP structure that demands strict venture returns from a 100% climate portfolio while applying a hard "no fossil fuels" rule that rejects any technology making oil, gas, or coal extraction cheaper or longer-lived. The firm combines deep technical operating experience with climate activism roots and has invested continuously through climate tech's "dark years" since 2009, positioning itself as a climate generalist comfortable with high capital intensity and long hardware timelines across the entire low-carbon economy.

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.

Miami-based VC focused on fusion, geothermal, advanced materials and climate tech, advising founders on capital-stacking deep-tech companies from lab to scale.