Transforming Industry
Brimstone is a deep tech company developing the Rock Refinery, a patented co-production process that refines calcium-bearing silicate rock into portland cement, supplementary cementitious materials (SCM), alumina, and other industrial materials. The process eliminates CO2 emissions tied to limestone calcination, which accounts for the majority of cement's carbon footprint, while delivering cost-competitive products at industrial scale.
Tech & App Stack is available on paid plans
Upgrade to Silver or higher to reveal the full technology and app stack for any company.
View pricingCreate a free account to see funding visualizations and detailed round data.
Create Free AccountAug 2025
Create a free account to see which investors have funded this company.
Create Free AccountH2 Green Steel (now Stegra) is building the world's first large-scale green hydrogen steel plant ...
Decarbonizing the chemicals industry.
Develops Molten Oxide Electrolysis to produce low-carbon steel and recover valuable metals from m...
Self-driving cars.
Northvolt is a European battery manufacturer on a mission to deliver sustainable lithium-ion batt...
Green steel company using hydrogen and renewable electricity to decarbonize steel production. For...
