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let's build
A climate-positive world is built
on a carbon-negative foundation
introducing the first carbon-negative process for making portland cement
We can transform the cement industry from climate problem to climate solution. Cement is one of the most used materials on the planet. It's also a huge source of global emissions. 
Over 4 billion tons of cement are produced each year—a number only expected to grow. The problem is that cement production accounts for 7.5% of global CO2 emissions, with a total climate impact just behind cars. In fact, if the cement industry were a country, it would be the third-largest emitter in the world.
We're here to change this with our breakthrough carbon-negative process for making ordinary portland cement. It’s the same material builders have relied on for 150 years, now with a positive climate impact.
carbon-negative
The Brimstone Process™ is carbon-negative, removing CO2 from the air.
low cost
The Brimstone Process™ is cost-competitive at scale.
zero trade-offs
The Brimstone Process™ makes cement that is chemically and physically identical to conventional portland cement.
we are a climate tech company working on the most impactful solutions for the industrial sector
To make the greatest impact for the climate, entire industries need to transform—fast. That’s no easy task, but that's why we started Brimstone. We're a team of scientists, problem-solvers, engineers, innovators, and builders on a mission to solve the hardest climate problems and accelerate the evolution of critical industries for the climate era in an economically competitive way. We’re starting with cement.
proof-of-concept
Completed
bench-scale validation
Completed
pilot plant
In progress
commercial demonstration plant
Securing advance commitments
commercialization
Coming soon
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