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Sublime Systems
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Sublime Systems

Decarbonized cement.





Somerville, Massachusetts



Company Description

Sublime is developing a breakthrough process to make low-carbon cement. The technology replaces the industry's legacy fossil-fuel-intensive thermal calciner process with an electrochemical process that produces low-carbon cement at ambient temperatures with renewable electricity. Sublime was started in 2020, as a spin-out of Yet-Ming Chiang's lab at MIT (Form Energy, A123, American Superconductor, 24M, Desktop Metals).

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Total Raised

$40 million



Significant Investors

Lowercarbon Capital, The Engine, Energy Impact Partners, Siam Cement Group

Company Traction

  • As of June 2023, Sublime Systems claims it avoids one ton of CO2 per ton of cement produced.
  • As of February 2023, Sublime Systems can currently produce cement at a rate of 100 tons yearly.
  • As of February 2023, Sublime Systems plans to build a facility to produce up to 40,000 tonnes yearly.

Leadership Team

  • Leah Ellis: Co-Founder & CEO of Sublime Systems. Former Research Associate at E-One Moli Energy.
  • Yet-Ming Chiang: Co-Founder & Chief Scientist of Sublime Systems. Former Co-Founder of Desktop Metal.
  • Raffi Mardirosian: VP of Strategy at Sublime Systems. Co-Founder & Managing Partner at Izuba Energy.
  • Jesse Benck: VP of R&D at Sublime Systems. Former Research and Development Manager at L3Harris Technologies.
  • Luis Baquerizo: Head of Product R&D at Sublime Systems. Former Head of Research and Development at Cementos Pacasmayo SAA 


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