Quaise Energy
Quaise Energy is a climate tech company in Cambridge, United States, founded in 2018. It has raised $195.0M across 3 rounds, most recently a $134.0M Series B in July 2026.
Unlocking the true power of clean geothermal energy.
- Headquarters
- Cambridge, Massachusetts
- Employees
- 11–50
- Founded
- 2018
- Business Model
- B2B
- Website
- quaise.energy
- Total Funding
- $195.0M
- Last Round
- $134.0M Series BJul 2026
- Rounds
- 3
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 3 funding rounds and 7 investors for this company. The full record is or through the API.
About
Quaise Energy is developing a radically new ultra-deep drilling platform that uses high-power millimeter waves derived from breakthrough fusion research at MIT's Plasma Science and Fusion Center to vaporize rock and reach geothermal depths of 3-20 km at temperatures of 300-500 degrees Celsius. Unlike conventional drilling, Quaise's gyrotron-powered system can repurpose existing fossil-fuel power station infrastructure to convert to superhot geothermal, enabling a faster and more equitable energy transition. The company was founded in 2018 and has raised over $21 million to advance its technology toward commercial field trials.
Summary
It lists 11–50 employees. It has raised $195.0M in total across 3 rounds, most recently a $134.0M Series B round in Jul 2026. Investors include Prelude Ventures, JERA and Idemitsu.
Tech & App Stack
2 technologies & apps tracked
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Funding History
Jul 2026
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Funding: Series A through Series B. Amounts, valuations, and investors where available.
Investors
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