Startup · United States
Quaise Energy
HQ Houston, TexasFounded 201851-200 employeesUpdated
Develops millimeter-wave drilling for superhot deep geothermal energy.
Funding7 rounds · $231M
- Equity raised
- $231M
- Debt, secondaries & grants
- $25.0M
- Latest
- $25.0MGrant · Sep 22, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Sep 22, 2026 | Grant | $25.0M | — | — | — | Reported |
| Aug 27, 2026 | Series B | $180M | — | Prelude Ventures | — | Confirmed |
| Jul 7, 2026 | Debt | Undisclosed | — | — | — | Reported |
| Dec 12, 2023 | Series A | $21.0M | — | Prelude Ventures, Safar Partners | — | Reported |
| Jun 8, 2022 | Series A | $12.0M | — | TechEnergy Ventures | — | Reported |
| Aug 4, 2021 | Undisclosed | $12.0M | — | — | — | Reported |
| Jun 8, 2020 | Seed | $6.0M | — | — | — | Reported |
- Grant$25.0MSep 22, 2026
- $180MAug 27, 2026
- DebtUndisclosedJul 7, 2026
- Series ALed by Prelude Ventures, Safar Partners$21.0MDec 12, 2023
- Series ALed by TechEnergy Ventures$12.0MJun 8, 2022
- Undisclosed$12.0MAug 4, 2021
- Seed$6.0MJun 8, 2020
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
Capabilities1
| Technology | Role | Maturity | TRL | Notes | Confidence |
|---|---|---|---|---|---|
| Power, grids and energy storage | Developer | — | — | classify_sectors run 37, haiku, taxonomy 2026-10-18b: Millimeter-wave drilling for superhot deep geothermal energy, which is power generation; no defense use is stated. | Reported |
- Developerclassify_sectors run 37, haiku, taxonomy 2026-10-18b: Millimeter-wave drilling for superhot deep geothermal energy, which is power generation; no defense use is stated.—Reported
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
People5
| Person | Role |
|---|---|
| Aaron Mandell | Co-Founder |
| Carlos Araque | Co-founder |
| Matthew Houde | Co-founder |
| Paul Woskov | Co-Founder |
| Kevin Bonebrake | Chief Financial Officer |
Sources3
Funding2
- 1CompanyQuaise Energy
Supports Funding round, Organization · employee range, Organization · founded year, Organization · hq city, Organization · hq region, Organization · linkedin url, Role
“funding round: Debt Financing, 2026-07-07”
- 2
Supports Funding round, Funding round · investors, Organization, Organization · ownership
“raising a total of $180 million in equity financing, including a $35 million investment from Nabors Industries (NYSE: NBR), one of the world's largest land drilling contractors and a long-standing partner to Quaise. Nabors has also entered into a strategic framework agreement that supports Quaise’s mission to make superhot geothermal a commercial reality, beginning with the”
People1
- 3CompanyCompany
Supports Role
“Carlos Araque is the President, CEO, and a co-founder of Quaise Energy.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.