Startup · United States
Mazama Energy
HQ Frisco, TexasFounded 202311-50 employeesUpdated
Superhot rock geothermal, proven at 629 degrees F, with the potential to deliver gigawatt-scale, always-on power, anywhere.
Funding3 rounds · $171M
- Equity raised
- $171M
- Debt, secondaries & grants
- Undisclosed
- Latest
- $135MSeries B · Sep 17, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Sep 17, 2026 | Series B | $135M | — | Centaurus Capital, Doerr Capital | — | Confirmed |
| Oct 28, 2025 | Series A | $36.0M | — | Khosla Ventures | — | Reported |
| Nov 21, 2024 | Grant | Undisclosed | — | — | — | Reported |
- Series BLed by Centaurus Capital, Doerr CapitalConfirmed$135MSep 17, 2026
- Series ALed by Khosla Ventures$36.0MOct 28, 2025
- GrantUndisclosedNov 21, 2024
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.
Systems5
- HeatHarvester®A forecasting tool that predicts reservoir and well performance over years for contractable output.
- Mazama DrillA drilling system for horizontal wells that maintains integrity at very high temperatures.
- Mazama Superhot Rock EGSAn enhanced geothermal system that operates at super‑hot rock temperatures to generate power.
- MUSE™ — Modular Unconventional Superhot EnergyA system that integrates drilling, reservoir, and harvesting technologies into a single geothermal power solution.
- Thermal Lattice®An engineered reservoir technology that creates a durable pathway network for heat extraction.
Newest unveiled first. Systems that belong to a government program link to the program page, where variants, costs and contracts are.
Capabilities1
| Technology | Role | Maturity | TRL | Notes | Confidence |
|---|---|---|---|---|---|
| Power, grids and energy storage | Developer | — | — | classify_sectors run 37, haiku, taxonomy 2026-10-18b: Superhot rock geothermal for gigawatt-scale power; no defense or security use is stated. | Reported |
- Developerclassify_sectors run 37, haiku, taxonomy 2026-10-18b: Superhot rock geothermal for gigawatt-scale power; no defense or security use is stated.—Reported
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
People4
| Person | Role |
|---|---|
| Sriram Vasantharajan | Founder |
| Alain Bonneville | Chief Geoscientist |
| Brady Parish | Acting CFO |
| Sriram Vasantharajan | CEO |
Sources7
Profile2
- 1CompanyContact Us | Mazama Energy
Supports Organization · hq city, Organization · hq region
“2600 Network Blvd., Ste 550, Frisco, TX 75034”
- 2
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "USA", "hq_iso2": "US", "id": "064108ef-2160-4214-b32c-db551595e4d6"}”
Systems1
- 3
Mazama Energy · Supports Organization · description, Organization · name, Organization · website, System
“Superhot rock geothermal, proven at 629 degrees F, with the potential to deliver gigawatt-scale, always-on power, anywhere.”
Funding2
- 4CompanyMazama Energy
Supports Funding round, Organization · employee range, Organization · founded year, Organization · linkedin url, Role
“funding round: Grant, 2024-11-21, lead: US Department of Energy”
- 5
Supports Funding round, Funding round · investors, Organization · ownership
“today announced $135 million in new capital to accelerate superhot rock geothermal commercial development, including an oversubscribed Series B led by Centaurus Capital, founded by John Arnold, and Doerr Capital. ConocoPhillips and Shell Ventures joined the round, with repeat investment from Khosla Ventures and Gates Frontier. Additional investors include SiteGround Capital,”
People2
- 6
energydigital.com · Supports Role
““The breakthrough in superhot geothermal is turning extreme heat into a repeatable, economic power system,” said Sriram Vasantharajan, CEO of Mazama Energy.”
- 7
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.