Mazama Energy is developing superhot enhanced geothermal systems at Newberry Volcano in Oregon, where it reached 331 degrees Celsius (629 degrees Fahrenheit) in October 2025, a record for an engineered geothermal system.
At a glance
| Price from | Custom |
| Best for | Large power buyers backing superhot geothermal |
From Mazama Energy's own website.
What stands out
- Record temperature for an engineered geothermal system
- Well funded for further drilling
Worth knowing
- Pilot stage
- No commercial power yet
How it ranks
Mazama Energy is ranked 6th of 10 in Best Geothermal Energy Companies (Lister Score 91.0).
#6 in Best Geothermal Energy Companies · Lister Score 91.0
Mazama raised $135 million in a Series B led by Centaurus Capital and Doerr Capital in September 2026..
| Rank | Best Geothermal Energy Companies | Score |
|---|---|---|
| 1 | Fervo Energy | 97.5 |
| 2 | Ormat Technologies | 96.2 |
| 3 | Eavor Technologies | 94.9 |
| 4 | Quaise Energy | 93.6 |
| 5 | Sage Geosystems | 92.3 |
| 6 | Mazama Energy | 91.0 |
| 7 | XGS Energy | 89.6 |
| 8 | Zanskar | 88.2 |
| 9 | Geothermal Engineering Ltd (GEL) | 86.8 |
| 10 | Rodatherm Energy | 85.4 |
Frequently asked questions
How does Mazama Energy rank on Lister?
Mazama Energy is ranked 6th of 10 in Best Geothermal Energy Companies (Lister Score 91.0).
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