Company lists · Data refreshed October 2026

Top 25 Geothermal power plants suppliers based in the United States

RevenueBase identified 78 company matches for geothermal power plants suppliers associated with the United States as of October 2026 and tracks 7,632 professional contacts across them, including 3,074 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal power plants suppliers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 26, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 26, 2026 How this list was built
78Companies
7,632Contacts tracked
3,074Verified emails
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The 25 largest geothermal power plants suppliers based in the United States

Ranked by team size
Top 25 of 78 company matches for geothermal power plants suppliers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 26, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Oct 26, 20261,001-5,0002,110 contacts →

Exact match

“A business unit of Constellation (NASDAQ: CEG), Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
2Exact matchReno, NV, United StatesHQ recorded Oct 26, 20261,001-5,0001,298 contacts →

Exact match

“With over five decades of experience, Ormat Technologies, Inc.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
3Exact matchSedalia, MO, United StatesHQ recorded Oct 26, 2026501-1,000824 contacts →

Exact match

“PROENERGY is an engineering, R&D, and manufacturing powerhouse.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
4Exact matchLatham, NY, United StatesHQ recorded Oct 26, 2026501-1,000386 contacts →

Exact match

“Mechanical Dynamics & Analysis (MD & A) provides power generation companies around the globe with a full-service OEM alternative for services, parts, and repairs.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
5Exact matchHouston, CA, United StatesHQ recorded Oct 26, 202651-200270 contacts →

Exact match

“Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
6Exact matchWest Allis, WI, United StatesHQ recorded Oct 26, 2026201-500215 contacts →

Exact match

“Toshiba America Energy Systems Corporation (TAES), headquartered in Milwaukee, Wisconsin, with major manufacturing and services, provides turbine/generator equipment and services…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
7Exact matchSan Juan, United StatesHQ recorded Oct 26, 202651-20096 contacts →

Exact match

“Somos una compañía formada por profesionales altamente calificados, fundada en el año 2010 con más de 10 años de experiencia en el mercado, dedicados a la Fabricación, Diseño…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
8Exact matchHouston, MA, United StatesHQ recorded Oct 26, 202651-20066 contacts →

Exact match

“Quaise develops superhot geothermal power plants for a terawatt-scale world.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
9Exact matchSullivan, MO, United StatesHQ recorded Oct 26, 202651-20048 contacts →

Exact match

“Quality Turbine/Generator Turnkey Services- Featuring first-class power generation component repairs, generator testing and repairs, airfoil/blade and precision component…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
10Exact matchValencia, CA, United StatesHQ recorded Oct 26, 20261,001-5,00043 contacts →

Exact match

“L.A.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
11Exact matchPalo Alto, CA, United StatesHQ recorded Oct 26, 202611-5033 contacts →

Exact match

“XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
12Exact matchAustin, TX, United StatesHQ recorded Oct 26, 202611-5027 contacts →

Exact match

“Our mission is to transform the heating & cooling of buildings, using geothermal energy to radically reduce costs for people and the environment.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
13Exact matchOklahoma City, OK, United StatesHQ recorded Oct 26, 202611-5025 contacts →

Exact match

“About GreenFire Energy GreenFire Energy engineers next-generation geothermal systems designed for real-world operating conditions.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
14Exact matchReno, NV, United StatesHQ recorded Oct 26, 202611-5024 contacts →

Exact match

“Open Mountain Energy combines its geothermal and project development expertise with Kaishan Group's power plant technologies and manufacturing to form a cutting-edge industry…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
15Exact matchReno, United StatesHQ recorded Oct 26, 202651-20019 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
16Exact matchBakersfield, CA, United StatesHQ recorded Oct 26, 202611-5017 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
17Exact matchGermantown, MD, United StatesHQ recorded Oct 26, 202611-5015 contacts →

Exact match

“Dewhurst Group (DG) is an energy exploration and development company.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
18Exact matchBaltimore, MD, United StatesHQ recorded Oct 26, 202611-5013 contacts →

Exact match

“In the 30 years of operation, Chesapeake Geosystems has earned a reputation as a geothermal contracting firm that delivers projects on time and on budget.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
19Exact matchHampstead, NH, United StatesHQ recorded Oct 26, 202611-5012 contacts →

Exact match

“Water Energy Distributors, Inc, is the northeast leader in the geothermal HVAC industry.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
20Exact matchWilmington, DE, United StatesHQ recorded Oct 26, 202611-5011 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
21Exact matchBallston Spa, NY, United StatesHQ recorded Oct 26, 202611-5010 contacts →

Exact match

“Aztech Geothermal, LLC offers a comprehensive solution for renewable geothermal heating and cooling systems in residential and commercial buildings with recognized expertise in…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
22Exact matchSan Francisco, CA, United StatesHQ recorded Oct 26, 202611-5010 contacts →

Exact match

“Veizades and Associates, INC.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
23Exact matchMedford, MA, United StatesHQ recorded Oct 26, 202611-507 contacts →

Exact match

“We design, manufacture, and supply high-performance industrial parts for power plants and advanced energy systems.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
24Exact matchDallas, TX, United StatesHQ recorded Oct 26, 202611-507 contacts →

Exact match

“GTW Designs, Constructs & Operates Econimic NEXT GEOTHERMAL SYSTEMS: •‘Deep Decarbonized’ High Heat for Industry Clients using >220 Deg C • Direct baseload high heat (MMBTU) & MWe…”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
25Exact matchIndianapolis, IN, United StatesHQ recorded Oct 26, 202611-506 contacts →

Exact match

“Indiana Geothermal provides geothermal products, custom system designs and hundreds of earth loop installations each year.”

Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase

Showing 25 of 78 geothermal power plants suppliers based in the United States

See the full list, filter by size, metro and specialty, and access 3,074 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal power plants suppliers based in the United States at a glance

As of Oct 26, 2026
40.3%Verified-email coverage
97.8Average contacts per company
11-50Median size (employees)
12.8%Largest-city concentration · Houston
Oct 26, 2026Page data refreshed

Companies by employee count

1-10
29
11-50
30
51-200
11
201-500
1
501-1,000
3
1,001-5,000
4

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 78 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “geothermal power plants suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 3,074 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 26, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geothermal power plants suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal power plants suppliers are there based in the United States?

RevenueBase identified 78 company matches for geothermal power plants suppliers associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Calpine tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal power plants suppliers?

Houston leads with 10 company records, followed by Austin (5) and Reno (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,074 professional contacts with verified work emails tracked across these 78 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 26, 2026.

Ready to reach these companies? Verified emails and direct dials for all 78 geothermal power plants suppliers based in the United States. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.