Company lists · Data refreshed October 2026

Top 25 Geothermal engineering companies based in the United States

Name: Geothermal engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 323 companies tracked

RevenueBase identified 323 company matches for geothermal engineering companies associated with the United States as of October 2026 and tracks 5,512 professional contacts across them, including 2,073 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal engineering companies 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 13, 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 13, 2026 How this list was built

323Companies

5,512Contacts tracked

2,073Verified emails

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The 25 largest geothermal engineering companies based in the United States

Ranked by team size

Top 25 of 323 company matches for geothermal engineering companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,298 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Scmi INC	Exact match	Houston, TX, United StatesHQ recorded Oct 13, 2026	n/a	545 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	RRC Companies	Exact match	Round Rock, TX, United StatesHQ recorded Oct 13, 2026	201-500	544 contacts →
	Exact match “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Fervo Energy	Exact match	Houston, CA, United StatesHQ recorded Oct 13, 2026	51-200	270 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 13, 2026 · View company records in RevenueBase
5	Grupo IPS	Exact match	Conroe, TX, United StatesHQ recorded Oct 13, 2026	51-200	249 contacts →
	Exact match “IPS is an integrated oilfield service company with over 20 years in the business.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Dandelion Energy	Exact match	Mount Kisco, NY, United StatesHQ recorded Oct 13, 2026	51-200	130 contacts →
	Exact match “Dandelion Energy is the nation’s leading residential geothermal provider, on a mission to make the world’s most efficient heating and cooling technology accessible to everyone.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Blade Energy Partners	Exact match	Frisco, TX, United StatesHQ recorded Oct 13, 2026	51-200	108 contacts →
	Exact match “Founded in Blade Energy Partners is an independent consulting company known for overcoming the challenges of complex multidisciplinary projects in the oil, gas, and geothermal…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Zanskar	Exact match	Salt Lake City, UT, United StatesHQ recorded Oct 13, 2026	51-200	105 contacts →
	Exact match “Powering the future with the Earth’s hidden heat.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Brightcore Energy	Exact match	Armonk, NY, United StatesHQ recorded Oct 13, 2026	51-200	103 contacts →
	Exact match “Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Hayden Industrial	Exact match	Tulsa, OK, United StatesHQ recorded Oct 13, 2026	201-500	101 contacts →
	Exact match “Hayden is a technology and engineering company that builds critical infrastructure for compute, energy and thermal performance.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Enertech Global, LLC	Exact match	Greenville, IL, United StatesHQ recorded Oct 13, 2026	51-200	76 contacts →
	Exact match “Enertech Global is a leading manufacturer and visionary in the geothermal heating and cooling industry.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Zonge International	Exact match	Reno, NV, United StatesHQ recorded Oct 13, 2026	51-200	68 contacts →
	Exact match “Minerals / Geothermal / Groundwater / Petroleum / Environmental / Infrastructure Are you concerned about ensuring every opportunity for success for your project and stakeholders?” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Quaise Energy	Exact match	Houston, MA, United StatesHQ recorded Oct 13, 2026	51-200	66 contacts →
	Exact match “Quaise develops superhot geothermal power plants for a terawatt-scale world.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Mcphail Associates, LLC	Exact match	Burlington, MA, United StatesHQ recorded Oct 13, 2026	51-200	63 contacts →
	Exact match “Since 1976 McPhail Associates has been providing geotechnical engineering services to architects, owners, contractors, institutions, and developers.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	BD Energy Systems, LLC	Exact match	Houston, TX, United StatesHQ recorded Oct 13, 2026	51-200	55 contacts →
	Exact match “BD Energy Systems LLC located in Houston, TX, USA is a world leading engineering company operating in the Petrochemical, Fertilizer, Refining, and Gas Processing industry…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Darcy Solutions	Exact match	New Brighton, MN, United StatesHQ recorded Oct 13, 2026	11-50	52 contacts →
	Exact match “Darcy Solutions is on a mission to put Geothermal Everywhere.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Allied Well Drilling	Exact match	Laurel, MD, United StatesHQ recorded Oct 13, 2026	51-200	52 contacts →
	Exact match “We at Allied Well Drilling are a full service commercial and residential gethermal heating/cooling system installer, specializing in vertically drilled closed loop systems.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Agilitech	Exact match	Bakersfield, CA, United StatesHQ recorded Oct 13, 2026	201-500	46 contacts →
	Exact match “Agilitech has been engineering and building in industrial environments since 2002, across oil and gas, food and beverage, water and wastewater, and commercial facilities.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	XGS Energy	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 13, 2026	11-50	33 contacts →
	Exact match “XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	EDEN	Exact match	Somerville, MA, United StatesHQ recorded Oct 13, 2026	11-50	33 contacts →
	Exact match “Eden is a leader in sustainable natural resource recovery.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Lettis Consultants International, INC	Exact match	Concord, CA, United StatesHQ recorded Oct 13, 2026	11-50	32 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Midwest Geothermal	Exact match	Grand Rapids, MI, United StatesHQ recorded Oct 13, 2026	11-50	28 contacts →
	Exact match “Geothermal Systems are becoming a critical component in the effort to make buildings more environmentally friendly.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Bedrock Energy	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 2026	11-50	27 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 13, 2026 · View company records in RevenueBase
24	Greenfire Energy INC	Exact match	Oklahoma City, OK, United StatesHQ recorded Oct 13, 2026	11-50	25 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 13, 2026 · View company records in RevenueBase
25	Project Innerspace	Exact match	Houston, United StatesHQ recorded Oct 13, 2026	11-50	24 contacts →
	Exact match “Project InnerSpace (InnerSpace) is a multi-phase initiative focused on accelerating global geothermal prospecting and development.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “geothermal engineering companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 323 geothermal engineering companies based in the United States

See the full list, filter by size, metro and specialty, and access 2,073 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal engineering companies based in the United States at a glance

As of Oct 13, 2026

37.6%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

8.0%Largest-city concentration · Houston

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

172

11-50

114

51-200

201-500

1,001-5,000

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 323 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 engineering companies” 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 2,073 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 13, 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.

Geothermal engineering companies by metro

Geothermal engineering companies in Houston26

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 engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal engineering companies are there based in the United States?

RevenueBase identified 323 company matches for geothermal engineering companies 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?

Ormat Technologies, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal engineering companies?

Houston leads with 26 company records, followed by Denver (8) and Reno (8).

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 2,073 professional contacts with verified work emails tracked across these 323 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 13, 2026.

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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.