Company lists · Data refreshed September 2026

Top 25 Geothermal installation companies worldwide

Name: Geothermal installation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 6,900 companies tracked

RevenueBase identified 6,900 company matches for geothermal installation companies worldwide as of September 2026 and tracks 44,825 professional contacts across them, including 11,213 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for geothermal installation companies worldwide, 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 September 20, 2026. Country and city lists for geothermal installation companies follow the table.

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 Sep 20, 2026 How this list was built

6,900Companies

44,825Contacts tracked

11,213Verified emails

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The 25 largest geothermal installation companies worldwide

Ranked by team size

Top 25 of 6,900 company matches for geothermal installation companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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	Energy Development Corporation	Exact match	Pasig City, PhilippinesHQ recorded Sep 20, 2026	1,001-5,000	1,719 contacts →
	Exact match “The Energy Development Corporation (EDC) is a pioneer in generating 100% clean, renewable, and reliable power as an electricity supplier in the Philippines for over 40 years.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,281 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	PT GEO Dipa Energi Persero	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 20, 2026	201-500	501 contacts →
	Exact match “PT Geo Dipa Energi (Persero) is a State-Owned Company specializing in Geothermal Energy” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Constructora Y Perforadora Latina, S.A. DE C.V	Exact match	MexicoHQ recorded Sep 20, 2026	201-500	429 contacts →
	Exact match “Constructora y Perforadora LATINA (“LATINA”) Es una empresa privada con mas de 60 años de experiencia en el sector de energía y actualmente es la principal empresa en…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Semper Solaris	Exact match	El Cajon, CA, United StatesHQ recorded Sep 20, 2026	501-1,000	337 contacts →
	Exact match “Ranked #1 in Solar + Battery Installation in America by "Solar Power World" Go Solar American Style!#1 Veteran Owned Solar Company in California Solar Panels.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Supreme Energy	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 20, 2026	201-500	271 contacts →
	Exact match “Supreme Energy Group of Companies (SEML/SERD/SERB), a growing Multinational Energy Companies with its core business on renewable energy Geothermal Power Plant.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Thermaprime Drilling Corporation	Exact match	Pasig, PhilippinesHQ recorded Sep 20, 2026	501-1,000	247 contacts →
	Exact match “Thermaprime Drilling Corporation Geothermal, Oil & Gas Drilling BASIC SERVICES Well Construction Management • Drilling of geothermal wells • Drilling of onshore oil and gas wells…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Grupo IPS	Exact match	Conroe, TX, United StatesHQ recorded Sep 20, 2026	51-200	245 contacts →
	Exact match “IPS is an integrated oilfield service company with over 20 years in the business.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Reliable Heating & AIR	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 20, 2026	201-500	231 contacts →
	Exact match “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Sep 20, 2026	201-500	224 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	Tolin Mechanical Systems	Exact match	Denver, CO, United StatesHQ recorded Sep 20, 2026	201-500	220 contacts →
	Exact match “Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Airtron Heating & AIR Conditioning	Exact match	Columbus, OH, United StatesHQ recorded Sep 20, 2026	1,001-5,000	214 contacts →
	Exact match “Airtron has developed itself into one of the leading heating, ventilation, and air conditioning (HVAC) providers.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Fervo Energy	Exact match	Houston, CA, United StatesHQ recorded Sep 20, 2026	51-200	213 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 · Sep 20, 2026 · View company records in RevenueBase
14	Saman Groep	Exact match	Zierikzee, NetherlandsHQ recorded Sep 20, 2026	201-500	211 contacts →
	Exact match “De energietransitie is één van de grootste maatschappelijke opgaven, maar wij begrijpen dat jouw wooncomfort net zo belangrijk is.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Haller Enterprises	Exact match	Lititz, PA, United StatesHQ recorded Sep 20, 2026	201-500	191 contacts →
	Exact match “Since 1981, Haller Enterprises has proudly served central and eastern Pennsylvania as a leader in heating, cooling, plumbing, and electrical services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Haynes Mechanical Systems	Exact match	Greenwood Village, CO, United StatesHQ recorded Sep 20, 2026	201-500	190 contacts →
	Exact match “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Marriott Drilling Group	Exact match	United StatesHQ recorded Sep 20, 2026	201-500	183 contacts →
	Exact match “Marriott Drilling Group is the UK’s only remaining truly independent land Drilling Specialist, trusted for over 75 years to deliver safe, efficient and technically robust drilling…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Inplag	Exact match	Wrocław, PolandHQ recorded Sep 20, 2026	201-500	174 contacts →
	Exact match “INPLAG Spółka z o.o.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Sep 20, 2026	201-500	168 contacts →
	Exact match “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Energieversum EIN Unternehmen DER Enbw Gruppe	Exact match	Steinhagen, GermanyHQ recorded Sep 20, 2026	201-500	162 contacts →
	Exact match “Mit Premium-Photovoltaikanlagen und Wärmepumpen im Komplettpaket erleichtern wir seit 2010 Privat- und Gewerbekunden bundesweit den Umstieg auf eine unabhängige, nachhaltige…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	GSM Services	Exact match	Gastonia, NC, United StatesHQ recorded Sep 20, 2026	201-500	159 contacts →
	Exact match “For nearly a century, GSM Services has built its reputation on reliability, honesty, expert service, and high-quality workmanship.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	ETECK	Exact match	Voorburg, NetherlandsHQ recorded Sep 20, 2026	51-200	149 contacts →
	Exact match “Eteck levert duurzame energie in de vorm van koude en warmte.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	Egesim Group	Exact match	Gebze, TürkiyeHQ recorded Sep 20, 2026	201-500	149 contacts →
	Exact match “EGESIM, founded in 1994, is an energy solutions company focused on industrial electrical and automation systems and EPC (engineering, procurement and construction) of geothermal…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Swale Heating Part Of Sureserve	Exact match	Sittingbourne, United KingdomHQ recorded Sep 20, 2026	201-500	136 contacts →
	Exact match “As an established heating company based in Kent, Swale Heating are proud to offer expert guidance in choosing the best heating and boiler systems & products available today.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	AP Renewables Inc. Aboitizpower Geothermal Unit	Exact match	United StatesHQ recorded Sep 20, 2026	201-500	133 contacts →
	Exact match “Aboitiz Power Corporation (AboitizPower, AP) is a leader in the Philippine Electric Power Industry with a portfolio of assets located across the country.” Recorded in the RevenueBase company graph · Sep 20, 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 installation 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 6,900 geothermal installation companies worldwide

See the full list, filter by size, metro and specialty, and access 11,213 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal installation companies worldwide at a glance

As of Sep 20, 2026

25.0%Verified-email coverage

6.5Average contacts per company

1-10Median size (employees)

0.5%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

3,746

11-50

2,417

51-200

494

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for geothermal installation companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “geothermal installation 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. 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 11,213 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 September 20, 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 installation companies by location

21 lists · largest first

Every Geothermal installation companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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

How many geothermal installation companies are there worldwide?

RevenueBase identified 6,900 company matches for geothermal installation companies worldwide as of September 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?

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

Which country has the most geothermal installation companies?

The United States leads with 1,695 companies, followed by France (734) and the United Kingdom (438). Every geothermal installation companies list by country and city is linked on this page.

Which city has the most geothermal installation companies?

London leads with 33 company records, followed by Madrid (32) and Houston (25).

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 11,213 professional contacts with verified work emails tracked across these 6,900 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 September 20, 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.