Company lists · Data refreshed October 2026

Top 25 Geothermal energy project developers worldwide

RevenueBase identified 1,198 company matches for geothermal energy project developers worldwide as of October 2026 and tracks 31,580 professional contacts across them, including 8,715 with verified work emails. The United States is the largest market and Calgary the largest hub.

This list covers company matches for geothermal energy project developers 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 October 13, 2026. Country and city lists for geothermal energy project developers 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 Oct 13, 2026 How this list was built
1,198Companies
31,580Contacts tracked
8,715Verified emails
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The 25 largest geothermal energy project developers worldwide

Ranked by team size
Top 25 of 1,198 company matches for geothermal energy project developers worldwide, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchRome, ItalyHQ recorded Oct 13, 20265,001-10,0004,769 contacts →

Exact match

“We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2Exact matchNairobi, KenyaHQ recorded Oct 13, 20261,001-5,0002,112 contacts →

Exact match

“Kenya Electricity Generating Company PLC (KenGen) is the leading electric power generating company in East Africa.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
4Exact matchPasig City, PhilippinesHQ recorded Oct 13, 20261,001-5,0001,856 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 · Oct 13, 2026 · View company records in RevenueBase
5Exact matchGambir, IndonesiaHQ recorded Oct 13, 2026201-5001,420 contacts →

Exact match

“Indonesia Geothermal Company”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6Exact matchReno, NV, United StatesHQ recorded Oct 13, 20261,001-5,0001,298 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
7Exact matchWiesbaden, GermanyHQ recorded Oct 13, 20261,001-5,000767 contacts →

Exact match

“Founded in 1996, ABO Energy (fomerly known as ABO Wind) is among Europe’s leading developers of renewable energy projects.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8Exact matchJakarta Selatan, IndonesiaHQ recorded Oct 13, 2026201-500586 contacts →

Exact match

“PT Geo Dipa Energi (Persero) is a State-Owned Company specializing in Geothermal Energy”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9Exact matchMexicoHQ recorded Oct 13, 2026201-500461 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 · Oct 13, 2026 · View company records in RevenueBase
10Exact matchJakarta Selatan, IndonesiaHQ recorded Oct 13, 2026201-500301 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 · Oct 13, 2026 · View company records in RevenueBase
11Exact matchHouston, CA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
12Exact matchUnited StatesHQ recorded Oct 13, 2026201-500185 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 · Oct 13, 2026 · View company records in RevenueBase
13Exact matchMakati City, PhilippinesHQ recorded Oct 13, 2026201-500171 contacts →

Exact match

“The Philippine Geothermal Production Company, Inc.(PGPC) is a 100% Filipino corporation operating the Tiwi and Mak-Ban geothermal steam fields and is committed to operating in a…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14Exact matchSilver Spring, MD, United StatesHQ recorded Oct 13, 202651-200168 contacts →

Exact match

“Competitive Power Ventures (CPV) has 25 years of unprecedented success in the development and operation of highly efficient and low emitting electric generation and renewable…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15Exact matchParis, FranceHQ recorded Oct 13, 202651-200165 contacts →

Exact match

“Depuis 2004, JP Energie Environnement développe, finance, construit et exploite des unités de production d’électricité d’origine renouvelables dans tous les domaines d’activités …”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16Exact matchParis, FranceHQ recorded Oct 13, 2026201-500163 contacts →

Exact match

“EDF PEI - Production Electrique Insulaire -est un acteur majeur de la production d’électricité dans les zones non-interconnectées.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17Exact matchVienne, AustriaHQ recorded Oct 13, 2026201-500163 contacts →

Exact match

“RP Global is a large-scale developer with 40+ years of experience in the renewable energy sector.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18Exact matchUnited StatesHQ recorded Oct 13, 2026201-500152 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 · Oct 13, 2026 · View company records in RevenueBase
19Exact matchMumbai, IndiaHQ recorded Oct 13, 202651-200148 contacts →

Exact match

“Radiance Renewables, backed by Eversource Capital, specialises in delivering comprehensive green solutions tailored for commercial and industrial clients (C&I).”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20Exact matchAhmedabad, IndiaHQ recorded Oct 13, 2026201-500148 contacts →

Exact match

“Opera Energy (Opera Group) is a leading renewable energy developer committed to providing customized solutions for independent power producers and commercial and industrial…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21Exact matchChuo-ku, JapanHQ recorded Oct 13, 2026201-500136 contacts →

Exact match

“RENOVA is an independent renewable energy developer and power producer.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22Exact matchIcelandHQ recorded Oct 13, 202651-200132 contacts →

Exact match

“ABOUT http://iceland-drilling.com/ Iceland Drilling Ltd is a leading high technical company in the field of high temperature geothermal drilling and has many decades of experience…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23Exact matchMount Kisco, NY, United StatesHQ recorded Oct 13, 202651-200130 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
24Exact matchAnkara, TürkiyeHQ recorded Oct 13, 20261,001-5,000123 contacts →

Exact match

“Bilgi birikimini yatırıma ve tasarrufa dönüştürmek için çalışmalarını 1990 yılından bu yana sürdüren Doğan Jeotermal Group ülkemizin sahip olduğu jeotermal enerji kaynaklarını…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25Exact matchSouth Jakarta, SingaporeHQ recorded Oct 13, 2026201-500119 contacts →

Exact match

“KS Orka Renewables is one of the most ambitious geothermal developers in the world.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase

Showing 25 of 1,198 geothermal energy project developers worldwide

See the full list, filter by size, metro and specialty, and access 8,715 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal energy project developers worldwide at a glance

As of Oct 13, 2026
27.6%Verified-email coverage
26.4Average contacts per company
1-10Median size (employees)
1.6%Largest-city concentration · Calgary
Oct 13, 2026Page data refreshed

Companies by employee count

1-10
607
11-50
409
51-200
126
201-500
21
501-1,000
17
1,001-5,000
12
5,001-10,000
1
10001+
1

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 energy project developers are linked below.
What qualifies
Company records worldwide whose business descriptions match “geothermal energy project developers” 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 8,715 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 energy project developers by location

10 lists · largest first

Every Geothermal energy project developers 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 energy project developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal energy project developers are there worldwide?

RevenueBase identified 1,198 company matches for geothermal energy project developers worldwide 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?

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

Which country has the most geothermal energy project developers?

The United States leads with 199 companies, followed by Germany (73) and Canada (57). Every geothermal energy project developers list by country and city is linked on this page.

Which city has the most geothermal energy project developers?

Calgary leads with 19 company records, followed by London (16) and Houston (15).

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 8,715 professional contacts with verified work emails tracked across these 1,198 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.