Company lists · Data refreshed September 2026
Top 24 Geothermal companies based in Iceland
RevenueBase identified 37 geothermal companies headquartered in Iceland as of September 2026 and tracks 1,391 professional contacts across them, including 250 with verified work emails. Reykjavik is the largest hub.
This list covers geothermal companies headquartered in Iceland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 15, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 24 largest geothermal companies based in Iceland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 298 contacts → | ||||
Indirect evidence “Landsvirkjun is owned by the Icelandic state and processes 75% of all electricity used in Iceland.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 2 | 212 contacts → | ||||
Strong evidence “Founded in 1992, Blue Lagoon Iceland has long been a sustainable destination due to the beneficial powers of its famed geothermal seawater.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 3 | 186 contacts → | ||||
Strong evidence “Orkuveitan (Reykjavík Energy) provides electricity, geothermal water, cold water, carbon storage and a state-of-the-art fibre optic network through four subsidiaries: Veitur, ON…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 4 | 136 contacts → | ||||
Indirect evidence “Mannvit, is now part of COWI.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 5 | 128 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 6 | 77 contacts → | ||||
Indirect evidence “HS Orka is the largest privately owned power company in Iceland.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 7 | 72 contacts → | ||||
Strong evidence “ON Power produces and sells geothermally generated electricity for the Icelandic market.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 8 | 64 contacts → | ||||
Strong evidence “Iceland GeoSurvey, ÍSOR, is a leading provider of scientific and technical expertise to the geothermal industry.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 9 | 21 contacts → | ||||
Strong evidence “Reykjavík Geothermal is a global leader in geothermal energy development, specializing in delivering clean, reliable, and renewable power, heating, and cooling.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 10 | 16 contacts → | ||||
Strong evidence “At Arctic Green Energy, we are driving the global clean energy transition with geothermal solutions that transform how cities are heated, cooled, and powered.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 11 | 16 contacts → | ||||
Indirect evidence “Westfjord Power Company (Orkubu Vestfjarda) was founded in 1977 and began operation on the 1.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 12 | 15 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 13 | 10 contacts → | ||||
Indirect evidence “Eignarhaldsfélagið Hornsteinn á og rekur þrjú dótturfélög sem öll eiga sér rótgróna sögu á Íslandi sem rekja má allt aftur til fyrri hluta síðustu aldar.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Strong evidence “EIMUR is a public-private partnership/cluster focused on energy, geothermal resource utilization, and innovation in Northeast Iceland.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 contacts → | ||||
Strong evidence “While Iceland started harnessing geothermal energy in the beginning of the 20th century, Icelanders had used natural geothermal springs for bathing and washing for centuries.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Strong evidence “We provide expertise services in development and operations of renewable power schemes with main emphasis on hydro power and geothermal power plants.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Strong evidence “GeoSea is not only a world-class geothermal bathing mecca, it is an experience that taps into the historical roots of a small fishing town in North Iceland that has harnessed the…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 contacts → | ||||
Indirect evidence “The Iceland Renewable Energy Cluster is a cluster organization founded formally in 2013 after several years of mapping and implementation.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Strong evidence “Geotropy ehf, is an Iceland based company registered to work in the field of Geothermal.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Strong evidence “ThinkGeoEnergy is the leading news & research platform for the global geothermal energy sector.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Strong evidence “GEORG is a non-profit research driven geothermal cluster initiative that brings together players in the geothermal field to form a strong force for rapid progress and value…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Indirect evidence “North Tech Energy specializes in providing environmentally-friendly drilling solutions to companies around the world, with over a decade of experience in proficient and adaptive…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Indirect evidence “Building MW-scale inertial evaporators that efficiently convert industrial waste warmth into energized, valuable process steam.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: geothermal companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names geothermal companies.
- Partial evidence
- Its own public description names part of geothermal companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name geothermal companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 24 of 37 geothermal companies based in Iceland
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Geothermal companies based in Iceland at a glance
As of Sep 15, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Iceland, so it is reported there. Company counts and contact totals on this page are exact for Iceland, over 37 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among geothermal companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Iceland whose own description of what they do matches “geothermal companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names geothermal companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among geothermal companies, and records with no verified work email. Companies headquartered outside Iceland are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 250 across the full list. 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 15, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names geothermal companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many geothermal companies are there based in Iceland?
RevenueBase identified 37 geothermal companies headquartered in Iceland as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Landsvirkjun, headquartered in Reykjavik, tops this list with the largest team on record.
Which city has the most geothermal companies?
Reykjavik leads with 22 headquartered companies, followed by Akureyri (2) and Gardabaer (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 250 verified decision-maker contacts tracked across these 37 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 15, 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 Smart Search, 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.