Company lists · Data refreshed September 2026

Top 25 Renewable energy IT service providers based in Finland

Name: Renewable energy IT service providers based in Finland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 95 companies tracked

RevenueBase identified 95 renewable energy IT service providers headquartered in Finland as of September 2026 and tracks 1,828 professional contacts across them, including 954 with verified work emails. Helsinki is the largest hub.

This list covers renewable energy IT service providers headquartered in Finland, 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 17, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

95Companies

1,828Contacts tracked

954Verified emails

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The 25 largest renewable energy IT service providers based in Finland

Ranked by team size

Top 25 of 95 renewable energy IT service providers based in Finland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy IT service providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Wärtsilä Energy	Strong evidence	Helsinki, FinlandHQ checked Sep 17, 2026	10001+	940 contacts →
	Strong evidence “Wärtsilä leads the transition towards a 100% renewable energy future.” Source: RevenueBase Database · checked Sep 17, 2026
2	Attido	Partial evidence	Espoo, FinlandHQ checked Sep 17, 2026	51-200	53 contacts →
	Partial evidence “Attido is an expertise-driven IT company, established in 2001.” Source: RevenueBase Database · checked Sep 17, 2026
3	Routa Digital	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	51-200	52 contacts →
	Indirect evidence “Rooted in equality, trust and sustainability, we create clear and practical solutions that solve complex challenges - making technology meaningful, responsible, and accessible for…” Source: RevenueBase Database · checked Sep 17, 2026
4	Elisa Appelsiini	Indirect evidence	Helsinki, FinlandHQ checked Sep 17, 2026	201-500	50 contacts →
	Indirect evidence “Elisa, the leading provider of communications services, has acquired all of the issued shares of Elisa Appelsiini Finland Oy on 5th November 2010.” Source: RevenueBase Database · checked Sep 17, 2026
5	Enter Systemsolutions OY	Partial evidence	Turku, FinlandHQ checked Sep 17, 2026	11-50	45 contacts →
	Partial evidence “Enter SystemSolutions Oy on vuonna 1997 perustettu korkeaan käytettävyyteen keskittynyt IT-ympäristöjen erikoisosaaja.” Source: RevenueBase Database · checked Sep 17, 2026
6	Teamit	Partial evidence	Helsinki, FinlandHQ checked Sep 17, 2026	51-200	44 contacts →
	Partial evidence “Experienced IT experts and sustainable software solutions.” Source: RevenueBase Database · checked Sep 17, 2026
7	Nepower	Strong evidence	Vaasa, FinlandHQ checked Sep 17, 2026	51-200	37 contacts →
	Strong evidence “NEPower delivers electrification solutions for the industrial, grid and renewable energy sectors.” Source: RevenueBase Database · checked Sep 17, 2026
8	Etha OY	Partial evidence	Vaasa, FinlandHQ checked Sep 17, 2026	11-50	35 contacts →
	Partial evidence “We use our pioneering experience originating in wind power to help our customers seize the opportunities of the green transition in all fields of sustainable energy production.” Source: RevenueBase Database · checked Sep 17, 2026
9	Höyrytys OY	Partial evidence	Uusimaa, FinlandHQ checked Sep 17, 2026	11-50	29 contacts →
	Partial evidence “Höyrytys Oy on kokonaisvaltainen energiapalvelujen tuottaja, joka toteuttaa asiakkailleen joustavia energiaratkaisuja lämmön, höyryn ja sähkön tuotantoon.” Source: RevenueBase Database · checked Sep 17, 2026
10	1komma5 Suomi	Partial evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	28 contacts →
	Partial evidence “At 1KOMMA5° Suomi (formerly Solar Age Oy), we believe in making it easy for people to access solar power solutions for their homes, businesses, and farms.” Source: RevenueBase Database · checked Sep 17, 2026
11	Lemkem	Partial evidence	Lahti, FinlandHQ checked Sep 17, 2026	51-200	25 contacts →
	Partial evidence “Lemkem is the leading turnkey sustainable energy solutions provider in Finland.” Source: RevenueBase Database · checked Sep 17, 2026
12	Atoz OY	Indirect evidence	Tampere, FinlandHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “AtoZ is a company on a mission to create a better digital future for like-minded sustainable companies.” Source: RevenueBase Database · checked Sep 17, 2026
13	Enico OY	Strong evidence	Tampere, FinlandHQ checked Sep 17, 2026	1-10	22 contacts →
	Strong evidence “Enico offers wide-ranging production, manufacturing and project services in the field of renewable energy.” Source: RevenueBase Database · checked Sep 17, 2026
14	Arenso OY Arctic Energy Solutions	Strong evidence	Pori, FinlandHQ checked Sep 17, 2026	51-200	21 contacts →
	Strong evidence “Arenso – Arctic Energy Solutions – provides cutting-edge expertise in sustainable and impactful renewable energy.” Source: RevenueBase Database · checked Sep 17, 2026
15	Forus OY	Indirect evidence	Helsinki, FinlandHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “Forus is a novel finance and sales company that develops services to stop climate-change profitably.” Source: RevenueBase Database · checked Sep 17, 2026
16	Planora OY	Partial evidence	Oulu, FinlandHQ checked Sep 17, 2026	11-50	20 contacts →
	Partial evidence “Planora Oy was founded in 1987 and currently employs over 30 full-time energy engineers and consultants, environmental engineers, energy system designers, software developers and…” Source: RevenueBase Database · checked Sep 17, 2026
17	CFE Finland OY	Partial evidence	Oulu, FinlandHQ checked Sep 17, 2026	11-50	19 contacts →
	Partial evidence “CFE Finland is an independent expert company in energy infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
18	Oomi Solar	Indirect evidence	Vantaa, FinlandHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence “Olemme kotimainen toimija ja kokenut aurinkoenergian asiantuntija.” Source: RevenueBase Database · checked Sep 17, 2026
19	Ekoenergy Ecolabel	Strong evidence	Helsinki, FinlandHQ checked Sep 17, 2026	1-10	19 contacts →
	Strong evidence “EKOenergy is a global nonprofit ecolabel for energy (renewable electricity, renewable gas, heat and cold).” Source: RevenueBase Database · checked Sep 17, 2026
20	CT Industrial OY	Indirect evidence	Haapavesi, FinlandHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “CTI is a company of experts which focus in a field of a complex and innovative technological systems integration for industrial customers.” Source: RevenueBase Database · checked Sep 17, 2026
21	Adesso Finland	Partial evidence	Helsinki, FinlandHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “At adesso Finland, we help businesses unlock their full potential with smart, tailored IT solutions.” Source: RevenueBase Database · checked Sep 17, 2026
22	Tuulia Energy OY	Partial evidence	Pori, FinlandHQ checked Sep 17, 2026	51-200	15 contacts →
	Partial evidence “Cleaner energy in capable hands.” Source: RevenueBase Database · checked Sep 17, 2026
23	LLS Partners OY	Indirect evidence	Sundsberg, FinlandHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence “LLS Partners is a consultancy company based on the entrepreneur driven company model.” Source: RevenueBase Database · checked Sep 17, 2026
24	Project Business OY Finland	Indirect evidence	Lappeenranta, FinlandHQ checked Sep 17, 2026	1-10	10 contacts →
	Indirect evidence “Project Business Oy Finland on vuonna 2004 perustettu asiantuntijayritys, joka on erikoistunut liiketoiminnan digitalisointiin ja siihen liittyviin konsultointipalveluihin.” Source: RevenueBase Database · checked Sep 17, 2026
25	Kotisol OY	Indirect evidence	FinlandHQ checked Sep 17, 2026	51-200	9 contacts →
	Indirect evidence “Kotisol Oy toimittaa aurinkosähköjärjestelmät pientaloihin, maatiloille, yrityskiinteistöihin ja taloyhtiöille.” Source: RevenueBase Database · checked Sep 17, 2026

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: renewable energy IT service providers. 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 renewable energy IT service providers.
Partial evidence: Its own public description names part of renewable energy IT service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy IT service providers. 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 25 of 95 renewable energy IT service providers based in Finland

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Renewable energy IT service providers based in Finland at a glance

As of Sep 17, 2026

52.2%Verified-email coverage

19.2Average contacts per company

1-10Median size (employees)

18.9%Largest-city concentration · Helsinki

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 95 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 renewable energy IT service providers, 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 Finland whose own description of what they do matches “renewable energy IT service providers”. 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 renewable energy IT service providers), 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 renewable energy IT service providers, and records with no verified work email. Companies headquartered outside Finland 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, 954 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 17, 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 renewable energy IT service providers, 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 renewable energy IT service providers are there based in Finland?

RevenueBase identified 95 renewable energy IT service providers headquartered in Finland 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?

Wärtsilä Energy, headquartered in Helsinki, tops this list with the largest team on record.

Which city has the most renewable energy IT service providers?

Helsinki leads with 18 headquartered companies, followed by Espoo (8) and Oulu (8).

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 954 verified decision-maker contacts tracked across these 95 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 17, 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.