Company lists · Data refreshed September 2026

Top 22 Residential energy efficiency companies based in Finland

Name: Residential energy efficiency companies based in Finland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 38 companies tracked

RevenueBase identified 38 residential energy efficiency companies headquartered in Finland as of September 2026 and tracks 316 professional contacts across them, including 170 with verified work emails. Espoo is the largest hub.

This list covers residential energy efficiency companies 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

38Companies

316Contacts tracked

170Verified emails

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The 22 largest residential energy efficiency companies based in Finland

Ranked by team size

Top 22 of 38 residential energy efficiency companies 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 residential energy efficiency companies: 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	VÄRE	Partial evidence	Kuopio, FinlandHQ checked Sep 17, 2026	51-200	66 contacts →
	Partial evidence “Väre on valtakunnallinen energiapalveluyhtiö, joka tarjoaa sähköenergiaa ja moderneja energiapalveluja yrityksille, taloyhtiöille ja julkiselle yhteisöille sekä kuluttajille.” Source: RevenueBase Database · checked Sep 17, 2026
2	Leasegreen	Partial evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	34 contacts →
	Partial evidence “LeaseGreen on suurten kiinteistöjen energiatalouden parantaja ja ilmastotekojen moottori.” Source: RevenueBase Database · checked Sep 17, 2026
3	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
4	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
5	Vatajankoski	Partial evidence	Kankaanpää, FinlandHQ checked Sep 17, 2026	51-200	18 contacts →
	Partial evidence “Vatajankoski on uuden energian yhtiö, joka säästää energiaa – ja lopun se tuottaa kotimaisilla ja uusiutuvilla polttoaineilla.” Source: RevenueBase Database · checked Sep 17, 2026
6	Solarvoima	Partial evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “Solarvoima makes Solar Energy available for home owners, businesses, schools, non-profits and government organizations.” Source: RevenueBase Database · checked Sep 17, 2026
7	Franklin OY	Partial evidence	Helsinki, FinlandHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “Energiaa, tehokkuutta ja energiatehokkuutta!” Source: RevenueBase Database · checked Sep 17, 2026
8	Finess Energy OY	Partial evidence	Turku, FinlandHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Finess Energy Oy toteuttaa avaimet käteen -energiaratkaisuja teollisuudelle ja kiinteistöille.” Source: RevenueBase Database · checked Sep 17, 2026
9	Talotohtori 2.0 Enermix OY	Strong evidence	Tampere, FinlandHQ checked Sep 17, 2026	11-50	13 contacts →
	Strong evidence “Enermix Oy provides energy optimization services for residential and commercial real estate portfolios, helping property owners and property managers reduce energy costs through…” Source: RevenueBase Database · checked Sep 17, 2026
10	Lämpöpartio OY	Partial evidence	Kokkola, FinlandHQ checked Sep 17, 2026	51-200	11 contacts →
	Partial evidence “Lämpöpartio toteuttaa elämää kestäviä energiaratkaisuja.” Source: RevenueBase Database · checked Sep 17, 2026
11	Innoair OY	Partial evidence	Vantaa, FinlandHQ checked Sep 17, 2026	11-50	9 contacts →
	Partial evidence “Innoair Oy myy, suunnittelee ja asentaa energiatehokkaat ilmastointi, ilmanvaihto- ja lämmitysratkaisut kuluttajille, teollisuuteen ja yrityksille.” Source: RevenueBase Database · checked Sep 17, 2026
12	Optiwatti OY	Indirect evidence	Espoo, FinlandHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence “Our mission in OptiWatti is to fight against climate change.” Source: RevenueBase Database · checked Sep 17, 2026
13	Buildwise Group OY	Partial evidence	Tampere, FinlandHQ checked Sep 17, 2026	1-10	7 contacts →
	Partial evidence “Kiinteistöjen energiatehokkuuden asiantuntijayritys.” Source: RevenueBase Database · checked Sep 17, 2026
14	Enreport	Partial evidence	Espoo, FinlandHQ checked Sep 17, 2026	1-10	7 contacts →
	Partial evidence “We provide software solutions to decrease energy consumption and CO2 emissions to commercial and industrial companies” Source: RevenueBase Database · checked Sep 17, 2026
15	Suomen Energiainsinöörit OY	Partial evidence	Helsinki, FinlandHQ checked Sep 17, 2026	1-10	4 contacts →
	Partial evidence “Energiatehokkuuden parantaminen Useimmissa rakennuksissa voidaan energiatehokkuutta parantaa edullisilla teknisillä ratkaisuilla.” Source: RevenueBase Database · checked Sep 17, 2026
16	Pistoke OY	Partial evidence	Vantaa, FinlandHQ checked Sep 17, 2026	1-10	3 contacts →
	Partial evidence “Pistoke Oy auttaa suomalaisia kiinteistönomistajia ja rakennuttajia pienentämään rakennusten hiilidioksidipäästöjä ja saavuttamaan korkean lämmityksen energiaomavaraisuuden.” Source: RevenueBase Database · checked Sep 17, 2026
17	Wahlres	Partial evidence	Vantaa, FinlandHQ checked Sep 17, 2026	1-10	3 contacts →
	Partial evidence “Wahlres Oy was founded in 2016 and aims to reduce the reliance of Finnish buildings on non-renewable energy sources.” Source: RevenueBase Database · checked Sep 17, 2026
18	Energy Plus Engineering OY	Indirect evidence	Lappeenranta, FinlandHQ checked Sep 17, 2026	1-10	3 contacts →
	Indirect evidence “Our value proposition is to assist real estate owners to make better return on their assets.” Source: RevenueBase Database · checked Sep 17, 2026
19	Lämpöjokeri OY	Partial evidence	Lahti, FinlandHQ checked Sep 17, 2026	11-50	2 contacts →
	Partial evidence “Vihreä siirtymä, uusiutuva energia, hiilineutraali tulevaisuus?” Source: RevenueBase Database · checked Sep 17, 2026
20	ENION	Partial evidence	Tampere, FinlandHQ checked Sep 17, 2026	1-10	2 contacts →
	Partial evidence “Automating energy consumption in homes and real estate.” Source: RevenueBase Database · checked Sep 17, 2026
21	Energion	Partial evidence	Jyväskylä, FinlandHQ checked Sep 17, 2026	51-200	1 contacts →
	Partial evidence “Olemme kiinteistöjen energiaremontointiin ja energiatehokkuuden optimointiin erikoistunut yritys.” Source: RevenueBase Database · checked Sep 17, 2026
22	Enerwise OY	Partial evidence	Mikkeli, FinlandHQ checked Sep 17, 2026	1-10	1 contacts →
	Partial evidence “Energiaratkaisujen asiantuntija.” 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: residential energy efficiency 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 residential energy efficiency companies.
Partial evidence: Its own public description names part of residential energy efficiency companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name residential energy efficiency 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 22 of 38 residential energy efficiency companies based in Finland

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Residential energy efficiency companies based in Finland at a glance

As of Sep 17, 2026

53.8%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

18.4%Largest-city concentration · Espoo

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 38 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 residential energy efficiency 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 Finland whose own description of what they do matches “residential energy efficiency 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 residential energy efficiency 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 residential energy efficiency companies, 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, 170 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 residential energy efficiency 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 residential energy efficiency companies are there based in Finland?

RevenueBase identified 38 residential energy efficiency companies 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?

VÄRE, headquartered in Kuopio, tops this list with the largest team on record.

Which city has the most residential energy efficiency companies?

Espoo leads with 7 headquartered companies, followed by Vantaa (5) and Helsinki (3).

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 170 verified decision-maker contacts tracked across these 38 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.