Company lists · Data refreshed September 2026

Top 25 Residential energy efficiency companies based in Sweden

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 109 companies tracked

RevenueBase identified 109 residential energy efficiency companies headquartered in Sweden as of September 2026 and tracks 904 professional contacts across them, including 417 with verified work emails. Stockholm is the largest hub.

This list covers residential energy efficiency companies headquartered in Sweden, 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

109Companies

904Contacts tracked

417Verified emails

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The 25 largest residential energy efficiency companies based in Sweden

Ranked by team size

Top 25 of 109 residential energy efficiency companies based in Sweden, 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	Indoor Energy	Partial evidence	Stockholm, SwedenHQ checked Sep 17, 2026	201-500	137 contacts →
	Partial evidence “Våra kunder har de energieffektivaste fastigheterna!” Source: RevenueBase Database · checked Sep 17, 2026
2	KTC	Partial evidence	Askim, SwedenHQ checked Sep 17, 2026	51-200	70 contacts →
	Partial evidence “Med över 30 år i branschen är KTC idag en av världens ledande aktörer inom intelligent energioptimering.” Source: RevenueBase Database · checked Sep 17, 2026
3	Checkwatt	Partial evidence	Danderyd, SwedenHQ checked Sep 17, 2026	51-200	49 contacts →
	Partial evidence “Vision Making the 100% renewable energy system possible by applying intelligence to data and control to sources and loads.” Source: RevenueBase Database · checked Sep 17, 2026
4	FERLA	Partial evidence	Nacka, SwedenHQ checked Sep 17, 2026	11-50	35 contacts →
	Partial evidence “Vision We want to be the pioneer in the transformation towards 100% sustainable energy solutions for the property sector.” Source: RevenueBase Database · checked Sep 17, 2026
5	Luma Energy	Indirect evidence	Uppsala, SwedenHQ checked Sep 17, 2026	51-200	34 contacts →
	Indirect evidence “Vi hjälper fastighetsägare och deras hyresgäster att minska kostnader, öka intäkter och sina möjligheter till grön certifiering genom förnybar el.” Source: RevenueBase Database · checked Sep 17, 2026
6	ENGI	Partial evidence	Solna, SwedenHQ checked Sep 17, 2026	11-50	29 contacts →
	Partial evidence “Konsultbolag med branschens bästa kompetens och största passion för energieffektivisering.” Source: RevenueBase Database · checked Sep 17, 2026
7	Solar Energy Group	Partial evidence	Gävle, SwedenHQ checked Sep 17, 2026	11-50	28 contacts →
	Partial evidence “Vi på Solar Energy Group gör det enkelt att investera i en mer hållbar framtid.” Source: RevenueBase Database · checked Sep 17, 2026
8	NYA Energihem Norden AB	Partial evidence	Gävle, SwedenHQ checked Sep 17, 2026	51-200	28 contacts →
	Partial evidence “Vi på Nya Energihem Norden AB dedikerar oss till att vara en av Sveriges ledande helhetsleverantörer inom solel och fönster genom att bygga upp en omfattande kompetens inom…” Source: RevenueBase Database · checked Sep 17, 2026
9	Eniva Isolerproffs	Partial evidence	Täby, SwedenHQ checked Sep 17, 2026	51-200	26 contacts →
	Partial evidence “ENIVA Isolerproffs erbjuder energieffektiva lösningar för företag, organisationer och privatpersoner.” Source: RevenueBase Database · checked Sep 17, 2026
10	Grundels Fönstersystem AB	Partial evidence	Karlstad, SwedenHQ checked Sep 17, 2026	11-50	20 contacts →
	Partial evidence “Vi erbjuder ägare och förvaltare av fastigheter en prisvärd helhetslösning när det gäller energi- och bullerisolering av befintliga fönster, för att snabbt och effektivt minska…” Source: RevenueBase Database · checked Sep 17, 2026
11	Nrlyze AB	Indirect evidence	Stockholm, SwedenHQ checked Sep 17, 2026	1-10	16 contacts →
	Indirect evidence “Nrlyze är ett team av nyfikna entreprenörer, fastighetsägare, drifttekniker och ingenjörer som byggt det vi själva saknat under decennier.” Source: RevenueBase Database · checked Sep 17, 2026
12	Solnord	Partial evidence	Stockholm, SwedenHQ checked Sep 17, 2026	11-50	16 contacts →
	Partial evidence “Solnord ger dig kontrollen över din elräkning och klimatpåverkan med solceller och energilagring.” Source: RevenueBase Database · checked Sep 17, 2026
13	Solverket Alfa Kungsbacka	Indirect evidence	Kungsbacka, SwedenHQ checked Sep 17, 2026	1-10	15 contacts →
	Indirect evidence “Köp din solcellsanläggning av oss enkelt och tryggt från start till mål Vi hjälper dig till en lönsam investering, bra för både miljö och din plånbok.” Source: RevenueBase Database · checked Sep 17, 2026
14	1komma5 SYD FD Solensenergi	Indirect evidence	Vellinge, SwedenHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence “Sedan 2012, arbetar vi på 1KOMMA5° Syd, fd SolensEnergi, med kunden i fokus för att möjliggöra ett CO2-neutralt liv för dig genom att erbjuda framtidssäkrade solcellsanläggningar…” Source: RevenueBase Database · checked Sep 17, 2026
15	Assemblin Solar	Indirect evidence	Göteborg, SwedenHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence “På Assemblin Solar installerar vi inte bara solpaneler.” Source: RevenueBase Database · checked Sep 17, 2026
16	Nordic Energy Partner AB	Partial evidence	Örebro, SwedenHQ checked Sep 17, 2026	11-50	13 contacts →
	Partial evidence “Nordic Energy Partner är ett installationsföretag med kompetens inom el, VVS, kyla, värmepumpar, solenergi, energilager och laddinfrastruktur.” Source: RevenueBase Database · checked Sep 17, 2026
17	Algeno	Partial evidence	Göteborg, SwedenHQ checked Sep 17, 2026	1-10	13 contacts →
	Partial evidence “Algeno sänker fastighetsägares energikostnader och minskar fastigheternas klimatpåverkan.” Source: RevenueBase Database · checked Sep 17, 2026
18	Arka Energy AB	Partial evidence	Stockholm, SwedenHQ checked Sep 17, 2026	11-50	13 contacts →
	Partial evidence “Arka Energy tillhandahåller grön energiteknik till bostäder, kommersiell och statlig verksamhet.” Source: RevenueBase Database · checked Sep 17, 2026
19	Qsec Energioptimering	Partial evidence	Göteborg, SwedenHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “Vi erbjuder modern energioptimering för hållbara fastigheter.” Source: RevenueBase Database · checked Sep 17, 2026
20	Solinnovation I Värnamo AB	Indirect evidence	Bredaryd, SwedenHQ checked Sep 17, 2026	51-200	11 contacts →
	Indirect evidence “På Solinnovation tror vi på ett bättre sätt att generera el till privatpersoner, lantbrukare och företag, till en lägre kostnad samtidigt som det bidrar till en bättre miljö.” Source: RevenueBase Database · checked Sep 17, 2026
21	Energispar	Partial evidence	Arlandastad, SwedenHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Vi är experter på energieffektivisering, driftoptimering och hjälper bostadsrättsföreningar och fastighetsbolag att sänka sina energikostnader.” Source: RevenueBase Database · checked Sep 17, 2026
22	Egna Elkraft AB	Indirect evidence	Berga / Helsingborg, SwedenHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Hos oss på Egna Elkraft är ”enkelhet” vårt ledord.” Source: RevenueBase Database · checked Sep 17, 2026
23	Isoleringslandslaget AB	Indirect evidence	Upplands Vasby Stockholm, SwedenHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “Isoleringslandslaget startades med visionen att hjälpa våra kunder att spara pengar genom att sänka sina uppvärmningskostnader.” Source: RevenueBase Database · checked Sep 17, 2026
24	Invent	Partial evidence	Falun, SwedenHQ checked Sep 17, 2026	11-50	10 contacts →
	Partial evidence “Vår affärsidé är att förse fastigheter med kostnadseffektiva, väl fungerande, moderna och energioptimerade installationer för inomhusklimat.” Source: RevenueBase Database · checked Sep 17, 2026
25	Brainy Energy Group Nordic AB	Partial evidence	Stockholm \| Göteborg \| Norrköping \| Växjö \| Kalmar, SwedenHQ checked Sep 17, 2026	11-50	9 contacts →
	Partial evidence “Experter inom energi Vi är experter inom energiprojekt och vet att varje byggnad och verksamhet har sina egna förutsättningar.” 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 25 of 109 residential energy efficiency companies based in Sweden

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Residential energy efficiency companies based in Sweden at a glance

As of Sep 17, 2026

46.1%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

28.4%Largest-city concentration · Stockholm

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Sweden, so it is reported there. Company counts and contact totals on this page are exact for Sweden, over 109 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 Sweden 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 Sweden 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, 417 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.

Residential energy efficiency companies by metro

Residential energy efficiency companies in Stockholm31

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 Sweden?

RevenueBase identified 109 residential energy efficiency companies headquartered in Sweden 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?

Indoor Energy, headquartered in Stockholm Solna, tops this list with the largest team on record.

Which city has the most residential energy efficiency companies?

Stockholm leads with 31 headquartered companies, followed by Goteborg (4) and Malmo (4).

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 417 verified decision-maker contacts tracked across these 109 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.