Company lists · Data refreshed September 2026

Top 25 Energy startups based in Sweden

RevenueBase identified 142 energy startups headquartered in Sweden as of September 2026 and tracks 2,464 professional contacts across them, including 1,276 with verified work emails. Stockholm is the largest hub.

This list covers energy startups 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 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 15, 2026 86% judged on-target in blind review
142Companies
2,464Contacts tracked
1,276Verified emails
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The 25 largest energy startups based in Sweden

Ranked by team size
Top 25 of 142 energy startups based in Sweden, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to energy startups: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceStockholm, SwedenHQ checked Sep 15, 2026201-500501 contacts →

Partial evidence

“OX2 develops, constructs, manages, and owns renewable energy solutions at scale, including onshore wind, offshore wind, solar power, and energy storage.”

Source: RevenueBase Database · checked Sep 15, 2026
2Partial evidenceStockholm, SwedenHQ checked Sep 15, 2026201-500282 contacts →

Partial evidence

“Polarium is a leading energy storage developer.”

Source: RevenueBase Database · checked Sep 15, 2026
3Indirect evidenceStockholm, SwedenHQ checked Sep 15, 202651-200199 contacts →

Indirect evidence

“Flower is Flexible Power.”

Source: RevenueBase Database · checked Sep 15, 2026
4Partial evidenceStockholm, SwedenHQ checked Sep 15, 202651-200114 contacts →

Partial evidence

“At Alight, we’re on a mission to kick carbon off the grid by helping energy-intensive businesses switch to solar.”

Source: RevenueBase Database · checked Sep 15, 2026
5Partial evidenceAskim, SwedenHQ checked Sep 15, 202651-20070 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 15, 2026
6Partial evidenceKungälv, SwedenHQ checked Sep 15, 202651-20066 contacts →

Partial evidence

“SunRoof is revolutionizing home electrification and decentralized renewable energy generation with the most powerful and resource-efficient 2-in-1 solar roofs on the market.”

Source: RevenueBase Database · checked Sep 15, 2026
7Partial evidenceSundbyberg, SwedenHQ checked Sep 15, 202651-20064 contacts →

Partial evidence

“Ferroamp is a Swedish greentech company focused on energy and power optimization of properties.”

Source: RevenueBase Database · checked Sep 15, 2026
8Partial evidenceMarkaryd, SwedenHQ checked Sep 15, 2026n/a62 contacts →

Partial evidence

“Word-class solutions in sustainable energy Our passion for doing business, product development and corporate acquisitions have led to a signifcant expansion for the last 25 years.”

Source: RevenueBase Database · checked Sep 15, 2026
9Partial evidenceDanderyd, SwedenHQ checked Sep 15, 202651-20049 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 15, 2026
10Partial evidenceRabbalshede, SwedenHQ checked Sep 15, 202611-5045 contacts →

Partial evidence

“At Rabbalshede Kraft, we help shape the energy of tomorrow.”

Source: RevenueBase Database · checked Sep 15, 2026
11Partial evidenceStockholm, SwedenHQ checked Sep 15, 2026501-1,00036 contacts →

Partial evidence

“Kort om Soltech Enegry Soltech-koncernen är en helhetsleverantör av energi- och solcellslösningar.”

Source: RevenueBase Database · checked Sep 15, 2026
12Indirect evidenceJönköping, SwedenHQ checked Sep 15, 202651-20033 contacts →

Indirect evidence

“Solifokus är ett innovativt solcellsföretag som erbjuder smidiga och kostnadseffektiva helhetslösningar för privatpersoner och företag som vill investera i solceller, laddboxar…”

Source: RevenueBase Database · checked Sep 15, 2026
13Indirect evidenceStockholm, SwedenHQ checked Sep 15, 202611-5029 contacts →

Indirect evidence

“SaltX is a Swedish Greentech company that develops and markets sustainable technology that will benefit customers, the climate, and society.”

Source: RevenueBase Database · checked Sep 15, 2026
14Partial evidenceTrelleborg, SwedenHQ checked Sep 15, 202611-5029 contacts →

Partial evidence

“Trelleborgs Energi is a modern energy company with the future in mind.”

Source: RevenueBase Database · checked Sep 15, 2026
15Partial evidenceLindesberg, SwedenHQ checked Sep 15, 202611-5024 contacts →

Partial evidence

“Som energiproducent har vi ett större ansvar än att enbart leverera el och värme till bostäder, företag och samhällsfunktioner.”

Source: RevenueBase Database · checked Sep 15, 2026
16Partial evidenceSala, SwedenHQ checked Sep 15, 202651-20021 contacts →

Partial evidence

“Sala-Heby Energi är en erfaren och pålitlig leverantör av energitjänster, oavsett hur ditt behov ser ut.”

Source: RevenueBase Database · checked Sep 15, 2026
17Partial evidenceKista, SwedenHQ checked Sep 15, 20261-1019 contacts →

Partial evidence

“At BLIXT, we are redefining energy management through programmable power and software-defined energy networks.”

Source: RevenueBase Database · checked Sep 15, 2026
18Indirect evidenceStockholm, SwedenHQ checked Sep 15, 202611-5018 contacts →

Indirect evidence

“Helhetsleverantör inom greentech Fastighetsägare, företag eller kommun.”

Source: RevenueBase Database · checked Sep 15, 2026
19Partial evidenceStockholm, SwedenHQ checked Sep 15, 202611-5017 contacts →

Partial evidence

“Ett energi och teknikbolag som utvecklar framtidens lösningar inom den gröna omställningen.”

Source: RevenueBase Database · checked Sep 15, 2026
20Partial evidenceSveg, SwedenHQ checked Sep 15, 202611-5016 contacts →

Partial evidence

“Fyrfasen Energi AB är en modern energipartner med försäljningskontor i Sveg, Funäsdalen, Sundsvall och Ånge.”

Source: RevenueBase Database · checked Sep 15, 2026
21Indirect evidenceStockholm, SwedenHQ checked Sep 15, 202611-5016 contacts →

Indirect evidence

“Data centers will use 3,4% of the world's power consumption in 2030.”

Source: RevenueBase Database · checked Sep 15, 2026
22Indirect evidenceSkogås, SwedenHQ checked Sep 15, 202611-5015 contacts →

Indirect evidence

“Takkraft är en helhetsleverantör inom solceller, laddboxar, batterier och balanstjänster.”

Source: RevenueBase Database · checked Sep 15, 2026
23Indirect evidenceVellinge, SwedenHQ checked Sep 15, 202611-5014 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 15, 2026
24Partial evidenceSollentuna, SwedenHQ checked Sep 15, 202611-5014 contacts →

Partial evidence

“Take charge of your energy supply!”

Source: RevenueBase Database · checked Sep 15, 2026
25Strong evidenceSödermalm, SwedenHQ checked Sep 15, 202611-5013 contacts →

Strong evidence

“KanEL is a leading energy tech startup redefining the energy industry with its innovative platform.”

Source: RevenueBase Database · checked Sep 15, 2026

Showing 25 of 142 energy startups based in Sweden

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Energy startups based in Sweden at a glance

As of Sep 15, 2026
51.8%Verified-email coverage
17.4Average contacts per company
1-10Median size (employees)
31.0%Largest-city concentration · Stockholm
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
81
11-50
40
51-200
13
201-500
3
501-1,000
1
1,001-5,000
1
10001+
1

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 142 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 energy startups, 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 “energy startups”. 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 energy startups), 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 energy startups, 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, 1,276 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.

Energy startups by metro

  • Energy startups in Stockholm44

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 energy startups, 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 energy startups are there based in Sweden?

RevenueBase identified 142 energy startups 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?

Ox2, headquartered in Stockholm, tops this list with the largest team on record.

Which city has the most energy startups?

Stockholm leads with 44 headquartered companies, followed by Malmo (9) and Gothenburg (5).

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 1,276 verified decision-maker contacts tracked across these 142 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.