Company lists · Data refreshed September 2026
Top 25 Cleantech companies based in Sweden
RevenueBase identified 158 cleantech companies headquartered in Sweden as of September 2026 and tracks 1,676 professional contacts across them, including 846 with verified work emails. Stockholm is the largest hub.
This list covers cleantech 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 19, 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 25 largest cleantech companies based in Sweden
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 114 contacts → | ||||
Indirect 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 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 99 contacts → | ||||
Indirect evidence “Alfdex is pushing technical boundaries by developing new, ground-breaking solutions that target today’s demanding customer needs and contribute to a sustainable future.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 93 contacts → | ||||
Strong evidence “Malmberg is a global market and technology leader in the cleantech sector.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 70 contacts → | ||||
Indirect evidence “Med över 30 år i branschen är KTC idag en av världens ledande aktörer inom intelligent energioptimering.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 63 contacts → | ||||
Strong evidence “Heatex is a leading cleantech company that optimizes and develops energy-saving thermodynamic products and solutions, contributing to a sustainable future.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 62 contacts → | ||||
Indirect 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 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 52 contacts → | ||||
Strong evidence “KP Energy is one of Sweden’s leading wholesalers in CleanTech and a part of OK-Q8 AB.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 49 contacts → | ||||
Indirect 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 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 48 contacts → | ||||
Strong evidence “Comsys is a cleantech company operating in multiple sectors and segments with one sole purpose, Perfecting Power.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 45 contacts → | ||||
Indirect evidence “At Rabbalshede Kraft, we help shape the energy of tomorrow.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 41 contacts → | ||||
Indirect evidence “Sustainable energy from Heat Power.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 39 contacts → | ||||
Indirect evidence “Centriair offers technology leading solutions for abatement of industrial airborne emissions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 35 contacts → | ||||
Indirect 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 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 35 contacts → | ||||
Indirect evidence “is a GreenTech technology company that combines strong in-house sustainability expertise with advanced AI & IoT technology.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 34 contacts → | ||||
Indirect evidence “Helicon designs, builds, and integrates software and data systems that work in complex, real-world environments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 31 contacts → | ||||
Strong evidence “Hexicon is a Swedish cleantech company that develops international floating offshore wind power projects.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 29 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 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 28 contacts → | ||||
Indirect evidence “Fever makes distributed energy work.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 27 contacts → | ||||
Strong evidence “Chromafora is an innovative cleantech company offering water treatment technologies for removing contaminants while reducing waste through selectivity.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 25 contacts → | ||||
Indirect evidence “Vi är ett energikonsultföretag med huvudkontor i Sollentuna strax norr om Stockholm samt med filialkontor i Umeå.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 24 contacts → | ||||
Strong evidence “We are a Sweden-based cleantech company with a mission to provide the best and most sustainable water and microplastic solutions to the world, helping businesses stay ahead of…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 22 contacts → | ||||
Strong evidence “Wallenius Water Innovation is a Swedish cleantech company that develops sustainable and efficient solutions for the industry, with a focus on productivity, profitability and a…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 18 contacts → | ||||
Indirect evidence “Helhetsleverantör inom greentech Fastighetsägare, företag eller kommun.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 17 contacts → | ||||
Indirect evidence “Ett energi och teknikbolag som utvecklar framtidens lösningar inom den gröna omställningen.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 16 contacts → | ||||
Strong evidence “Helios Innovations is a Swedish cleantech company specializing in low temperature evaporation for sustainable treatment of industrial liquid waste.” Source: RevenueBase Database · checked Sep 19, 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: cleantech 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 cleantech companies.
- Partial evidence
- Its own public description names part of cleantech companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cleantech 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 158 cleantech companies based in Sweden
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Cleantech companies based in Sweden at a glance
As of Sep 19, 2026Companies by employee count
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 158 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 cleantech 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 “cleantech 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 cleantech 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 cleantech 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, 846 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 19, 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.
Cleantech companies by metro
- Cleantech companies in Stockholm47
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 cleantech 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 cleantech companies are there based in Sweden?
RevenueBase identified 158 cleantech 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?
Alight, headquartered in Stockholm, tops this list with the largest team on record.
Which city has the most cleantech companies?
Stockholm leads with 47 headquartered companies, followed by Gothenburg (8) and Malmo (7).
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 846 verified decision-maker contacts tracked across these 158 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 19, 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.
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