Company lists · Data refreshed November 2026

Top 19 Cleantech startups based in Finland

RevenueBase identified 32 company matches for cleantech startups associated with Finland as of November 2026 and tracks 1,612 professional contacts across them, including 870 with verified work emails. Helsinki is the largest hub.

This list covers company matches for cleantech startups associated with Finland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
32Companies
1,612Contacts tracked
870Verified emails
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The 19 largest cleantech startups based in Finland

Ranked by team size
Top 19 of 32 company matches for cleantech startups based in Finland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHelsinki, FinlandHQ recorded Nov 6, 202610001+991 contacts →

Exact match

“Wärtsilä leads the transition towards a 100% renewable energy future.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchEspoo, FinlandHQ recorded Nov 6, 20261,001-5,000447 contacts →

Exact match

“Sumitomo SHI FW (SFW) is a global provider of solutions and services that drive the decarbonization of energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchKankaanpää, FinlandHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“Vatajankoski on uuden energian yhtiö, joka säästää energiaa – ja lopun se tuottaa kotimaisilla ja uusiutuvilla polttoaineilla.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHelsinki, FinlandHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“At Solved, we believe that everyone can go smart, clean and sustainable with the right kind of help and connections.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchHelsinki, FinlandHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“GreenStream Network Ltd is an investor, investment management and advisory company in the fields of renewable energy, energy efficiency and climate finance, with active operations…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchHelsinki, FinlandHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“Geyser Batteries is a Finnish cleantech startup developing and producing a new generation of safe and sustainable power batteries using proprietary water-based electrochemistry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMikkeli, FinlandHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Valoe is a technology provider with a mission of clean solar energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchTupos, FinlandHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Green dreams to productive reality We help cleantech companies in commercializing products.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchHelsinki, FinlandHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Forus is a novel finance and sales company that develops services to stop climate-change profitably.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHelsinki, FinlandHQ recorded Nov 6, 20261-108 contacts →

Exact match

“Will & Must is a Helsinki-based developer of energy and infrastructure projects, founded in 2022.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchHelsinki, FinlandHQ recorded Nov 6, 20261-108 contacts →

Exact match

“GEBO Finland founded in 1969 is a part of GEBO Cleantech Group.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchVantaa, FinlandHQ recorded Nov 6, 20261-107 contacts →

Exact match

“We are a Finnish clean technology company, actively engaged in both marine and land-based industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchTampere, FinlandHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Ozonium is a cleantech startup based in Tampere specialized in the distribution and installation of Ozone equipment for water and air treatments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHelsinki, FinlandHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Green Net Finland is a cleantech cluster developing smart and low-carbon urban environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKalajoki, FinlandHQ recorded Nov 6, 202651-2003 contacts →

Exact match

“Welcome to Andament, where innovation meets sustainability.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchTampere, FinlandHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Finrenes Oy is a small start-up company working on the field of renewable energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHelsinki, FinlandHQ recorded Nov 6, 20261-101 contacts →

Exact match

“GreenPay creates digital solutions and designs eco-friendly products to promote sustainable business growth.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchHelsinki, FinlandHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Action Energy Finance finances, owns and operates cleaner infrastructure of tomorrow.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchJyvaskyla, FinlandHQ recorded Nov 6, 20261-101 contacts →

Exact match

“CO2Esto Ltd is an expert company which is serving companies, communities and individuals to seek cost-efficient solutions to combat climate and energy challenges.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 19 of 32 cleantech startups based in Finland

See the full list, filter by size, metro and specialty, and access 870 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cleantech startups based in Finland at a glance

As of Nov 6, 2026
54.0%Verified-email coverage
50.4Average contacts per company
1-10Median size (employees)
46.9%Largest-city concentration · Helsinki
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
6
51-200
2
1,001-5,000
1
10001+
1

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 32 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Finland whose business descriptions match “cleantech startups” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 870 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cleantech startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cleantech startups are there based in Finland?

RevenueBase identified 32 company matches for cleantech startups associated with Finland as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Wärtsilä Energy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most cleantech startups?

Helsinki leads with 15 company records, followed by Vantaa (4) and Espoo (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 870 professional contacts with verified work emails tracked across these 32 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.