Company lists · Data refreshed September 2026

Top 8 Energy transition companies based in Ukraine

RevenueBase identified 49 energy transition companies headquartered in Ukraine as of September 2026 and tracks 635 professional contacts across them, including 62 with verified work emails. Kyiv is the largest hub.

This list covers energy transition companies headquartered in Ukraine, 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
49Companies
635Contacts tracked
62Verified emails
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The 8 largest energy transition companies based in Ukraine

Ranked by team size
Top 8 of 49 energy transition companies based in Ukraine, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to energy transition 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceVinnytsia, UkraineHQ checked Sep 15, 20261,001-5,000132 contacts →

Partial evidence

“KNESS is an international group of companies operating in the renewable energy sector.”

Source: RevenueBase Database · checked Sep 15, 2026
2Partial evidenceKyiv, UkraineHQ checked Sep 15, 202651-20092 contacts →

Partial evidence

“Atmosfera is a distributor of renewable energy equipment, technologies and solutions.”

Source: RevenueBase Database · checked Sep 15, 2026
3Partial evidenceVinnytsia, UkraineHQ checked Sep 15, 202651-20050 contacts →

Partial evidence

“Voltage Group: Premier EPC Contractor for Renewable Energy and Industrial Power Projects Voltage Group is a leading developer and EPC contractor specializing in renewable energy…”

Source: RevenueBase Database · checked Sep 15, 2026
4Partial evidenceKyiv, UkraineHQ checked Sep 15, 202651-20041 contacts →

Partial evidence

“Elementum is the largest foreign investor into Ukraine`s renewable energy, with the fleet of 29 plants producing power from solar and wind.”

Source: RevenueBase Database · checked Sep 15, 2026
5Partial evidenceKyiv, UkraineHQ checked Sep 15, 202651-20032 contacts →

Partial evidence

“SUNSAY NRG, a team of experts in solar energy and battery energy storage systems (BESS) for businesses.”

Source: RevenueBase Database · checked Sep 15, 2026
6Indirect evidenceKhmelnytskyi, UkraineHQ checked Sep 15, 202651-20024 contacts →

Indirect evidence

“Сонячні електростанції для дому та бізнесу”

Source: RevenueBase Database · checked Sep 15, 2026
7Partial evidencePutrivka Village, UkraineHQ checked Sep 15, 20261-108 contacts →

Partial evidence

“Avenston is an Operating Partner for international renewable energy companies entering or expanding in Ukraine.”

Source: RevenueBase Database · checked Sep 15, 2026
8Partial evidenceLviv, UkraineHQ checked Sep 15, 202611-501 contacts →

Partial evidence

“UKRENEVO is a subsidiary of Renevo Energy - a trusted name in the renewable energy market.”

Source: RevenueBase Database · checked Sep 15, 2026

Showing 8 of 49 energy transition companies based in Ukraine

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Energy transition companies based in Ukraine at a glance

As of Sep 15, 2026
9.8%Verified-email coverage
13.0Average contacts per company
11-50Median size (employees)
18.4%Largest-city concentration · Kyiv
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
10
11-50
21
51-200
12
201-500
4
1,001-5,000
2

Email recency for this list is measured worldwide rather than for Ukraine, so it is reported there. Company counts and contact totals on this page are exact for Ukraine, over 49 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 transition 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 Ukraine whose own description of what they do matches “energy transition 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 energy transition 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 energy transition companies, and records with no verified work email. Companies headquartered outside Ukraine 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, 62 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.

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 transition 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 energy transition companies are there based in Ukraine?

RevenueBase identified 49 energy transition companies headquartered in Ukraine 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?

KNESS, headquartered in Vinnytsia, tops this list with the largest team on record.

Which city has the most energy transition companies?

Kyiv leads with 9 headquartered companies, followed by Kiev (6) and Kyiv Kyiv (6).

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 62 verified decision-maker contacts tracked across these 49 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.