Company lists · Data refreshed September 2026

Top 25 Clean energy software startups worldwide

Name: Clean energy software startups worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 7,087 companies tracked

RevenueBase identified 7,087 clean energy software startups worldwide as of September 2026 and tracks 137,104 professional contacts across them, including 49,169 with verified work emails. The United States is the largest market and London the largest hub.

This list covers clean energy software startups worldwide, 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 27, 2026. Country and city lists for clean energy software startups follow the table.

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 27, 2026 86% judged on-target in blind review

7,087Companies

137,104Contacts tracked

49,169Verified emails

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The 25 largest clean energy software startups worldwide

Ranked by team size

Top 25 of 7,087 clean energy software startups worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy software 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Technipfmc	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 27, 2026	10001+	19,907 contacts →
	Partial evidence “TechnipFMC is a leading technology provider to the traditional and new energies industry, delivering fully integrated projects, products, and services.” Source: RevenueBase Database · checked Sep 27, 2026
2	RENEW	Strong evidence	Gurugram, IndiaHQ checked Sep 27, 2026	1,001-5,000	4,340 contacts →
	Strong evidence “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Source: RevenueBase Database · checked Sep 27, 2026
3	Fluence	Partial evidence	Arlington, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,863 contacts →
	Partial evidence “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Source: RevenueBase Database · checked Sep 27, 2026
4	GE Digital	Strong evidence	San Ramon, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,763 contacts →
	Strong evidence “At GE Digital, our focus is clear: delivering software that accelerates a new era of energy.” Source: RevenueBase Database · checked Sep 27, 2026
5	Enverus	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,694 contacts →
	Partial evidence “Enverus is a single source platform for management, development and acquisition, within the entire energy value chain.” Source: RevenueBase Database · checked Sep 27, 2026
6	Quorum Software	Strong evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,563 contacts →
	Strong evidence “Quorum Software is a leading provider of energy software worldwide powering growth and profitability for energy businesses by connecting people, workflows, and systems with…” Source: RevenueBase Database · checked Sep 27, 2026
7	Gruppo AB	Partial evidence	Orzinuovi, United KingdomHQ checked Sep 27, 2026	1,001-5,000	1,081 contacts →
	Partial evidence “Since 1981, AB has tackled the challenges posed by energy sustainability, working alongside our customers to improve their competitiveness while saving energy and reducing…” Source: RevenueBase Database · checked Sep 27, 2026
8	Clarke Energy	Partial evidence	Liverpool, United KingdomHQ checked Sep 27, 2026	1,001-5,000	1,049 contacts →
	Partial evidence “Clarke Energy, a Rehlko company, specialises in energy efficient, low carbon and flexible energy systems.” Source: RevenueBase Database · checked Sep 27, 2026
9	Wärtsilä Energy	Partial evidence	Helsinki, FinlandHQ checked Sep 27, 2026	10001+	940 contacts →
	Partial evidence “Wärtsilä leads the transition towards a 100% renewable energy future.” Source: RevenueBase Database · checked Sep 27, 2026
10	Sunnova Energy	Strong evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	501-1,000	906 contacts →
	Strong evidence “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Source: RevenueBase Database · checked Sep 27, 2026
11	Arcadia	Partial evidence	Washington, DC, United StatesHQ checked Sep 27, 2026	501-1,000	864 contacts →
	Partial evidence “Arcadia is the global utility data and energy solutions platform.” Source: RevenueBase Database · checked Sep 27, 2026
12	Energy Solutions	Partial evidence	Oakland, CA, United StatesHQ checked Sep 27, 2026	201-500	772 contacts →
	Partial evidence “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Source: RevenueBase Database · checked Sep 27, 2026
13	NWG S.P.A	Indirect evidence	Prato, ItalyHQ checked Sep 27, 2026	n/a	766 contacts →
	Indirect evidence “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Source: RevenueBase Database · checked Sep 27, 2026
14	Resource Innovations	Partial evidence	Half Moon Bay, CA, United StatesHQ checked Sep 27, 2026	501-1,000	733 contacts →
	Partial evidence “Resource Innovations (RI) is an energy transformation firm.” Source: RevenueBase Database · checked Sep 27, 2026
15	LUMIO	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 27, 2026	5,001-10,000	719 contacts →
	Indirect evidence “We’re on a mission to make power personal.” Source: RevenueBase Database · checked Sep 27, 2026
16	Energy Exemplar	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 27, 2026	501-1,000	699 contacts →
	Partial evidence “In an era where the world is rapidly advancing towards a cleaner future through decarbonization, Energy Exemplar’s mission lies in ‘Empowering Transformative Energy Decisions’🪫…” Source: RevenueBase Database · checked Sep 27, 2026
17	Esyasoft	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 27, 2026	1,001-5,000	693 contacts →
	Partial evidence “Esyasoft is redefining the way utilities and energy providers power communities.” Source: RevenueBase Database · checked Sep 27, 2026
18	KBC A Yokogawa Company	Indirect evidence	Walton-on-thames, United KingdomHQ checked Sep 27, 2026	201-500	658 contacts →
	Indirect evidence “We are passionate about driving sustainable change for our planet.” Source: RevenueBase Database · checked Sep 27, 2026
19	Depcom Power, INC	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 27, 2026	1,001-5,000	624 contacts →
	Partial evidence “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Source: RevenueBase Database · checked Sep 27, 2026
20	Fenice Energy	Strong evidence	Chennai, IndiaHQ checked Sep 27, 2026	201-500	614 contacts →
	Strong evidence “Fenice Energy provides high-quality end-to-end clean energy solutions for homes including solar, backup, and eV charging.” Source: RevenueBase Database · checked Sep 27, 2026
21	Palmetto	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 27, 2026	201-500	539 contacts →
	Strong evidence “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Source: RevenueBase Database · checked Sep 27, 2026
22	Sonnen Gmbh	Strong evidence	Wildpoldsried, GermanyHQ checked Sep 27, 2026	501-1,000	514 contacts →
	Strong evidence “Clean, affordable energy for all is one of the greatest challenges of our time.” Source: RevenueBase Database · checked Sep 27, 2026
23	Power Factors	Strong evidence	Waltham, MA, United StatesHQ checked Sep 27, 2026	501-1,000	494 contacts →
	Strong evidence “Power Factors delivers renewable energy asset management software for global portfolios.” Source: RevenueBase Database · checked Sep 27, 2026
24	Amara Nzero Brasil	Partial evidence	Salvador, BrazilHQ checked Sep 27, 2026	501-1,000	493 contacts →
	Partial evidence “Somos uma empresa com uma grande experiência integral em energia sustentável fortemente comprometida com a Transição Energética.” Source: RevenueBase Database · checked Sep 27, 2026
25	Chakr Innovation	Partial evidence	Gurugram, IndiaHQ checked Sep 27, 2026	501-1,000	476 contacts →
	Partial evidence “Chakr Innovation is a pioneering Indian cleantech startup, founded by IIT Delhi graduates, dedicated to revolutionizing air quality with cutting-edge material science technology.” Source: RevenueBase Database · checked Sep 27, 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: clean energy software startups. 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 clean energy software startups.
Partial evidence: Its own public description names part of clean energy software startups, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy software startups. 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 7,087 clean energy software startups worldwide

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Clean energy software startups worldwide at a glance

As of Sep 27, 2026

35.9%Verified-email coverage

19.3Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,463

11-50

2,581

51-200

734

201-500

165

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 clean energy software 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.
Coverage: Every country. Country and city lists for clean energy software startups are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “clean energy software 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 clean energy software 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 clean energy software startups, and records with no verified work email.
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, 49,169 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 27, 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.

Clean energy software startups by location

35 lists · largest first

Every Clean energy software startups list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 clean energy software 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 clean energy software startups are there worldwide?

RevenueBase identified 7,087 clean energy software startups worldwide 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?

Technipfmc, headquartered in Newcastle Upon Tyne, tops this list with the largest team on record.

Which country has the most clean energy software startups?

The United States leads with 1,050 companies, followed by Brazil (456) and India (452). Every clean energy software startups list by country and city is linked on this page.

Which city has the most clean energy software startups?

London leads with 103 headquartered companies, followed by Madrid (77) and Houston (68).

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 49,169 verified decision-maker contacts tracked across these 7,087 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 27, 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.