Company lists · Data refreshed September 2026

Top 25 Sustainable energy innovators based in Houston, United States

Name: Sustainable energy innovators based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 114 companies tracked

RevenueBase identified 114 sustainable energy innovators headquartered in Houston, United States as of September 2026 and tracks 3,572 professional contacts across them, including 933 with verified work emails. New York is the largest hub.

This list covers sustainable energy innovators headquartered in Houston, United States, 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 18, 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 18, 2026 86% judged on-target in blind review

114Companies

3,572Contacts tracked

933Verified emails

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The 25 largest sustainable energy innovators based in Houston, United States

Ranked by team size

Top 25 of 114 sustainable energy innovators based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable energy innovators: 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	Sunnova Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	501-1,000	906 contacts →
	Partial 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 18, 2026
2	EDP Renewables North America	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	1,001-5,000	425 contacts →
	Partial evidence “EDP Renewables North America LLC (EDPR NA), its affiliates, and its subsidiaries develop, construct, own, and operate wind farms, solar parks, and energy storage systems…” Source: RevenueBase Database · checked Sep 18, 2026
3	Stem, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	501-1,000	417 contacts →
	Partial evidence “At Stem, we’re reimagining technology to drive the energy transition.” Source: RevenueBase Database · checked Sep 18, 2026
4	Signal Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	1,001-5,000	409 contacts →
	Partial evidence “Signal Energy is a leading full service design/build contractor providing Engineering, Procurement, and Construction (EPC) services for renewable energy & infrastructure projects.” Source: RevenueBase Database · checked Sep 18, 2026
5	Trismart Solar	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	201-500	167 contacts →
	Partial evidence “Our mission is to help people achieve energy independence quickly, easily, and affordably using the power of the sun and teamwork.” Source: RevenueBase Database · checked Sep 18, 2026
6	Catalyze	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	156 contacts →
	Partial evidence “Founded in 2017, Catalyze is a fully integrated developer and Independent Power Producer (IPP) of distributed renewable energy assets.” Source: RevenueBase Database · checked Sep 18, 2026
7	Clean Energy Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	101 contacts →
	Partial evidence “Clean Energy Services provides reliable services for renewable assets.” Source: RevenueBase Database · checked Sep 18, 2026
8	E'kabel	Strong evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	96 contacts →
	Strong evidence “At E’kabel, we design and implement solutions that drive efficiency, sustainability, and performance across energy operations.” Source: RevenueBase Database · checked Sep 18, 2026
9	Fastrac Energy Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	45 contacts →
	Partial evidence “At FASTRAC Energy Services, we specialize in providing comprehensive solar energy solutions that help homeowners and businesses save on energy costs while contributing to a their…” Source: RevenueBase Database · checked Sep 18, 2026
10	Radial Power	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	42 contacts →
	Indirect evidence “Radial Power is a national developer, owner, and operator of distributed solar and storage projects serving commercial, industrial, and community solar customers across the United…” Source: RevenueBase Database · checked Sep 18, 2026
11	Integratesun	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	38 contacts →
	Partial evidence “We are a Texas based residential and commercial solar development company that offers solar energy systems in TX, CA,GA, OK, AZ, NV, DC, MD & PA.” Source: RevenueBase Database · checked Sep 18, 2026
12	Chariot Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	33 contacts →
	Partial evidence “Chariot Energy is a retail electricity provider and energy solutions company serving residential, commercial, and industrial customers across competitive U.S.” Source: RevenueBase Database · checked Sep 18, 2026
13	Total Energy Solutions	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	33 contacts →
	Partial evidence “Total Energy Systems (TES) is a leading provider of integrated power generation solutions with market leading equipment, engineering and support guaranteeing dependable and…” Source: RevenueBase Database · checked Sep 18, 2026
14	Bioeco Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	24 contacts →
	Partial evidence “Bioeco Energy’s alternative energy solutions capture the renewable power of the sun, fueling new possibilities for your business and home.” Source: RevenueBase Database · checked Sep 18, 2026
15	Sunshine Renewable Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	21 contacts →
	Indirect evidence “Texas' first NABCEP Accredited PV Installation Company • NABCEP Certified PV Installation Professional # PV-102117-017952 Sunshine Renewable Solutions was established to address…” Source: RevenueBase Database · checked Sep 18, 2026
16	Solstice Solar	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	20 contacts →
	Partial evidence “Solstice Solar is a Houston-based, licensed, insured, and certified Electrical Contractor specializing in residential solar and energy storage solutions.” Source: RevenueBase Database · checked Sep 18, 2026
17	Zolarzo	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	19 contacts →
	Partial evidence “We are a company specialized in the installation of solar energy systems and roof replacement.” Source: RevenueBase Database · checked Sep 18, 2026
18	OMNE	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	18 contacts →
	Partial evidence “Our focus is cost effective service solutions in the renewable energy space.” Source: RevenueBase Database · checked Sep 18, 2026
19	Wattbridge	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	1-10	14 contacts →
	Partial evidence “WattBridge Energy is a Houston, Texas-based global independent power producer.” Source: RevenueBase Database · checked Sep 18, 2026
20	Texon Solar Energy LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	14 contacts →
	Indirect evidence “Texon Solar has you covered!” Source: RevenueBase Database · checked Sep 18, 2026
21	Energy Edge Consulting	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	13 contacts →
	Partial evidence “Energy Edge offers strategic energy management and renewable energy solutions to a wide range of businesses and institutions.” Source: RevenueBase Database · checked Sep 18, 2026
22	Fenix Solutions, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	13 contacts →
	Partial evidence “At Fenix Solutions, we're more than just an energy solutions provider.” Source: RevenueBase Database · checked Sep 18, 2026
23	Connectgen LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	11 contacts →
	Partial evidence “CONNECTING POWER, PROJECTS & PEOPLE ConnectGEN is developing renewable energy and energy storage projects across North America.” Source: RevenueBase Database · checked Sep 18, 2026
24	KNS Solar	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	51-200	10 contacts →
	Partial evidence “Headquartered in Houston, TX right inside the Energy Corridor, KNS Solar, LLC, is a strategic international energy and project development corporation, with a combined experience…” Source: RevenueBase Database · checked Sep 18, 2026
25	Texas Solar Outfitters	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	10 contacts →
	Indirect evidence “TSO is the oldest solar installer in the City of Houston family operated and in the heart of town we have been servicing Houston and the greater State of Texas since 2012.” Source: RevenueBase Database · checked Sep 18, 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: sustainable energy innovators. 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 sustainable energy innovators.
Partial evidence: Its own public description names part of sustainable energy innovators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable energy innovators. 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 114 sustainable energy innovators based in Houston, United States

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Sustainable energy innovators based in Houston, United States at a glance

As of Sep 18, 2026

26.1%Verified-email coverage

31.3Average contacts per company

11-50Median size (employees)

113.2%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 114 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 sustainable energy innovators, 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 Houston, United States whose own description of what they do matches “sustainable energy innovators”. 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 sustainable energy innovators), 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 sustainable energy innovators, and records with no verified work email. Companies headquartered outside Houston 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, 933 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 18, 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.

Sustainable energy innovators by metro in the United States

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 sustainable energy innovators, 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 sustainable energy innovators are there based in Houston, United States?

RevenueBase identified 114 sustainable energy innovators headquartered in Houston, United States 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?

Sunnova Energy, headquartered in Houston, tops this list with the largest team on record.

Which city has the most sustainable energy innovators?

New York leads with 129 headquartered companies, followed by Houston (114) and Austin (83).

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 933 verified decision-maker contacts tracked across these 114 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 18, 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.