Company lists · Data refreshed September 2026

Top 25 On demand energy companies based in the United States

RevenueBase identified 268 company matches for on demand energy companies associated with the United States as of September 2026 and tracks 30,192 professional contacts across them, including 8,431 with verified work emails. Houston is the largest hub.

This list covers company matches for on demand energy companies associated with the United States, 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 September 21, 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 Sep 21, 2026 How this list was built
268Companies
30,192Contacts tracked
8,431Verified emails
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The 25 largest on demand energy companies based in the United States

Ranked by team size
Top 25 of 268 company matches for on demand energy companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 matchIrving, TX, United StatesHQ recorded Sep 21, 2026n/a4,150 contacts →

Exact match

“Ambit Energy provides electricity, natural gas and solar services in numerous markets across the United States, primarily marketed through a direct sales channel of more than…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchWaukesha, WI, United StatesHQ recorded Sep 21, 20265,001-10,0003,797 contacts →

Exact match

“Generac is the total energy solutions company powering a smarter world.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchIrving, TX, United StatesHQ recorded Sep 21, 20265,001-10,0002,466 contacts →

Exact match

“Vistra (NYSE: VST) is a leading Fortune 500 integrated retail electricity and power generation company, based in Irving, Texas, that provides essential resources to customers…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchMilwaukee, WI, United StatesHQ recorded Sep 21, 20265,001-10,0001,709 contacts →

Exact match

“Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Sep 21, 20261,001-5,0001,645 contacts →

Exact match

“Established in 1997, Just Energy has been a leading retail energy provider serving markets across the United States and Canada.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchDublin, OH, United StatesHQ recorded Sep 21, 20261,001-5,0001,388 contacts →

Exact match

“IGS Energy has been a trusted energy advisor since 1989, growing into one of the nation’s top energy retailers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Sep 21, 20261,001-5,000917 contacts →

Exact match

“Reliant has deep Texas roots.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Sep 21, 2026501-1,000906 contacts →

Exact match

“Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchDurham, NC, United StatesHQ recorded Sep 21, 2026501-1,000740 contacts →

Exact match

“PowerSecure, a Southern Company subsidiary, is a leading provider of innovative energy solutions to electric utilities and their industrial, institutional, and commercial…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchIrving, TX, United StatesHQ recorded Sep 21, 20265,001-10,000705 contacts →

Exact match

“At Dynegy, we deliver more than just power to residential, municipal, commercial, and industrial customers across several states.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchDoral, FL, United StatesHQ recorded Sep 21, 20261,001-5,000567 contacts →

Exact match

“SoEnergy is a global provider of "energy as a service", ensuring customized solutions for a diverse array of organizations and industries worldwide, such as mining, oil & gas…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchMenlo Park, CA, United StatesHQ recorded Sep 21, 2026201-500479 contacts →

Exact match

“Mainspring is a power generator manufacturer redefining how local power is delivered to capacity constrained companies and communities.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchBoulder, CO, United StatesHQ recorded Sep 21, 2026501-1,000472 contacts →

Exact match

“Uplight is a clean energy technology company that unlocks grid capacity by activating customers and their connected devices to generate, shift, and save energy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchShelton, CT, United StatesHQ recorded Sep 21, 2026201-500366 contacts →

Exact match

“Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchLoveland, CO, United StatesHQ recorded Sep 21, 20261,001-5,000329 contacts →

Exact match

“We are a leading energy services provider specializing in the engineering, manufacturing, sales, leasing, and operations of cutting-edge power technology including natural gas and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchRaleigh, NC, United StatesHQ recorded Sep 21, 202651-200218 contacts →

Exact match

“We Deliver Resilience and Reliability in Power and Infrastructure Solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Sep 21, 2026201-500214 contacts →

Exact match

“As one of the largest and fastest growing business to business suppliers of electricity, natural gas and green energy solutions in North America, large and small business owners…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchOrange County, CA, United StatesHQ recorded Sep 21, 2026201-500203 contacts →

Exact match

“Motive Energy transforms how businesses source, store, convert, move, and manage their energy through end-to-end solutions that empower customers to take control of their energy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Sep 21, 2026201-500182 contacts →

Exact match

“Champion provides award-winning electricity services to residential customers in TX and to commercial and industrial customers in deregulated markets including CT, IL, ME, MD, MA…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchArlington, VA, United StatesHQ recorded Sep 21, 2026501-1,000138 contacts →

Exact match

“NOTE: Pepco Energy Services was acquired by Exelon Corporation on March 24, 2016 and now operates under Constellation New Energy Since 1995, Pepco Energy Services has successfully…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchChandler, AZ, United StatesHQ recorded Sep 21, 2026201-500133 contacts →

Exact match

“Elevation is one of the nation’s largest providers of residential solar, storage, energy efficiency, and energy intelligence technology providers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchVienna, VA, United StatesHQ recorded Sep 21, 202651-200115 contacts →

Exact match

“Celebrating our 30th year of energy industry experience, WGL Energy is a leading retail energy provider offering electricity, natural gas (including certified natural gas), and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchThe Woodlands, TX, United StatesHQ recorded Sep 21, 202611-50102 contacts →

Exact match

“You have a choice when it comes to energy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchFort Worth, OK, United StatesHQ recorded Sep 21, 202651-200101 contacts →

Exact match

“Baseline Energy Services delivers reliable power where it matters most.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchTampa, FL, United StatesHQ recorded Sep 21, 202651-20087 contacts →

Exact match

“Calibrant is a leading provider of on-site energy solutions for large power users.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 268 on demand energy companies based in the United States

See the full list, filter by size, metro and specialty, and access 8,431 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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On demand energy companies based in the United States at a glance

As of Sep 21, 2026
27.9%Verified-email coverage
112.7Average contacts per company
11-50Median size (employees)
6.7%Largest-city concentration · Houston
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
98
11-50
82
51-200
52
201-500
13
501-1,000
8
1,001-5,000
6
5,001-10,000
6
10001+
2

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 268 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 the United States whose business descriptions match “on demand energy companies” 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 8,431 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 September 21, 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 “on demand energy companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many on demand energy companies are there based in the United States?

RevenueBase identified 268 company matches for on demand energy companies associated with the United States as of September 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?

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

Which city has the most on demand energy companies?

Houston leads with 18 company records, followed by New York (14) and Dallas (6).

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 8,431 professional contacts with verified work emails tracked across these 268 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 September 21, 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.