Company lists · Data refreshed September 2026

Top 22 Cleantech companies based in Austin, United States

RevenueBase identified 54 company matches for cleantech companies associated with Austin, United States as of September 2026 and tracks 2,916 professional contacts across them, including 1,351 with verified work emails. Across the United States, New York is the largest hub for this category (140 companies); Austin has 54.

This list covers company matches for cleantech companies associated with Austin, 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 19, 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 19, 2026 How this list was built
54Companies
2,916Contacts tracked
1,351Verified emails
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The 22 largest cleantech companies based in Austin, United States

Ranked by team size
Top 22 of 54 company matches for cleantech companies based in Austin, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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 matchAustin, TX, United StatesHQ recorded Sep 19, 20261,001-5,0002,121 contacts →

Exact match

“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202651-200117 contacts →

Exact match

“GivePower’s mission is to electrify the world with clean energy, and provide greater health, economic and educational opportunities for developing regions that need them most.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202651-20080 contacts →

Exact match

“Origis Energy is accelerating the transition to a carbon-free future by Reimagining Zero.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-5058 contacts →

Exact match

“We believe that what’s good for our planet is good for business.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-5022 contacts →

Exact match

“Dastur Energy is an Austin, Texas based energy technology company, that is leading the way in the field of clean energy, with a strong track record of pioneering innovative…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-5018 contacts →

Exact match

“MERCOM CAPITAL GROUP - Through a unique blend of research, market intelligence and effective communication services, Mercom Capital Group gives its clients the edge they need to…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-5016 contacts →

Exact match

“Longevity Partners is a multidisciplinary energy and sustainability consultancy and investment business.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-508 contacts →

Exact match

“Industrial Sun is a renewable energy and storage developer, purpose-built to serve industrial and high energy demand customers, including refineries, pumping and compression…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-508 contacts →

Exact match

“Exceed Geo Energy is a privately held clean energy company redefining what’s possible with geothermal.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202651-2007 contacts →

Exact match

“For the last 25 years, Energiekontor has stood for a sound approach to business and a wealth of experience in wind power.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-107 contacts →

Exact match

“Renewable energy company focused on development of utility-scale clean energy projects in the United States.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-106 contacts →

Exact match

“Thunder Said Energy is a research firm focused on energy technologies and energy transition.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-105 contacts →

Exact match

“Divergent Solar is a top tier brokerage that helps homeowners and businesses save thousands by switching to sustainable energy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-504 contacts →

Exact match

“In January 2018, Frontier Associates LLC became Frontier Energy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchAustin, United StatesHQ recorded Sep 19, 20261-104 contacts →

Exact match

“Developing and investing in renewable energy projects across the Americas; serving corporate and institutional clients with customized, efficient clean energy solutions”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-103 contacts →

Exact match

“Clean Power Marketing Group helps clean energy companies and climate innovators accelerate their growth through creative marketing, PR and original content strategies.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-102 contacts →

Exact match

“Outlier Energy develops firm and carbon-free power generation resources for commercial and industrial customers who insist on reliable power and zero carbon.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“Blue Paw Energy Service is a Texas based service company offering various products and services, via its subsidiary companies such as Blue Heeler Electric, to customers and…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“Seren Labs is a data platform that helps funders and industry leaders discover emerging climatetech companies.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchAustin, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“We are an energy efficiency company specializing in comprehensive solutions for solar energy, roofing, and batteries.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchAustin, TX, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“Power Forward is an engineering firm founded on the principle that those who came before us have had a powerful impact on our world today.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 22 of 54 cleantech companies based in Austin, United States

See the full list, filter by size, metro and specialty, and access 1,351 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cleantech companies based in Austin, United States at a glance

As of Sep 19, 2026
46.3%Verified-email coverage
54.0Average contacts per company
1-10Median size (employees)
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
32
11-50
17
51-200
3
201-500
1
1,001-5,000
1

Email recency for this list is measured across the whole United States list rather than for Austin, so it is reported there. Company counts and contact totals on this page are exact for Austin, over 54 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 Austin, United States whose business descriptions match “cleantech 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 1,351 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 19, 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 companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cleantech companies are there based in Austin, United States?

RevenueBase identified 54 company matches for cleantech companies associated with Austin, 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?

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

Which city in the United States has the most cleantech companies?

New York leads the United States with 140 company records, followed by Houston (117) and San Francisco (79). Austin has 54.

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 1,351 professional contacts with verified work emails tracked across these 54 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 19, 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.