Company lists · Data refreshed September 2026

Top 25 Sustainable software companies based in the United States

Name: Sustainable software companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 435 companies tracked

RevenueBase identified 435 sustainable software companies headquartered in the United States as of September 2026 and tracks 21,748 professional contacts across them, including 8,383 with verified work emails. Houston is the largest hub.

This list covers sustainable software companies headquartered in the 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 29, 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 29, 2026 86% judged on-target in blind review

435Companies

21,748Contacts tracked

8,383Verified emails

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The 25 largest sustainable software companies based in the United States

Ranked by team size

Top 25 of 435 sustainable software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable software 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Carrier	Partial evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 29, 2026	10001+	7,665 contacts →
	Partial evidence “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Source: RevenueBase Database · checked Sep 29, 2026
2	Mckinstry	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 29, 2026
3	GE Digital	Partial evidence	San Ramon, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,763 contacts →
	Partial evidence “At GE Digital, our focus is clear: delivering software that accelerates a new era of energy.” Source: RevenueBase Database · checked Sep 29, 2026
4	Adec Innovations	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,304 contacts →
	Partial evidence “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Source: RevenueBase Database · checked Sep 29, 2026
5	Franklin Energy	Partial evidence	Port Washington, WI, United StatesHQ checked Sep 29, 2026	1,001-5,000	838 contacts →
	Partial evidence “Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…” Source: RevenueBase Database · checked Sep 29, 2026
6	Schneider Electric Sustainability Business	Partial evidence	Louisville, KY, United StatesHQ checked Sep 29, 2026	1,001-5,000	571 contacts →
	Partial evidence “We are your digital partner for sustainability and efficiency, ensuring Life Is On, for homes, buildings, data centers, infrastructure and industries.” Source: RevenueBase Database · checked Sep 29, 2026
7	Watershed	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	201-500	529 contacts →
	Partial evidence “Watershed is the enterprise sustainability platform.” Source: RevenueBase Database · checked Sep 29, 2026
8	Dupont Water Solutions	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 29, 2026	10001+	470 contacts →
	Indirect evidence “We’re helping companies in every industry, in every corner of the globe make real progress.” Source: RevenueBase Database · checked Sep 29, 2026
9	PCI Energy Solutions	Indirect evidence	Norman, OK, United StatesHQ checked Sep 29, 2026	201-500	346 contacts →
	Indirect evidence “PCIEnergySolutions is a tight-knit team of 300 diligent product experts, engineers, business analysts, and more.” Source: RevenueBase Database · checked Sep 29, 2026
10	3degrees Group, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	201-500	324 contacts →
	Indirect evidence “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Source: RevenueBase Database · checked Sep 29, 2026
11	Greenly	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	305 contacts →
	Partial evidence “Greenly is on a mission to democratize access to science-backed climate intelligence, transforming sustainability from a compliance burden into a strategic competitive advantage.” Source: RevenueBase Database · checked Sep 29, 2026
12	Cascade Energy	Indirect evidence	Portland, OR, United StatesHQ checked Sep 29, 2026	201-500	288 contacts →
	Indirect evidence “At Cascade Energy, we believe in better.” Source: RevenueBase Database · checked Sep 29, 2026
13	Metiri Group	Indirect evidence	Clovis, CA, United StatesHQ checked Sep 29, 2026	n/a	233 contacts →
	Indirect evidence “Appl Inc is an environmental services company based out of 908 N Temperance Ave, Clovis, CA, United States.” Source: RevenueBase Database · checked Sep 29, 2026
14	Opus Inspection Technologies	Indirect evidence	Brookfield, WI, United StatesHQ checked Sep 29, 2026	201-500	231 contacts →
	Indirect evidence “Opus Inspection Technologies is a leader in developing, implementing and managing innovative technology and system solutions that enable customers worldwide to address their…” Source: RevenueBase Database · checked Sep 29, 2026
15	ANB Systems, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	51-200	223 contacts →
	Partial evidence “ANB Systems is a leading software provider for the energy industry.” Source: RevenueBase Database · checked Sep 29, 2026
16	Nuverra Environmental Solutions	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 29, 2026	501-1,000	201 contacts →
	Indirect evidence “Nuverra Environmental Solutions is a company dedicated to the protection, enhancement and advancement of environmental solutions.” Source: RevenueBase Database · checked Sep 29, 2026
17	Plateau GRP	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 29, 2026	51-200	192 contacts →
	Indirect evidence “Plateau Grp provides innovative and agile IT solutions to customer challenges.” Source: RevenueBase Database · checked Sep 29, 2026
18	Energy Network	Partial evidence	Elkhorn, NE, United StatesHQ checked Sep 29, 2026	201-500	151 contacts →
	Partial evidence “Energy Network has four areas of expertise, each of which is focused on reducing operational expenses and at the same time augment our clients’ sustainability objectives.” Source: RevenueBase Database · checked Sep 29, 2026
19	Worthen Industries	Partial evidence	Nashua, NH, United StatesHQ checked Sep 29, 2026	201-500	148 contacts →
	Partial evidence “At Worthen Industries we specialize in sustainable solutions by applying technology and a customer-first approach to every challenge.” Source: RevenueBase Database · checked Sep 29, 2026
20	Touchstone IQ	Partial evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	51-200	139 contacts →
	Partial evidence “Touchstone IQ is a leading-edge building energy management software & services company.” Source: RevenueBase Database · checked Sep 29, 2026
21	Persefoni	Indirect evidence	Mesa, AZ, United StatesHQ checked Sep 29, 2026	201-500	137 contacts →
	Indirect evidence “Persefoni AI Inc.” Source: RevenueBase Database · checked Sep 29, 2026
22	Synergy Companies	Indirect evidence	Fresno, CA, United StatesHQ checked Sep 29, 2026	501-1,000	124 contacts →
	Indirect evidence “Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Source: RevenueBase Database · checked Sep 29, 2026
23	Envocore	Partial evidence	Gambrills, MD, United StatesHQ checked Sep 29, 2026	201-500	116 contacts →
	Partial evidence “We make sustainable happen.” Source: RevenueBase Database · checked Sep 29, 2026
24	Cascadia Consulting Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	51-200	110 contacts →
	Partial evidence “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Source: RevenueBase Database · checked Sep 29, 2026
25	Pulsora	Partial evidence	San Mateo, CA, United StatesHQ checked Sep 29, 2026	51-200	98 contacts →
	Partial evidence “Pulsora is a sustainability management platform that helps businesses simplify and consolidate complex ESG operations, processes, and data in one centralized hub.” Source: RevenueBase Database · checked Sep 29, 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 software companies. 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 software companies.
Partial evidence: Its own public description names part of sustainable software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable software companies. 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 435 sustainable software companies based in the United States

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Sustainable software companies based in the United States at a glance

As of Sep 29, 2026

38.5%Verified-email coverage

50.0Average contacts per company

1-10Median size (employees)

4.8%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

242

11-50

123

51-200

201-500

501-1,000

1,001-5,000

10001+

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 435 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 software 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 the United States whose own description of what they do matches “sustainable software 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 sustainable software 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 sustainable software companies, and records with no verified work email. Companies headquartered outside United States 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, 8,383 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 29, 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 sustainable software 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 sustainable software companies are there based in the United States?

RevenueBase identified 435 sustainable software companies headquartered in the 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?

Carrier, headquartered in Palm Beach Gardens, tops this list with the largest team on record.

Which city has the most sustainable software companies?

Houston leads with 21 headquartered companies, followed by San Francisco (19) and New York (19).

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 8,383 verified decision-maker contacts tracked across these 435 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 29, 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.