Company lists · Data verified August 2026

Top 25 Environmental compliance software companies based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 792 companies tracked

There are 792 environmental compliance software companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 16,584 professional contacts across them, including 7,722 with verified work emails and 6,374 with mobile numbers. Houston is the largest hub.

This list covers environmental compliance 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. Data current as of August 28, 2026.

792Companies

16,584Contacts tracked

7,722Verified emails

6,374Mobile numbers

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The 25 largest environmental compliance software companies based in the United States

Ranked by team size

Top 25 of 792 environmental compliance software companies based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Sphera	Chicago, IL	1,001-5,000	1,345	925
2	Alliance Technical Group	Pittsburgh, PA	1,001-5,000	946	549
3	Velocityehs	Tampa, FL	501-1,000	571	410
4	Watershed	San Francisco, CA	201-500	537	96
5	VLS Environmental Solutions, LLC	Houston, TX	1,001-5,000	477	303
6	Enhesa	Arlington, VA	201-500	463	370
7	Enablon	Chicago, IL	501-1,000	438	275
8	ROUX	Houston, TX	201-500	435	311
9	Aithent INC	New York, NY	201-500	414	21
10	Picarro	Santa Clara, CA	201-500	298	202
11	Opus Inspection Technologies	Brookfield, WI	201-500	264	42
12	Tanknology	Austin, TX	201-500	228	89
13	August Mack Environmental, INC	Independence, OH	51-200	210	146
14	Helix Environmental Planning, INC	Folsom, CA	201-500	197	134
15	Source Intelligence	San Francisco, CA	201-500	175	14
16	Earthsoft	Pensacola, FL	51-200	167	104
17	Ecorp Consulting, INC	Fresno, CA	51-200	165	126
18	U.S. Compliance Environmental, Health & Safety Consulting	Excelsior, MN	51-200	162	128
19	Red-On-Line	New York	201-500	153	94
20	Cleanair Engineering	Powell, TN	51-200	152	74
21	Ensolum, LLC	Dallas, TX	51-200	139	98
22	Mostardi Platt	Mendota Heights, MN	51-200	137	24
23	Redica Systems	Pleasanton, CA	51-200	125	65
24	ESC Spectrum Corporation	Pensacola, FL	51-200	112	68
25	Hart & Hickman, PC	Raleigh, NC	51-200	101	71

Showing 25 of 792 environmental compliance software companies based in the United States

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Environmental compliance software companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

HoustonLargest hub · 38 HQs

6,374Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

408

11-50

280

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Environmental compliance software companies by metro

Metro	Companies
Environmental compliance software companies in Houston	38
Environmental compliance software companies in New York	13
Environmental compliance software companies in Austin	13
Environmental compliance software companies in Phoenix	13
Environmental compliance software companies in Denver	10
Environmental compliance software companies in Chicago	10
Environmental compliance software companies in Dallas	9
Environmental compliance software companies in Seattle	9

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental compliance software companies”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental compliance software companies are there based in the United States?

There are 792 environmental compliance software companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Sphera, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most environmental compliance software companies?

Houston leads with 38 headquartered companies, followed by New York (13) and Austin (13).

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 7,722 verified decision-maker contacts tracked across these 792 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.