Company lists · Data refreshed September 2026

Top 25 Modular cleanroom manufacturers based in the United States

Name: Modular cleanroom manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 216 companies tracked

RevenueBase identified 216 modular cleanroom manufacturers headquartered in the United States as of September 2026 and tracks 2,915 professional contacts across them, including 997 with verified work emails. Houston is the largest hub.

This list covers modular cleanroom manufacturers 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 30, 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 30, 2026 86% judged on-target in blind review

216Companies

2,915Contacts tracked

997Verified emails

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The 25 largest modular cleanroom manufacturers based in the United States

Ranked by team size

Top 25 of 216 modular cleanroom manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to modular cleanroom manufacturers: 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	Azzur Group	Partial evidence	Burlington, MA, United StatesHQ checked Sep 30, 2026	51-200	224 contacts →
	Partial evidence “Visit chrysalisgxp.com for GMP-ready cleanrooms and services.” Source: RevenueBase Database · checked Sep 30, 2026
2	AES Cleanroom Technology	Strong evidence	Montgomeryville, PA, United StatesHQ checked Sep 30, 2026	201-500	189 contacts →
	Strong evidence “The leader in Modular Cleanroom Systems AES is the leader in design, construction, and manufacture of modular cleanroom systems and custom cleanroom equipment for life science and…” Source: RevenueBase Database · checked Sep 30, 2026
3	Terra Universal, INC	Indirect evidence	Fullerton, CA, United StatesHQ checked Sep 30, 2026	201-500	107 contacts →
	Indirect evidence “Terra Universal is the global leader of Critical Environment Solutions®.” Source: RevenueBase Database · checked Sep 30, 2026
4	Cleanspace	Partial evidence	Fort Washington, PA, United StatesHQ checked Sep 30, 2026	501-1,000	85 contacts →
	Partial evidence “CleanSpace – Concept Through Commercialization At CleanSpace, we don’t just build cleanrooms-we deliver operational readiness.” Source: RevenueBase Database · checked Sep 30, 2026
5	Advancetec, LLC	Strong evidence	Richmond, VA, United StatesHQ checked Sep 30, 2026	51-200	84 contacts →
	Strong evidence “AdvanceTEC is the leader in cleanroom design, construction, off-site prefabrication, and modularization.” Source: RevenueBase Database · checked Sep 30, 2026
6	Advanced Cleanroom Microclean ACM	Partial evidence	Santa Ana, CA, United StatesHQ checked Sep 30, 2026	501-1,000	82 contacts →
	Partial evidence “Advanced Cleanroom Microclean is an ISO 9001:2015 certified cleanroom cleaning and facility service company.” Source: RevenueBase Database · checked Sep 30, 2026
7	G-Con	Partial evidence	College Station, TX, United StatesHQ checked Sep 30, 2026	51-200	77 contacts →
	Partial evidence “G-CON Manufacturing, Inc.’s prefabricated, turnkey cleanroom systems represent a significant transition to forward thinking in pharmaceutical and biopharmaceutical processing.” Source: RevenueBase Database · checked Sep 30, 2026
8	Whitley Manufacturing	Strong evidence	South Whitley, IN, United StatesHQ checked Sep 30, 2026	51-200	72 contacts →
	Strong evidence “Whitley Manufacturing is one of the nation's leading manufacturers of custom commercial modular buildings serving an international clientele from Indiana and Washington.” Source: RevenueBase Database · checked Sep 30, 2026
9	Icom Mechanical INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 30, 2026	51-200	70 contacts →
	Indirect evidence “Founded in 1981 in San Jose, California, ICOM has provided The Silicon Valley and other important technology communities with the highest level of products and services for nearly…” Source: RevenueBase Database · checked Sep 30, 2026
10	Porta-King Building Systems	Partial evidence	Earth City, MO, United StatesHQ checked Sep 30, 2026	51-200	52 contacts →
	Partial evidence “Porta-King is the largest manufacturer of pre-engineered buildings used in the Industrial, Commercial, Security and Petroleum markets.” Source: RevenueBase Database · checked Sep 30, 2026
11	Allied Modular Building Systems	Partial evidence	Orange, CA, United StatesHQ checked Sep 30, 2026	51-200	50 contacts →
	Partial evidence “Allied Modular has been an industry leader for over 35 years in high quality modular construction.” Source: RevenueBase Database · checked Sep 30, 2026
12	American Modular Systems	Partial evidence	Manteca, CA, United StatesHQ checked Sep 30, 2026	201-500	49 contacts →
	Partial evidence “At American Modular Systems (AMS), we’re redefining what’s possible in modular design.” Source: RevenueBase Database · checked Sep 30, 2026
13	Sterile Environment Technologies Set3	Partial evidence	Orlando, FL, United StatesHQ checked Sep 30, 2026	201-500	47 contacts →
	Partial evidence “Sterile Environment Technologies is a commercial datacenter cleaning, cleanroom cleaning, maintenance, products and services company, offering Nationwide service and specializing…” Source: RevenueBase Database · checked Sep 30, 2026
14	Sunbelt Modular INC	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 30, 2026	1,001-5,000	45 contacts →
	Partial evidence “At Sunbelt, we specialize in the design, engineering, and manufacturing of custom modular buildings for a wide range of industries.” Source: RevenueBase Database · checked Sep 30, 2026
15	Modular Devices	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 30, 2026	51-200	44 contacts →
	Partial evidence “Modular Devices is the trusted solutions partner for healthcare, pharmaceutical, and life sciences teams, delivering fast, flexible, and reliable mobile and modular building…” Source: RevenueBase Database · checked Sep 30, 2026
16	SLD Technology	Indirect evidence	Portland, OR, United StatesHQ checked Sep 30, 2026	11-50	39 contacts →
	Indirect evidence “SLD Technology, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
17	Starrco Modular Wall Systems & Pre-Assembled Buildings	Partial evidence	Maryland Heights, MO, United StatesHQ checked Sep 30, 2026	11-50	37 contacts →
	Partial evidence “Eliminate the chaos of construction with a Starrco pre-engineered modular system.” Source: RevenueBase Database · checked Sep 30, 2026
18	Boxman Studios	Strong evidence	Mount Holly, NC, United StatesHQ checked Sep 30, 2026	11-50	37 contacts →
	Strong evidence “BOXMAN Studios is one of America's leading manufacturers of Permanent Modular buildings, specializing in commercial and industrial structures servicing Hospitality, Retail, Food…” Source: RevenueBase Database · checked Sep 30, 2026
19	Clean AIR Products	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 30, 2026	11-50	33 contacts →
	Strong evidence “Clean Air Products, established in 1969, designs and manufactures standard, modified-standard and custom cleanroom systems, equipment and components for a broad range of…” Source: RevenueBase Database · checked Sep 30, 2026
20	Clean Rooms West LLC	Partial evidence	Tustin, CA, United StatesHQ checked Sep 30, 2026	11-50	32 contacts →
	Partial evidence “The Leader in Innovative Cleanroom Solutions Since 1990, Clean Rooms West has designed, built and installed thousands of cleanrooms for clients in diverse industries.” Source: RevenueBase Database · checked Sep 30, 2026
21	Anderson Systems	Partial evidence	Goleta \| Oxnard, CA, United StatesHQ checked Sep 30, 2026	51-200	26 contacts →
	Partial evidence “Full service mechanical contractor with a specialty emphasis on design-build cleanrooms, engineering, and project management.” Source: RevenueBase Database · checked Sep 30, 2026
22	Amcase INC	Partial evidence	High Point, NC, United StatesHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “Durable, Modular, Flexible Casework Solutions Built for High-Performing Workspaces.” Source: RevenueBase Database · checked Sep 30, 2026
23	Dagard USA	Partial evidence	Canton, GA, United StatesHQ checked Sep 30, 2026	11-50	21 contacts →
	Partial evidence “Dagard USA, founded in 2006, is a subsidiary to Dagard France, established to provide professional local support to the US cleanroom market.” Source: RevenueBase Database · checked Sep 30, 2026
24	Portafab	Strong evidence	Chesterfield, MO, United StatesHQ checked Sep 30, 2026	11-50	20 contacts →
	Strong evidence “As a leading manufacturer of modular building systems for interior applications, PortaFab's modular wall and ceiling systems are utilized for commercial applications in a…” Source: RevenueBase Database · checked Sep 30, 2026
25	Tamer Industries	Indirect evidence	Somerset, MA, United StatesHQ checked Sep 30, 2026	11-50	18 contacts →
	Indirect evidence “Our In-Plant Environment Specialists will work with you to develop practical, cost-effective solutions that you and your employees can work with.” Source: RevenueBase Database · checked Sep 30, 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: modular cleanroom manufacturers. 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 modular cleanroom manufacturers.
Partial evidence: Its own public description names part of modular cleanroom manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name modular cleanroom manufacturers. 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 216 modular cleanroom manufacturers based in the United States

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Modular cleanroom manufacturers based in the United States at a glance

As of Sep 30, 2026

34.2%Verified-email coverage

13.5Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · Houston

Sep 30, 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 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 216 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 modular cleanroom manufacturers, 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 “modular cleanroom manufacturers”. 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 modular cleanroom manufacturers), 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 modular cleanroom manufacturers, 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, 997 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 30, 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 modular cleanroom manufacturers, 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 modular cleanroom manufacturers are there based in the United States?

RevenueBase identified 216 modular cleanroom manufacturers 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?

Azzur Group, headquartered in Burlington, tops this list with the largest team on record.

Which city has the most modular cleanroom manufacturers?

Houston leads with 5 headquartered companies, followed by Orange (5) and Grand Rapids (4).

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 997 verified decision-maker contacts tracked across these 216 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 30, 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.