Company lists · Data refreshed September 2026

Top 25 Professional certification companies based in the United States

Name: Professional certification 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 20, 2026 273 companies tracked

RevenueBase identified 273 professional certification companies headquartered in the United States as of September 2026 and tracks 6,049 professional contacts across them, including 1,239 with verified work emails. Houston is the largest hub.

This list covers professional certification 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 20, 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 20, 2026 86% judged on-target in blind review

273Companies

6,049Contacts tracked

1,239Verified emails

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The 25 largest professional certification companies based in the United States

Ranked by team size

Top 25 of 273 professional certification companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to professional certification 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	Prometric	Indirect evidence	White Marsh, MD, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,105 contacts →
	Indirect evidence “Prometric is a global leader in credentialing and skills development.” Source: RevenueBase Database · checked Sep 20, 2026
2	Certus	Strong evidence	Orlando, FL, United StatesHQ checked Sep 20, 2026	201-500	308 contacts →
	Strong evidence “Certus is a leading professional ed-tech training and certification company that, through its suite of brands and businesses, delivers technical-skills training and compliance…” Source: RevenueBase Database · checked Sep 20, 2026
3	Giac Certifications	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 20, 2026	201-500	184 contacts →
	Partial evidence “There are a multitude of information security certifications, but only GIAC certifications validate the true hands-on skills that go beyond theory and test the pragmatics of…” Source: RevenueBase Database · checked Sep 20, 2026
4	Green Business Certification Inc. Gbci	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	156 contacts →
	Indirect evidence “The premier organization independently recognizing excellence in green business industry performance and practice globally.” Source: RevenueBase Database · checked Sep 20, 2026
5	Holmes Corporation	Strong evidence	Eagan, MN, United StatesHQ checked Sep 20, 2026	51-200	88 contacts →
	Strong evidence “Holmes Corporation (HC) develops and delivers exceptional educational products to serve individuals worldwide seeking professional credentials and certifications.” Source: RevenueBase Database · checked Sep 20, 2026
6	Intercert INC	Indirect evidence	The Woodlands, TX, United StatesHQ checked Sep 20, 2026	51-200	85 contacts →
	Indirect evidence “INTERCERT is a multinational auditing company headquartered in Texas, United States operating at 28+ countries.” Source: RevenueBase Database · checked Sep 20, 2026
7	GSDC	Strong evidence	Westborough, MA, United StatesHQ checked Sep 20, 2026	501-1,000	85 contacts →
	Strong evidence “The Global Skill Development Council (GSDC) is a professional certification body offering GSDC accredited certifications that empower individuals, institutions, and enterprises…” Source: RevenueBase Database · checked Sep 20, 2026
8	Exemplar Global, INC	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	11-50	80 contacts →
	Indirect evidence “Exemplar Global Inc.(formerly RABQSA) is a not-for-profit organization with shared headquarters in both the United States and Australia.” Source: RevenueBase Database · checked Sep 20, 2026
9	PRI Certification	Partial evidence	Warrendale, PA, United StatesHQ checked Sep 20, 2026	11-50	78 contacts →
	Partial evidence “At PRI Certification℠, we're committed to protecting what matters by delivering industry-leading certification services across Quality, Data Security, Environmental, and Health &…” Source: RevenueBase Database · checked Sep 20, 2026
10	NEW Horizons Computer Learning Centers	Indirect evidence	New Braunfels, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	56 contacts →
	Indirect evidence “For over 35 years, New Horizons has been empowering individuals and organizations worldwide through end-to-end learning solutions – from IT Training to Business Applications to…” Source: RevenueBase Database · checked Sep 20, 2026
11	Rblp Leadership Certifications	Indirect evidence	Rapid City, SD, United StatesHQ checked Sep 20, 2026	11-50	56 contacts →
	Indirect evidence “We help people do leadership better!” Source: RevenueBase Database · checked Sep 20, 2026
12	CI	Strong evidence	Little Rock, AR, United StatesHQ checked Sep 20, 2026	n/a	56 contacts →
	Strong evidence “The Certification Institute (CI) develops and administers professional certification programs including Workers' Compensation Risk Management certification for the professional…” Source: RevenueBase Database · checked Sep 20, 2026
13	Financial Planning Standards Board LTD	Strong evidence	Denver, CO, United StatesHQ checked Sep 20, 2026	11-50	54 contacts →
	Strong evidence “FPSB manages, develops and operates certification, education and related programs to benefit the global community by establishing, upholding and promoting worldwide professional…” Source: RevenueBase Database · checked Sep 20, 2026
14	Certiverse	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	49 contacts →
	Partial evidence “Certification-as-a-Service for an evolving workforce.” Source: RevenueBase Database · checked Sep 20, 2026
15	Drummond Group, LLC	Partial evidence	Durham, NC, United StatesHQ checked Sep 20, 2026	11-50	40 contacts →
	Partial evidence “Drummond is a leading and trusted compliance, conformance, and standards certification, testing, and validation services provider.” Source: RevenueBase Database · checked Sep 20, 2026
16	Intertek Acumen Security	Partial evidence	Rockville, MD, United StatesHQ checked Sep 20, 2026	51-200	40 contacts →
	Partial evidence “We established Acumen to change how product certifications are performed.” Source: RevenueBase Database · checked Sep 20, 2026
17	Trainace	Indirect evidence	Greenbelt, MD, United StatesHQ checked Sep 20, 2026	11-50	33 contacts →
	Indirect evidence “TrainACE is an established and award-winning training organization that provides excellent customer experiences, unbeatable prices, and high-quality training for those who are…” Source: RevenueBase Database · checked Sep 20, 2026
18	RAO Group	Indirect evidence	Richland, WA, United StatesHQ checked Sep 20, 2026	n/a	31 contacts →
	Indirect evidence “At Rao Group, we offer a wide range of services through our group companies: Rao Group and Rao Publishing House.” Source: RevenueBase Database · checked Sep 20, 2026
19	The Medical Institute Of Kentucky	Indirect evidence	Lexington, KY, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “Our Vision is to become the nation's career leading, most relevant medical training institution.” Source: RevenueBase Database · checked Sep 20, 2026
20	Certification Planner, LLC	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 20, 2026	51-200	27 contacts →
	Partial evidence “About us: Certification Planner (CP) is the world's leading short and long-term certification and training provider.” Source: RevenueBase Database · checked Sep 20, 2026
21	Certitrek Group	Partial evidence	Durham, NC, United StatesHQ checked Sep 20, 2026	11-50	26 contacts →
	Partial evidence “Representing high quality and industry-recognized certification companies, worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
22	Corsec Security, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “For over 25 years Corsec has assisted companies through the IT security certification process for FIPS 140-2/FIPS 140-3, Common Criteria (CC), CSfC, and the DoD’s APL.” Source: RevenueBase Database · checked Sep 20, 2026
23	GCS Certification	Partial evidence	Salt Lake City, United StatesHQ checked Sep 20, 2026	51-200	23 contacts →
	Partial evidence “A GCS Certificadora Brasil é uma empresa do Grupo GCS Certification® que atua no universo das certificações internacionais e possui autonomia para desenvolvimento e atuação em…” Source: RevenueBase Database · checked Sep 20, 2026
24	CEU Institute	Indirect evidence	Lake Mary, FL, United StatesHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “CEU Institute is a national CE/CLE/CPE services administrator.” Source: RevenueBase Database · checked Sep 20, 2026
25	Center For Credentialing & Education	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 20, 2026	51-200	21 contacts →
	Partial evidence “The Center for Credentialing & Education (CCE®) provides services to organizations, professionals and the public.” Source: RevenueBase Database · checked Sep 20, 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: professional certification 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 professional certification companies.
Partial evidence: Its own public description names part of professional certification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional certification 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 273 professional certification companies based in the United States

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Professional certification companies based in the United States at a glance

As of Sep 20, 2026

20.5%Verified-email coverage

22.2Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

115

11-50

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 273 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 professional certification 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 “professional certification 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 professional certification 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 professional certification 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, 1,239 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 20, 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 professional certification 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 professional certification companies are there based in the United States?

RevenueBase identified 273 professional certification 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?

Prometric, headquartered in White Marsh, tops this list with the largest team on record.

Which city has the most professional certification companies?

Houston leads with 9 headquartered companies, followed by New York (9) and Miami (8).

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 1,239 verified decision-maker contacts tracked across these 273 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 20, 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.