Company lists · Data refreshed November 2026

Top 25 Professional membership organizations worldwide

RevenueBase identified 724 company matches for professional membership organizations worldwide as of November 2026 and tracks 8,642 professional contacts across them, including 1,539 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for professional membership organizations worldwide, 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 November 6, 2026. Country and city lists for professional membership organizations follow the table.

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 Nov 6, 2026 How this list was built
724Companies
8,642Contacts tracked
1,539Verified emails
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The 25 largest professional membership organizations worldwide

Ranked by team size
Top 25 of 724 company matches for professional membership organizations worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchBarcelona, SpainHQ recorded Nov 6, 202651-200565 contacts →

Exact match

“El Ilustre Colegio de Abogados de Barcelona (ICAB) es una institución que trabaja para defender la profesión de abogado y la promoción de la imagen de la abogacía dentro de la…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchNew York, NY, United StatesHQ recorded Nov 6, 2026n/a491 contacts →

Exact match

“PRSA is where communicators stay ahead of what's actually landing on our desks: AI, crisis, misinformation, and reputation management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchSydney, AustraliaHQ recorded Nov 6, 202651-200322 contacts →

Exact match

“The Law Society of NSW is the proud voice of the legal profession, representing the interests of over members.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMontréal, QC, CanadaHQ recorded Nov 6, 202651-200275 contacts →

Exact match

“Afin d'assurer la protection du public, le Barreau du Québec maximise les liens de confiance entre les avocats et les avocates, le public et l'État.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 2026n/a261 contacts →

Exact match

“Our mission is to strengthen architectural firms that add value to client and society on promising markets.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSan Jose, Costa RicaHQ recorded Nov 6, 2026201-500257 contacts →

Exact match

“La misión del CFIA es asegurar la excelencia del ejercicio profesional de la ingeniería y la arquitectura y brindar a sus miembros la posibilidad de un desarrollo integral, con…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchWashington, DC, United StatesHQ recorded Nov 6, 202651-200156 contacts →

Exact match

“ASAE is the essential organization for association management, representing both organizations and individual association professionals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchItalyHQ recorded Nov 6, 202651-200150 contacts →

Exact match

“LS Lexjus Sinacta è un'associazione professionale nazionale che fonde le peculiarità e specializzazioni di professionisti che operano nel proprio territorio da oltre 40 anni.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchAldgate, United KingdomHQ recorded Nov 6, 202651-200143 contacts →

Exact match

“Pathology is the science at the heart of modern medicine, vital for the diagnosis and clinical management of disease.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBraddon, AustraliaHQ recorded Nov 6, 202611-50141 contacts →

Exact match

“The Law Council of Australia represents more than Australian legal professionals through its constituent member bar associations, law societies and Law Firms Australia, on…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchWestmount, QC, CanadaHQ recorded Nov 6, 202651-200139 contacts →

Exact match

“Founded in 1960, the Canadian Pension & Benefits Institute is a national, not-for-profit organization that specializes in providing its members with low-cost, industry-related…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAlexandria, VA, United StatesHQ recorded Nov 6, 202611-50131 contacts →

Exact match

“Founded in 1927, the Club Management Association of America (CMAA) is the largest professional association for managers of membership clubs with 8,700 members throughout the US…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchMelbourne, AustraliaHQ recorded Nov 6, 202651-200117 contacts →

Exact match

“Membership of MIPS is available to health practitioners and students.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBrazilHQ recorded Nov 6, 2026501-1,000115 contacts →

Exact match

“Criado em o Crea-Minas Júnior é o pioneiro de um movimento que se difundiu pelo país.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKuala Lumpur, MalaysiaHQ recorded Nov 6, 202651-200111 contacts →

Exact match

“Asian Institute of Insurance (Aii) is the foremost professional organisation for insurance professionals in Malaysia, dedicated to upholding the highest standards of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchGaithersburg, MD, United StatesHQ recorded Nov 6, 202651-20099 contacts →

Exact match

“For more than half a century, NEA Member Benefits has helped enhance the lives of NEA members and their families through advocacy, service and information.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchOakland, CA, United StatesHQ recorded Nov 6, 202611-5080 contacts →

Exact match

“Providing a Foundation for Success - Create a solid, profitable & rewarding business by building your company on a foundation of proven success principles, unparalleled support &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchMontes De Oca, Costa RicaHQ recorded Nov 6, 2026201-50069 contacts →

Exact match

“El Colegio de Ciencias Económicas es un ente público no estatal que procura el bienestar de sus miembros, a través del desarrollo y actualización profesional y la fiscalización de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5066 contacts →

Exact match

“The Personal Finance Society (PFS) is the pre-eminent professional membership body for financial planners and those in related roles.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchToronto, ON, CanadaHQ recorded Nov 6, 202611-5054 contacts →

Exact match

“Founded in 1889, the Ontario Association of Architects is a self-regulating organization governed by the Architects Act, which is a statute of the Government of Ontario.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Nov 6, 2026n/a51 contacts →

Exact match

“Managing Partners' Forum is a membership organisation dedicated to helping professional firms grow by providing insights to improve performance, increase profitability and prepare…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchAlicante, SpainHQ recorded Nov 6, 202611-5047 contacts →

Exact match

“El Colegio de la Abogacía de Alicante es una institución que tiene por objeto la ordenación del ejercicio de la profesión, su representación ante la sociedad y los poderes…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBucharest, RomaniaHQ recorded Nov 6, 202611-5042 contacts →

Exact match

“UNBR este persoană juridică de interes public și unica organizație profesională care, împreună cu barourile membre, asigură exercitarea calificată a dreptului la apărare…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 202611-5041 contacts →

Exact match

“PLUS is recognized as the primary source of professional liability educational programs and seminars, networking events, educational products, and information regarding…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchParis, FranceHQ recorded Nov 6, 20261,001-5,00041 contacts →

Exact match

“Building Together Professional quality being the meeting of competence and loyalty, COBATY integrates those who practice their profession with passion with regard to these…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 724 professional membership organizations worldwide

See the full list, filter by size, metro and specialty, and access 1,539 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Professional membership organizations worldwide at a glance

As of Nov 6, 2026
17.8%Verified-email coverage
11.9Average contacts per company
1-10Median size (employees)
2.1%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
365
11-50
167
51-200
91
201-500
40
501-1,000
23
1,001-5,000
23
5,001-10,000
5
10001+
5

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for professional membership organizations are linked below.
What qualifies
Company records worldwide whose business descriptions match “professional membership organizations” 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. 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 1,539 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 November 6, 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.

Professional membership organizations by location

2 lists · largest first

Every Professional membership organizations list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “professional membership organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional membership organizations are there worldwide?

RevenueBase identified 724 company matches for professional membership organizations worldwide as of November 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?

IL Lustre COL Legi DE L'advocacia DE Barcelona Icab tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most professional membership organizations?

The United States leads with 191 companies, followed by the United Kingdom (48). Every professional membership organizations list by country and city is linked on this page.

Which city has the most professional membership organizations?

London leads with 15 company records, followed by New York (11) and Paris (11).

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 1,539 professional contacts with verified work emails tracked across these 724 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 November 6, 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.