Company lists · Data refreshed September 2026

Top 25 Professional services outsourcing firms based in Belgium

RevenueBase identified 67 professional services outsourcing firms headquartered in Belgium as of September 2026 and tracks 1,056 professional contacts across them, including 388 with verified work emails. Brussels is the largest hub.

This list covers professional services outsourcing firms headquartered in Belgium, 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
67Companies
1,056Contacts tracked
388Verified emails
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The 25 largest professional services outsourcing firms based in Belgium

Ranked by team size
Top 25 of 67 professional services outsourcing firms based in Belgium, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to professional services outsourcing firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceWemmel, BelgiumHQ checked Sep 29, 2026201-500559 contacts →

Indirect evidence

“Samen ondernemen, met kennis en visie.”

Source: RevenueBase Database · checked Sep 29, 2026
2Partial evidenceAntwerp, BelgiumHQ checked Sep 29, 2026201-500159 contacts →

Partial evidence

“USG Professionals combineert de expertise en ambities van hoog opgeleide professionals met de dagelijkse uitdagingen die bedrijven trotseren op vlak van 7 vakgebieden- Engineering…”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceBrussels, BelgiumHQ checked Sep 29, 2026n/a44 contacts →

Indirect evidence

“BDO’s Global Financial Services Practice helps clients in the financial services sector succeed in a changing landscape that is marked by regulatory reform, disruptive technology…”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceAns, BelgiumHQ checked Sep 29, 202611-5042 contacts →

Indirect evidence

“Le groupe LIBRA a pour objectif de fournir un large panel de services juridico-financiers transversaux à l’attention des entreprises dans des matières, telles que…”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceNamur, BelgiumHQ checked Sep 29, 202611-5030 contacts →

Indirect evidence

“Sogenam, bien plus qu’une fiduciaire.”

Source: RevenueBase Database · checked Sep 29, 2026
6Indirect evidence1090 Brussels, BelgiumHQ checked Sep 29, 202651-20025 contacts →

Indirect evidence

“Bij Financial Talents staan persoonlijke groei en ontwikkeling centraal.”

Source: RevenueBase Database · checked Sep 29, 2026
7Partial evidenceVichte, BelgiumHQ checked Sep 29, 202611-5014 contacts →

Partial evidence

“Outsourcing van Financiële profielen - Financieel & Juridisch advies - Accountantskantoor OUTSOURCING : De juiste Financieel Expert voor uw KMO (boekhouder, controller, finance…”

Source: RevenueBase Database · checked Sep 29, 2026
8Indirect evidenceFlanders, BelgiumHQ checked Sep 29, 202611-5013 contacts →

Indirect evidence

“Wave Group is a service company that provides its expertise to start ups, SME's and large companies.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceZemst, BelgiumHQ checked Sep 29, 202651-20012 contacts →

Indirect evidence

“The House of Support bundelt de krachten van 5 bedrijven: 1.De Supporters: administratieve duizendpoten die jou ontlasten van jouw administratie zodat je je kunt concentreren op…”

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceGenk, BelgiumHQ checked Sep 29, 20261-1011 contacts →

Partial evidence

“SYNCTIV, a Belgian Professional Services firm, specializes in enhancing business and IT strategy through skilled IT Talents.”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceKortrijk, BelgiumHQ checked Sep 29, 202611-507 contacts →

Indirect evidence

“Groep NBA is een groep van dienstverlenende bedrijven.”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceTerhagen (rumst), BelgiumHQ checked Sep 29, 202651-2007 contacts →

Indirect evidence

“Experts in IT en finance.”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceMons, BelgiumHQ checked Sep 29, 20261-106 contacts →

Indirect evidence

“CBO-Services vous supporte dans la gestion administrative et informatique de votre entreprise.”

Source: RevenueBase Database · checked Sep 29, 2026
14Indirect evidenceWalcourt, BelgiumHQ checked Sep 29, 202611-506 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceLasne, BelgiumHQ checked Sep 29, 202651-2005 contacts →

Indirect evidence

“Toujours un pas en avant Avec plus de 150 collaborateurs spécialisés et expérimentés thg accompagne depuis 25 ans plus de 2.500 mandataires dans de nombreux domaines groupés…”

Source: RevenueBase Database · checked Sep 29, 2026
16Indirect evidenceLiège, BelgiumHQ checked Sep 29, 202611-505 contacts →

Indirect evidence

“Votre partenaire pour l'ensemble des services généraux de votre entreprise (IT, Comptabilité & Finance, Ressources Humaines, Achats).”

Source: RevenueBase Database · checked Sep 29, 2026
17Partial evidenceOud-turnhout, BelgiumHQ checked Sep 29, 202611-505 contacts →

Partial evidence

“Outsourcing of back-office finance and accounting enables the client to focus on their core business which increases saved time and money.”

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidenceRoosdaal, BelgiumHQ checked Sep 29, 202651-2004 contacts →

Partial evidence

“Orisma is gespecialiseerd in professionele diensten voor uw bedrijf.”

Source: RevenueBase Database · checked Sep 29, 2026
19Partial evidenceTournai (doornik), BelgiumHQ checked Sep 29, 20261-104 contacts →

Partial evidence

“CFAT - DES PROFESSIONNELS À VOTRE ÉCOUTE Faire appel à C.F.A.T, c’est la garantie d’obtenir des solutions personnalisées et adaptées à vos besoins, d’avoir à votre service des…”

Source: RevenueBase Database · checked Sep 29, 2026
20Indirect evidenceBruges, BelgiumHQ checked Sep 29, 202611-503 contacts →

Indirect evidence

“Wij hebben de ideale mix van jong talent & ervaren collega’s.”

Source: RevenueBase Database · checked Sep 29, 2026
21Indirect evidenceTervuren, BelgiumHQ checked Sep 29, 20261-103 contacts →

Indirect evidence

“Management Advisory services for C-suite and Board Members, facilitating strategic development & inspiring leadership, operational efficiency, result- and value driven excellence…”

Source: RevenueBase Database · checked Sep 29, 2026
22Indirect evidence1460, BelgiumHQ checked Sep 29, 20261-102 contacts →

Indirect evidence

“Si Finex4You a toujours voulu mettre l’humanité au cœur des chiffres et de l’expertise comptable, c’est parce qu’au-delà de votre envie de faire évoluer votre business, nous…”

Source: RevenueBase Database · checked Sep 29, 2026
23Partial evidenceDadizele, BelgiumHQ checked Sep 29, 20261-102 contacts →

Partial evidence

“Wij nemen de backoffice en administratie uit handen, zoeken de juiste mensen via slimme recruitment, en bieden outsourcing en backoffice diensten die perfect past bij jouw bedrijf.”

Source: RevenueBase Database · checked Sep 29, 2026
24Partial evidenceBelgiumHQ checked Sep 29, 20261-102 contacts →

Partial evidence

“Bimex Solutions is a Belgian company active in outsourcing and operational purchasing consulting.”

Source: RevenueBase Database · checked Sep 29, 2026
25Partial evidenceFosses-la-ville, BelgiumHQ checked Sep 29, 20261-102 contacts →

Partial evidence

“Présentation générale : Outsourcing Management ou aider les entreprises grâce à un encadrement ou un renfort temporaire dans des domaines comme le management, la comptabilité et…”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 67 professional services outsourcing firms based in Belgium

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Professional services outsourcing firms based in Belgium at a glance

As of Sep 29, 2026
36.7%Verified-email coverage
15.8Average contacts per company
1-10Median size (employees)
6.0%Largest-city concentration · Brussels
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
41
11-50
15
51-200
8
201-500
2
10001+
1

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 67 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 services outsourcing firms, 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 Belgium whose own description of what they do matches “professional services outsourcing firms”. 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 services outsourcing firms), 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 services outsourcing firms, and records with no verified work email. Companies headquartered outside Belgium 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, 388 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 professional services outsourcing firms, 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 services outsourcing firms are there based in Belgium?

RevenueBase identified 67 professional services outsourcing firms headquartered in Belgium 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?

VGD, headquartered in Wemmel, tops this list with the largest team on record.

Which city has the most professional services outsourcing firms?

Brussels leads with 4 headquartered companies, followed by Antwerpen (2) and Bruxelles (2).

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 388 verified decision-maker contacts tracked across these 67 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.