Company lists · Data refreshed September 2026

Top 25 Big 5 consulting firms based in Belgium

Name: Big 5 consulting firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 671 companies tracked

RevenueBase identified 671 big 5 consulting firms headquartered in Belgium as of September 2026 and tracks 12,408 professional contacts across them, including 5,057 with verified work emails and 329 with mobile numbers. Brussels is the largest hub.

This list covers big 5 consulting 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 23, 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 23, 2026 86% judged on-target in blind review

671Companies

12,408Contacts tracked

5,057Verified emails

329Mobile numbers

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The 25 largest big 5 consulting firms based in Belgium

Ranked by team size

Top 25 of 671 big 5 consulting firms based in Belgium, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big 5 consulting 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Arthur D. Little	Indirect evidence	Brussels, BelgiumHQ checked Sep 23, 2026	1,001-5,000	2,186 contacts →
	Indirect evidence “As people, organizations and societies embrace change at pace, its leaders must anticipate, innovate and transform ever faster.” Source: RevenueBase Database · checked Sep 23, 2026
2	Delaware Belux	Indirect evidence	Kortrijk, BelgiumHQ checked Sep 23, 2026	1,001-5,000	1,713 contacts →
	Indirect evidence “WHAT do we do?” Source: RevenueBase Database · checked Sep 23, 2026
3	Kpmg Belgium	Indirect evidence	Zaventem, BelgiumHQ checked Sep 23, 2026	1,001-5,000	1,592 contacts →
	Indirect evidence “Uncovering a world of opportunity together.” Source: RevenueBase Database · checked Sep 23, 2026
4	Alten Belgium	Indirect evidence	Saint Gilles, BelgiumHQ checked Sep 23, 2026	501-1,000	627 contacts →
	Indirect evidence “ALTEN is a group of 57 professionals present all over the world and counts more than 88% of its employees being engineers.” Source: RevenueBase Database · checked Sep 23, 2026
5	Avertim	Indirect evidence	Brussels, BelgiumHQ checked Sep 23, 2026	201-500	274 contacts →
	Indirect evidence “Most organizations are facing major transformation challenges due to market, technological, social or political factors.” Source: RevenueBase Database · checked Sep 23, 2026
6	Sopra Steria BE	Partial evidence	Strombeek-bever, BelgiumHQ checked Sep 23, 2026	501-1,000	242 contacts →
	Partial evidence “Hi, we’re Tobania, your trusted partner in Business and Technology Consulting, driving the forefront of digital transformation by valorising your business, data and technology.” Source: RevenueBase Database · checked Sep 23, 2026
7	Möbius Business Redesign	Indirect evidence	Sint-martens-latem, BelgiumHQ checked Sep 23, 2026	51-200	140 contacts →
	Indirect evidence “Möbius supports organisations by designing and implementing the best business solutions at their strategic moments.” Source: RevenueBase Database · checked Sep 23, 2026
8	ASIST	Partial evidence	Schaerbeek, BelgiumHQ checked Sep 23, 2026	11-50	93 contacts →
	Partial evidence “Asist is a specialist IBM mainframe consulting practice.” Source: RevenueBase Database · checked Sep 23, 2026
9	Innocom	Indirect evidence	Beerzel, BelgiumHQ checked Sep 23, 2026	51-200	81 contacts →
	Indirect evidence “INNOCOM is a fully independent Belgian company that has been guiding organizations through large and complex strategic changes for over 25 years.” Source: RevenueBase Database · checked Sep 23, 2026
10	Trilations	Indirect evidence	Kontich, BelgiumHQ checked Sep 23, 2026	51-200	75 contacts →
	Indirect evidence “Trilations provides business insights and works with you every day to define and implement winning strategies.” Source: RevenueBase Database · checked Sep 23, 2026
11	Addestino	Partial evidence	Zele, BelgiumHQ checked Sep 23, 2026	51-200	74 contacts →
	Partial evidence “Addestino is a technology consulting company, working on the edge of business and technology, be it for strategy & innovation or digital transformation & implementation.” Source: RevenueBase Database · checked Sep 23, 2026
12	Nova Reperta	Indirect evidence	Brussels, BelgiumHQ checked Sep 23, 2026	11-50	68 contacts →
	Indirect evidence “Nova Reperta helps your company to set a clear course for success and cultivate the strategies, processes, tools and mindset you need.” Source: RevenueBase Database · checked Sep 23, 2026
13	Square Management Belgium	Indirect evidence	Schaerbeek, BelgiumHQ checked Sep 23, 2026	501-1,000	66 contacts →
	Indirect evidence “Since 2009, Square Management Belgium is a partner of choice for financial institutions, especially banks and insurance companies, in their transformation projects.” Source: RevenueBase Database · checked Sep 23, 2026
14	NGAGE	Indirect evidence	St-lambrechts-woluwe, BelgiumHQ checked Sep 23, 2026	51-200	66 contacts →
	Indirect evidence “ngage is a business advisory boutique that combines strategic thinking, multidisciplinary expertise, and genuine human connection to deliver transformations that last.” Source: RevenueBase Database · checked Sep 23, 2026
15	Phinest	Partial evidence	Watermael-boitsfort, BelgiumHQ checked Sep 23, 2026	51-200	63 contacts →
	Partial evidence “Phinest is a Belgian Management Consulting firm providing tailor-made services to transform companies.” Source: RevenueBase Database · checked Sep 23, 2026
16	Myreas	Indirect evidence	Halle, BelgiumHQ checked Sep 23, 2026	51-200	59 contacts →
	Indirect evidence “Myreas,(A Colruyt Group Company) The home for Strategy Consultants, Enterprise Architect and Transformation Managers.” Source: RevenueBase Database · checked Sep 23, 2026
17	Aion Consulting	Partial evidence	Brussels, BelgiumHQ checked Sep 23, 2026	51-200	51 contacts →
	Partial evidence “AION Consulting is a dynamic, independent strategy advisory group, operating through offices in Brussels, Paris, Luxembourg, Lyon, and Nantes.” Source: RevenueBase Database · checked Sep 23, 2026
18	Tactical Advisory Group	Indirect evidence	Leuven, BelgiumHQ checked Sep 23, 2026	51-200	50 contacts →
	Indirect evidence “Consultants in business and technology.” Source: RevenueBase Database · checked Sep 23, 2026
19	XPLUS	Indirect evidence	Mechelen, BelgiumHQ checked Sep 23, 2026	51-200	50 contacts →
	Indirect evidence “A European consultancy company with pragmatic hands-on senior change enterprise architects, change managers and program managers bridging business and ICT and bringing real value…” Source: RevenueBase Database · checked Sep 23, 2026
20	Wemanity Reply Belgium	Partial evidence	Brussels & Antwerp, BelgiumHQ checked Sep 23, 2026	51-200	47 contacts →
	Partial evidence “Wemanity Reply is a consulting and delivery firm specialized in technological, organizational, and cultural transformation.” Source: RevenueBase Database · checked Sep 23, 2026
21	BDO Global Financial Services	Indirect evidence	Brussels, BelgiumHQ checked Sep 23, 2026	n/a	44 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 23, 2026
22	Realdev	Partial evidence	Brussels, BelgiumHQ checked Sep 23, 2026	51-200	43 contacts →
	Partial evidence “RealDev is an international Technologies and Management Consulting Group.” Source: RevenueBase Database · checked Sep 23, 2026
23	Waeg, An IBM Company	Partial evidence	Brussels, BelgiumHQ checked Sep 23, 2026	51-200	39 contacts →
	Partial evidence “Waeg, an IBM Company,(pronounced /weɪɡ/), is a leading Salesforce® Platinum Consulting Partner with offices across Europe.” Source: RevenueBase Database · checked Sep 23, 2026
24	Stanwick Management Consultants	Partial evidence	Lochristi, BelgiumHQ checked Sep 23, 2026	11-50	37 contacts →
	Partial evidence “Stanwick is an independent management consulting firm that advises national and international companies in their growth and transition.” Source: RevenueBase Database · checked Sep 23, 2026
25	Progress Consulting	Partial evidence	Liège, BelgiumHQ checked Sep 23, 2026	11-50	35 contacts →
	Partial evidence “Progress Consulting has been helping organisations like yours tackle strategic challenges head-on for more than 20 years – from HR development through to comprehensive…” Source: RevenueBase Database · checked Sep 23, 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: big 5 consulting firms. 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 big 5 consulting firms.
Partial evidence: Its own public description names part of big 5 consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 5 consulting firms. 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 671 big 5 consulting firms based in Belgium

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Big 5 consulting firms based in Belgium at a glance

As of Sep 23, 2026

40.8%Verified-email coverage

2.7%Mobile-number coverage

18.5Average contacts per company

1-10Median size (employees)

8.6%Largest-city concentration · Brussels

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

521

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

3,9130–30

1,00931–60

5261–90

1490–180

69180+

Company record updated

Median 76.0d

00–30

3,79931–60

5,15361–90

2,96490–180

492180+

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 big 5 consulting 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 “big 5 consulting 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 big 5 consulting 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 big 5 consulting 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, 5,057 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 23, 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.

Big 5 consulting firms by metro

Big 5 consulting firms in Brussels58
Big 5 consulting firms in Bruxelles25

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 big 5 consulting 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 big 5 consulting firms are there based in Belgium?

RevenueBase identified 671 big 5 consulting 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?

Arthur D. Little, headquartered in Brussels, tops this list with the largest team on record.

Which city has the most big 5 consulting firms?

Brussels leads with 58 headquartered companies, followed by Bruxelles (25) and Antwerpen (15).

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 5,057 verified decision-maker contacts tracked across these 671 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 23, 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.