Company lists · Data refreshed September 2026

Top 25 Data security consulting firms based in Belgium

RevenueBase identified 185 data security consulting firms headquartered in Belgium as of September 2026 and tracks 762 professional contacts across them, including 299 with verified work emails and 28 with mobile numbers. Brussels is the largest hub.

This list covers data security 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review
185Companies
762Contacts tracked
299Verified emails
28Mobile numbers
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The 25 largest data security consulting firms based in Belgium

Ranked by team size
Top 25 of 185 data security consulting firms based in Belgium, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to data security 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceAsse, Belgium201-50074 contacts →

Partial evidence

“Xalient ondersteunt toonaangevende organisaties bij het beschermen van hun meest waardevolle middelen: hun medewerkers, applicaties en data.”

Source: RevenueBase Database · checked Sep 1, 2026
2Partial evidenceAntwerpen, Belgium51-20067 contacts →

Partial evidence

“At Toreon, we believe that security is vital for people to live and work confidently, with trust in our digital society.”

Source: RevenueBase Database · checked Sep 1, 2026
3Partial evidenceHasselt, Belgium11-5031 contacts →

Partial evidence

“The security experts for best-run companies with SAP systems.”

Source: RevenueBase Database · checked Sep 1, 2026
4Partial evidenceLochristi, Belgium11-5028 contacts →

Partial evidence

“The Collective is a highly-skilled and accredited Microsoft Partner with expertise in security, compliance, endpoint management, and cloud infrastructure.”

Source: RevenueBase Database · checked Sep 1, 2026
5Indirect evidenceBelsele, Belgium11-5027 contacts →

Indirect evidence

“Sertalink is a premier cybersecurity expert in Belgium and Luxembourg, serving as your organization's vigilant guardian in the digital world.”

Source: RevenueBase Database · checked Sep 1, 2026
6Partial evidenceBelgium11-5020 contacts →

Partial evidence

“Resilient Security is your trusted partner in cybersecurity, bridging the gap between big consultancy firms and system integrators.”

Source: RevenueBase Database · checked Sep 1, 2026
7Partial evidenceBelgium11-5020 contacts →

Partial evidence

“At Thales Cyber Solutions Belgium, we strive for security & privacy.”

Source: RevenueBase Database · checked Sep 1, 2026
8Partial evidenceKontich, Belgium11-5018 contacts →

Partial evidence

“ActWise is the partner of choice for securing your identities and protecting what matters most within your company.”

Source: RevenueBase Database · checked Sep 1, 2026
9Partial evidenceTurnhout, Belgium11-5017 contacts →

Partial evidence

“RST consultancy guides your company to the desired level of security.”

Source: RevenueBase Database · checked Sep 1, 2026
10Indirect evidenceErpe-Mere, Belgium11-5012 contacts →

Indirect evidence

“Uw beveiligingsfirma in Oost-Vlaanderen ACTIEF IN 5 DOMEINEN In 2007 richtte Hans Rottiers de beveiligingsfirma Cobra Technology op.”

Source: RevenueBase Database · checked Sep 1, 2026
11Strong evidenceIxelles, Belgium11-5011 contacts →

Strong evidence

“A&P offers consulting expertise in data protection, cybersecurity and IT & Digital governance”

Source: RevenueBase Database · checked Sep 1, 2026
12Indirect evidenceBelgium1-1010 contacts →

Indirect evidence

“Curiosity is a powerful force.”

Source: RevenueBase Database · checked Sep 1, 2026
13Indirect evidenceSint-Niklaas, Belgium1-108 contacts →

Indirect evidence

“Cybersecurity | Algemene IT-diensten | Digitale media Het digitale tijdperk heeft een enorme stroomversnelling gekend afgelopen jaren, dit is een trend die alleen nog maar zal…”

Source: RevenueBase Database · checked Sep 1, 2026
14Indirect evidenceMechelen, Belgium11-507 contacts →

Indirect evidence

“The philosophy underlying our approach is one of open-mindedness and flexibility, whereby we do not restrict ourselves to any particular vendor or product, but instead remain…”

Source: RevenueBase Database · checked Sep 1, 2026
15Indirect evidenceLouvain-La-Neuve, Belgium1-106 contacts →

Indirect evidence

“Expertise spécialisée : Nous sommes à la pointe au niveau des nouvelles technologies informatiques qui sont en perpétuelle évolution.”

Source: RevenueBase Database · checked Sep 1, 2026
16Partial evidencePaal-Beringen, Belgium1-106 contacts →

Partial evidence

“Highly skilled IT consultants with focus on network & security.”

Source: RevenueBase Database · checked Sep 1, 2026
17Partial evidenceAarschot, Belgium1-106 contacts →

Partial evidence

“We help you protect your people, data and operations by delivering integrated consultancy, expert training and engineered solutions that safeguard your organisation from modern…”

Source: RevenueBase Database · checked Sep 1, 2026
18Strong evidenceOverijse, Belgium1-105 contacts →

Strong evidence

“We are a dedicated consulting firm that specialises in technology advisory, with a clear focus on solving data challenges that are faced by businesses.”

Source: RevenueBase Database · checked Sep 1, 2026
19Indirect evidenceHannut, Belgium1-105 contacts →

Indirect evidence

“Guardis helps organizations design, secure and operate their IT infrastructure, from cloud-native environments to industrial systems.”

Source: RevenueBase Database · checked Sep 1, 2026
20Partial evidenceBelgium1-105 contacts →

Partial evidence

“Qualitative Cyber Security and Advice.”

Source: RevenueBase Database · checked Sep 1, 2026
21Partial evidenceZoutleeuw, Belgium1-104 contacts →

Partial evidence

“We are a team of cyber security experts with extensive experience in many industries.”

Source: RevenueBase Database · checked Sep 1, 2026
22Partial evidenceLeuven, Belgium1-103 contacts →

Partial evidence

“He who defends everything, defends nothing” - No IT Security team can monitor every application, network, system and information asset that a company has, no incident response…”

Source: RevenueBase Database · checked Sep 1, 2026
23Indirect evidenceBelgium1-103 contacts →

Indirect evidence

“Leveraging our profound expertise in IT, Cybersecurity and Risk Management, DigiSôter aims to be your preferred partner in aligning these capabilities with your business needs.”

Source: RevenueBase Database · checked Sep 1, 2026
24Indirect evidenceTienen, Belgium1-103 contacts →

Indirect evidence

“The heart of your company has to beat constantly and at the right pace so everything can run smoothly.”

Source: RevenueBase Database · checked Sep 1, 2026
25Strong evidenceLanden, Belgium1-103 contacts →

Strong evidence

“JUVE consulting is your partner in network security solutions.”

Source: RevenueBase Database · checked Sep 1, 2026

Showing 25 of 185 data security consulting firms based in Belgium

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Data security consulting firms based in Belgium at a glance

As of Sep 1, 2026
39.2%Verified-email coverage
3.7%Mobile-number coverage
4.1Average contacts per company
1-10Median size (employees)
11.4%Largest-city concentration · Brussels
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
149
11-50
29
51-200
3
201-500
2

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 data security 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 “data security 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 data security 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 data security 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, 299 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 1, 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 data security 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 data security consulting firms are there based in Belgium?

RevenueBase identified 185 data security 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?

Xalient Benelux, headquartered in Asse, tops this list with the largest team on record.

Which city has the most data security consulting firms?

Brussels leads with 21 headquartered companies, followed by Antwerp (9) and Turnhout (6).

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 299 verified decision-maker contacts tracked across these 185 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 1, 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.