Company lists · Data refreshed September 2026
Top 25 Information security consulting firms based in Belgium
RevenueBase identified 304 information security consulting firms headquartered in Belgium as of September 2026 and tracks 5,275 professional contacts across them, including 2,735 with verified work emails and 115 with mobile numbers. Brussels is the largest hub.
This list covers information 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.
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.
The 25 largest information security consulting firms based in Belgium
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 93 | ||||
“Approach Cyber is a trusted cyber resilience partner supporting organizations across Belgium and Switzerland.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 89 | ||||
“Spotit is the trusted advisor for its customers and collaborates with them on innovative security & networking architectures that bring a big strategic advantage and insight.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 67 | ||||
“At Toreon, we believe that security is vital for people to live and work confidently, with trust in our digital society.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 50 | ||||
“Tailored, end-to-end solutions, suited to your cybersecurity needs.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 31 | ||||
“The security experts for best-run companies with SAP systems.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 29 | ||||
“As Belgium’s largest Microsoft Security team and #1 Microsoft Gold Security Partner of the BeLux, we provide you a solid end-to-end security strategy to protect your organization…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 28 | ||||
“The Collective is a highly-skilled and accredited Microsoft Partner with expertise in security, compliance, endpoint management, and cloud infrastructure.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 27 | ||||
“Sertalink is a premier cybersecurity expert in Belgium and Luxembourg, serving as your organization's vigilant guardian in the digital world.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 22 | ||||
“DC Security staat reeds meer dan 30 jaar garant voor een totaaloplossing inzake de beveiliging van particulieren en bedrijven.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 | ||||
“As a strategic partner of Okta, SailPoint, Wiz, and Netskope, we deliver end-to-end cybersecurity across identity, cloud, and data.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 20 | ||||
“Resilient Security is your trusted partner in cybersecurity, bridging the gap between big consultancy firms and system integrators.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | Thales Cyber Solutions BelgiumPartial evidence | 20 | |||
“At Thales Cyber Solutions Belgium, we strive for security & privacy.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 19 | ||||
“The main goal of the Security Factory is to test/assess the current security maturity level of clients.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 | ||||
“ActWise is the partner of choice for securing your identities and protecting what matters most within your company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 18 | ||||
“Our mission is to advise and support you in minimizing the attack surface that could threaten your business.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 17 | ||||
“RST consultancy guides your company to the desired level of security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 16 | ||||
“Notre collaboration vous permet de vous défendre face aux diverses cyberattaques complexes et structurées pour protéger vos actifs, hébergés en interne ou dans le Cloud, et ainsi…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 15 | ||||
“At Privatum, we understand that information forms the foundation of the modern business world.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 12 | ||||
“Uw beveiligingsfirma in Oost-Vlaanderen ACTIEF IN 5 DOMEINEN In 2007 richtte Hans Rottiers de beveiligingsfirma Cobra Technology op.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | Easi NetworkPartial evidence | 11 | |||
“EASI Network : Société de services et de conseils active dans les réseaux informatiques, IoT et télécoms à destination des entreprises et des institutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 | ||||
“A&P offers consulting expertise in data protection, cybersecurity and IT & Digital governance” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 10 | ||||
“At Splynter we want to help companies understand their adversaries and how to combat them.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 10 | ||||
“Curiosity is a powerful force.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 9 | ||||
“In a world where everything is connected and people are online all the time, data and resources are distributed and mobile.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 9 | ||||
“Spinae provides independent advice and support to companies regarding information security, industrial control system security (ICS security) and computer networks.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 304 information security consulting firms based in Belgium
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Information security consulting firms based in Belgium at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 information security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Belgium whose own description of what they do matches “information security consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among information 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 an evidence 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, 2,735 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 3, 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.
Information security consulting firms by metro
- Information security consulting firms in Brussels28
Frequently asked
How many information security consulting firms are there based in Belgium?
RevenueBase identified 304 information 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?
Approach Cyber, headquartered in Mechelen, tops this list with the largest team on record.
Which city has the most information security consulting firms?
Brussels leads with 28 headquartered companies, followed by Antwerp (11) and Antwerpen (9).
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 2,735 verified decision-maker contacts tracked across these 304 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 3, 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.
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