Company lists · Data refreshed September 2026
Top 25 Security monitoring services based in Belgium
RevenueBase identified 229 security monitoring services headquartered in Belgium as of September 2026 and tracks 2,220 professional contacts across them, including 724 with verified work emails and 37 with mobile numbers. Brussels is the largest hub.
This list covers security monitoring services 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 6, 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 security monitoring services based in Belgium
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 315 | ||||
“NVISO is a cyber security services firm composed of outstanding security professionals - each has a specific field of expertise, ranging from security research and risk management…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Verisure BelgiumIndirect evidence | 205 | |||
“Overview Verisure is the leading provider of peace of mind and protection to residential and small business customers across Europe and Latin America.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 102 | ||||
“Cybersecurity company Secutec was founded in 2005 and is considered an authority in the field of cybersecurity, threat intelligence, and incident response services tailored to…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 96 | ||||
“Voor ieder beveiligingsrisico de gepaste oplossing!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 85 | ||||
“Alertis NV is een van de belangrijkste spelers in branddetectie in Vlaanderen met een heldenteam van 125 gepassioneerde professionals.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 53 | ||||
“Entreprise De Gardiennage et de Surveillance” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 52 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 34 | ||||
“Bienvenue chez Optimalis Security S.A.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 31 | ||||
“GDW Security is ready to serve everyone who values safety.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 30 | ||||
“Voldoen aan elke verwachting van de klant: dát is de slogan van beveiligingsbedrijf Watchguard Security, al vijftien jaar lang uw specialist en partner in elektronische…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | Jojo SystemsIndirect evidence | 30 | |||
“Uw telecom en beveiliging?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 28 | ||||
“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 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 28 | ||||
“Since its foundation more than 30 Years ago, ISS has been providing technologies that combine innovation, quality and reliability.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 26 | ||||
“Are you looking for a stable and reliable partner to handle your security?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 23 | ||||
“Inbraakveilig Group - totaalbeveiliging die werkt.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 | ||||
“DC Security staat reeds meer dan 30 jaar garant voor een totaaloplossing inzake de beveiliging van particulieren en bedrijven.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Thales Cyber Solutions BelgiumPartial evidence | 20 | |||
“At Thales Cyber Solutions Belgium, we strive for security & privacy.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 19 | ||||
“Inbraak- en brandbeveiliging / camerabewaking / buitenbeveiliging / toegangscontrole / bewaking: UW beveiliging op maat!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 | ||||
“Cresco is your partner in cybersecurity.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 | ||||
“VESTAGuard Security is een jong & dynamisch bewakingsbedrijf dat begrippen als veiligheidsgarantie, bescherming, zekerheid en vertrouwen hoog in het vaandel draagt.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 18 | ||||
“Resilient Security is your trusted partner in cybersecurity, bridging the gap between big consultancy firms and system integrators.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 18 | ||||
“ActWise is the partner of choice for securing your identities and protecting what matters most within your company.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 18 | ||||
“Our mission is to advise and support you in minimizing the attack surface that could threaten your business.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 15 | ||||
“MVH Security staat voor KWALITEIT – BETROUWBAARHEID – EERLIJKHEID - SOEPELHEID – SERVICE - SNELHEID Al deze troeven wensen wij dagelijks in te zetten voor zowel de particuliere…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 229 security monitoring services based in Belgium
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Security monitoring services based in Belgium at a glance
As of Sep 6, 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 security monitoring services, 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 “security monitoring services”. 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 security monitoring services, 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, 724 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 6, 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
How many security monitoring services are there based in Belgium?
RevenueBase identified 229 security monitoring services 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?
Nviso Security, headquartered in Belgium, tops this list with the largest team on record.
Which city has the most security monitoring services?
Brussels leads with 5 headquartered companies, followed by Kontich (4) and Kortrijk (4).
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 724 verified decision-maker contacts tracked across these 229 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 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.
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