Company lists · Data refreshed September 2026

Top 25 Secure software development companies based in Belgium

RevenueBase identified 181 secure software development companies headquartered in Belgium as of September 2026 and tracks 2,084 professional contacts across them, including 1,065 with verified work emails and 92 with mobile numbers. Brussels is the largest hub.

This list covers secure software development companies 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
181Companies
2,084Contacts tracked
1,065Verified emails
92Mobile numbers
Explore all 181 companies → Free signup · no credit card · 500 free credits

The 25 largest secure software development companies based in Belgium

Ranked by team size
Top 25 of 181 secure software development companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names secure software development companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
EASIStrong evidence
Nivelles, BelgiumHQ checked Sep 6, 2026501-1,000739

“Easi is a Belgian IT company founded in offering state-of-the-art solutions and services to the mid-market, in the domains of software development, IT infrastructure, cloud and…”

Source: company website · checked Sep 6, 2026
2
Nviso SecurityPartial evidence
Brussels, BelgiumHQ checked Sep 6, 2026201-500315

“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, 2026
3
Aikido SecurityPartial evidence
Ghent, BelgiumHQ checked Sep 6, 2026201-500154

“From vulnerability management to penetration testing, secure everything you build, host, and run with Aikido.”

Source: company website · checked Sep 6, 2026
4
ToreonPartial evidence
Antwerpen, BelgiumHQ checked Sep 6, 202651-20067

“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 6, 2026
5
EONIXIndirect evidence
Mons, BelgiumHQ checked Sep 6, 202651-20053

“Vous êtes IT Manager dans une organisation qui gère des données sensibles?”

Source: company website · checked Sep 6, 2026
6
ACENIndirect evidence
Kontich, BelgiumHQ checked Sep 6, 202651-20051

“Tailored, end-to-end solutions, suited to your cybersecurity needs.”

Source: company website · checked Sep 6, 2026
7
Nish Tech BVIndirect evidence
St-stevens-woluwe, BelgiumHQ checked Sep 6, 202651-20046

“At NISH Tech BV, we don’t just deliver cutting-edge IT solutions, we build careers, nurture talent, and create an environment where innovation thrives.”

Source: company website · checked Sep 6, 2026
8
Keystone SolutionsIndirect evidence
Brussels, BelgiumHQ checked Sep 6, 202651-20042

“At Keystone Solutions, we specialize in bridging technology and talent to deliver a seamless IT experience.”

Source: company website · checked Sep 6, 2026
9
SecwisePartial evidence
Leuven, BelgiumHQ checked Sep 6, 202611-5028

“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 6, 2026
10
SertalinkIndirect evidence
St-niklaas, BelgiumHQ checked Sep 6, 202611-5028

“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, 2026
11
OPNSPartial evidence
Antwerp, BelgiumHQ checked Sep 6, 202611-5023

“Leading OPNS, a cybersecurity firm designing and implementing enterprise-grade, vendor-neutral security architectures for banks, healthcare institutions, and government…”

Source: company website · checked Sep 6, 2026
12
Nomios BelgiumPartial evidence
Zaventem, BelgiumHQ checked Sep 6, 202611-5020

“We are committed to developing solutions and services that secure and connect the increasingly complex digital landscape.”

Source: company website · checked Sep 6, 2026
13BelgiumHQ checked Sep 6, 202611-5020

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

Source: company website · checked Sep 6, 2026
14
Cresco CybersecurityIndirect evidence
Belgium France Luxembourg Netherlands, BelgiumHQ checked Sep 6, 202611-5019

“Cresco is your partner in cybersecurity.”

Source: company website · checked Sep 6, 2026
15
Resilient SecurityPartial evidence
Antwerp, BelgiumHQ checked Sep 6, 202611-5018

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

Source: company website · checked Sep 6, 2026
16
Actwise, An Acen CompanyPartial evidence
Kontich, BelgiumHQ checked Sep 6, 202611-5018

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

Source: company website · checked Sep 6, 2026
17
RedsystemIndirect evidence
Froyennes, BelgiumHQ checked Sep 6, 202611-5018

“Our mission is to advise and support you in minimizing the attack surface that could threaten your business.”

Source: company website · checked Sep 6, 2026
18
BIG Water Consulting BWCIndirect evidence
Brussels, BelgiumHQ checked Sep 6, 202611-5017

“BIG WATER CONSULTING (BWC), we have been helping clients deliver successful projects.”

Source: company website · checked Sep 6, 2026
19
AdimianIndirect evidence
Brussels, BelgiumHQ checked Sep 6, 202611-5012

“You work in a complex world where standard applications cannot fulfill all your business needs.”

Source: company website · checked Sep 6, 2026
20
Assyst EuropeIndirect evidence
BelgiumHQ checked Sep 6, 202611-5010

“ASSYST Europe is a growing IT services company located in Brabant Wallon.”

Source: company website · checked Sep 6, 2026
21
CuriosIndirect evidence
Antwerp, BelgiumHQ checked Sep 6, 20261-1010

“Curios is a boutique cybersecurity and compliance consultancy in Antwerp, serving enterprises across Belgium and Europe.”

Source: company website · checked Sep 6, 2026
22
NetcureIndirect evidence
Zaventem, BelgiumHQ checked Sep 6, 20261-109

“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 6, 2026
23
I-LogsPartial evidence
1000, BelgiumHQ checked Sep 6, 202611-509

“i-Logs helps companies secure, manage, and evolve their IT environments, from infrastructure and cloud to cybersecurity and custom applications.”

Source: company website · checked Sep 6, 2026
24
Triple DStrong evidence
Moerbeke, BelgiumHQ checked Sep 6, 20261-108

“Triple D is a belgian software development company founded by and consisting entirely out of veteran software engineers.”

Source: company website · checked Sep 6, 2026
25
Brand Solutions EuropeIndirect evidence
Sint-niklaas, BelgiumHQ checked Sep 6, 20261-108

“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: company website · checked Sep 6, 2026

Showing 25 of 181 secure software development companies based in Belgium

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,065 reachable decision-makers.

Free signup · no credit card

See all 181 companies

Secure software development companies based in Belgium at a glance

As of Sep 6, 2026
1-10Median size (employees)
BrusselsLargest hub · 18 HQs
92Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
138
11-50
30
51-200
7
201-500
4
501-1,000
1
1,001-5,000
1

Verified emails by last verification

0–30
1,014
31–60
49
61–90
1
90–180
0
180+
1

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 secure software development companies, 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 “secure software development companies”. 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 secure software development companies, 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, 1,065 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 secure software development companies are there based in Belgium?

RevenueBase identified 181 secure software development companies 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?

EASI, headquartered in Nivelles, tops this list with the largest team on record.

Which city has the most secure software development companies?

Brussels leads with 18 headquartered companies, followed by Antwerp (8) and Bruxelles (7).

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 1,065 verified decision-maker contacts tracked across these 181 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.

Ready to reach these companies? Verified emails and direct dials for all 181 secure software development companies based in Belgium. Start with a free account, no credit card.

Get the full list

Related lists

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.