Company lists · Data refreshed September 2026

Top 25 Custom web-based software agencies based in Belgium

Name: Custom web-based software agencies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 743 companies tracked

RevenueBase identified 743 custom web-based software agencies headquartered in Belgium as of September 2026 and tracks 3,689 professional contacts across them, including 1,398 with verified work emails and 90 with mobile numbers. Brussels is the largest hub.

This list covers custom web-based software agencies 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 24, 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 24, 2026 86% judged on-target in blind review

743Companies

3,689Contacts tracked

1,398Verified emails

90Mobile numbers

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The 25 largest custom web-based software agencies based in Belgium

Ranked by team size

Top 25 of 743 custom web-based software agencies based in Belgium, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom web-based software agencies: 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	Alistar	Indirect evidence	Ghent, BelgiumHQ checked Sep 24, 2026	501-1,000	172 contacts →
	Indirect evidence “Alistar is a full-service technology partner that streamlines business operations and accelerates growth with bespoke digital solutions.” Source: RevenueBase Database · checked Sep 24, 2026
2	Ausy Belgium	Indirect evidence	Wilsele, BelgiumHQ checked Sep 24, 2026	1,001-5,000	160 contacts →
	Indirect evidence “At Ausy, we’ve been providing technological solutions for over 30 years.” Source: RevenueBase Database · checked Sep 24, 2026
3	In The Pocket	Indirect evidence	Gent, BelgiumHQ checked Sep 24, 2026	201-500	153 contacts →
	Indirect evidence “In The Pocket is a place for passionate and skilled people to create the best digital products.” Source: RevenueBase Database · checked Sep 24, 2026
4	Infanion	Strong evidence	Tremelo, BelgiumHQ checked Sep 24, 2026	51-200	126 contacts →
	Strong evidence “Infanion is a full-stack custom software development company specialized in custom software solutions, web applications, mobile apps, cloud services and the integrations of all…” Source: RevenueBase Database · checked Sep 24, 2026
5	Allphi	Partial evidence	Westerlo, BelgiumHQ checked Sep 24, 2026	51-200	93 contacts →
	Partial evidence “At AllPhi, we’re more than just a software consultancy company, we’re your partner in building intelligent, future-ready solutions.” Source: RevenueBase Database · checked Sep 24, 2026
6	SIGLI	Partial evidence	Antwerp, BelgiumHQ checked Sep 24, 2026	51-200	86 contacts →
	Partial evidence “Sigli is a dynamic software development company specializing in Digital Product Development and Digital Transformation.” Source: RevenueBase Database · checked Sep 24, 2026
7	Audaxis	Indirect evidence	Braine-l'alleud, BelgiumHQ checked Sep 24, 2026	201-500	84 contacts →
	Indirect evidence “Experts des technologies numériques depuis près de 20 ans, nous sélectionnons les produits les mieux adaptés pour accompagner nos clients dans une transition numérique efficace.” Source: RevenueBase Database · checked Sep 24, 2026
8	Icapps	Indirect evidence	Antwerpen, BelgiumHQ checked Sep 24, 2026	51-200	76 contacts →
	Indirect evidence “We thrive on top-notch applications, innovative technologies, and future-proof products with a steady, solid base.” Source: RevenueBase Database · checked Sep 24, 2026
9	Uniway Belgium	Partial evidence	Brussels, BelgiumHQ checked Sep 24, 2026	51-200	76 contacts →
	Partial evidence “Uniway is a Belgian digital solutions web agency, based in Brussels and Ghent (Belgium), specialized in building digital web solutions based like websites, intranet, e-commerce…” Source: RevenueBase Database · checked Sep 24, 2026
10	5th Floor	Partial evidence	Watermael-boitsfort, BelgiumHQ checked Sep 24, 2026	51-200	73 contacts →
	Partial evidence “5th floor is a Belgian company specializing in software development and IT modernization for the public sector.” Source: RevenueBase Database · checked Sep 24, 2026
11	Inuits	Indirect evidence	Brasschaat, BelgiumHQ checked Sep 24, 2026	51-200	72 contacts →
	Indirect evidence “Working with Inuits means entering into a partnership with a focus on technological innovation.” Source: RevenueBase Database · checked Sep 24, 2026
12	Euricom	Partial evidence	Mechelen, BelgiumHQ checked Sep 24, 2026	51-200	71 contacts →
	Partial evidence “Sinds bouwen we bij Euricom software op maat die onze klanten vooruit helpt.” Source: RevenueBase Database · checked Sep 24, 2026
13	TACTA	Partial evidence	St-lambrechts-woluwe, BelgiumHQ checked Sep 24, 2026	51-200	61 contacts →
	Partial evidence “Tacta is a software development company specialized in the digitalization and optimization of business processes for large-scale organizations.” Source: RevenueBase Database · checked Sep 24, 2026
14	PHPRO	Indirect evidence	Kontich, BelgiumHQ checked Sep 24, 2026	51-200	60 contacts →
	Indirect evidence “At PHPro, we build high-performing websites, e-commerce platforms, and applications that truly make an impact, always aligned with your strategic goals.” Source: RevenueBase Database · checked Sep 24, 2026
15	Sparklink	Indirect evidence	Antwerp, BelgiumHQ checked Sep 24, 2026	11-50	58 contacts →
	Indirect evidence “We build digital solutions that automate and liberate.” Source: RevenueBase Database · checked Sep 24, 2026
16	DEUSE	Indirect evidence	Liège, BelgiumHQ checked Sep 24, 2026	11-50	52 contacts →
	Indirect evidence “Deuse is a computer engineering company specialised in tailor-made developments and digital tools for all your bold projects.” Source: RevenueBase Database · checked Sep 24, 2026
17	Kunlabora	Strong evidence	Leuven, BelgiumHQ checked Sep 24, 2026	51-200	52 contacts →
	Strong evidence “Custom software development experts.” Source: RevenueBase Database · checked Sep 24, 2026
18	Calibrate	Indirect evidence	Kontich, BelgiumHQ checked Sep 24, 2026	51-200	52 contacts →
	Indirect evidence “In the past 15 years, we have gained large expertise in consulting organizations in various industries on developing tailor made solutions using various open source tools and…” Source: RevenueBase Database · checked Sep 24, 2026
19	Lemon Companies	Indirect evidence	Kontich, BelgiumHQ checked Sep 24, 2026	51-200	50 contacts →
	Indirect evidence “Business impact creëren met onze digitale oplossingen.” Source: RevenueBase Database · checked Sep 24, 2026
20	Nascom	Indirect evidence	Genk, BelgiumHQ checked Sep 24, 2026	11-50	47 contacts →
	Indirect evidence “We are different, and believe we are uniquely positioned between business and IT, with a strong emphasis on enterprise integrations.” Source: RevenueBase Database · checked Sep 24, 2026
21	Nish Tech BV	Indirect evidence	St-stevens-woluwe, BelgiumHQ checked Sep 24, 2026	51-200	46 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 24, 2026
22	DJM Digital	Partial evidence	Visé, BelgiumHQ checked Sep 24, 2026	11-50	45 contacts →
	Partial evidence “Spécialisée dans les technologies web et mobiles, djm digital est une agence digitale qui réalise pour vous des projets innovants depuis En plus de développer des sites web et des…” Source: RevenueBase Database · checked Sep 24, 2026
23	SERSO	Indirect evidence	Lummen, BelgiumHQ checked Sep 24, 2026	11-50	43 contacts →
	Indirect evidence “Bij SerSo geloven we dat technologie pas echt waardevol is wanneer ze organisaties helpt groeien.” Source: RevenueBase Database · checked Sep 24, 2026
24	Qframe NV	Indirect evidence	Kontich, BelgiumHQ checked Sep 24, 2026	11-50	42 contacts →
	Indirect evidence “Qframe bouwt maatwerksoftware voor wanneer de kant-en-klare bouwblokken niet passen.” Source: RevenueBase Database · checked Sep 24, 2026
25	Synchrone	Indirect evidence	Barchon, BelgiumHQ checked Sep 24, 2026	11-50	40 contacts →
	Indirect evidence “Synchrone is a Belgian digital agency offering complete solutions for website creation & e-commerce, tailor-made development and digital marketing.” Source: RevenueBase Database · checked Sep 24, 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: custom web-based software agencies. 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 custom web-based software agencies.
Partial evidence: Its own public description names part of custom web-based software agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom web-based software agencies. 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 743 custom web-based software agencies based in Belgium

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Custom web-based software agencies based in Belgium at a glance

As of Sep 24, 2026

37.9%Verified-email coverage

2.4%Mobile-number coverage

5.0Average contacts per company

1-10Median size (employees)

5.8%Largest-city concentration · Brussels

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

746

11-50

145

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 26.0d

1,7860–30

48931–60

2461–90

490–180

7180+

Company record updated

Median 79.0d

00–30

1,47731–60

2,46061–90

1,65290–180

308180+

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 custom web-based software agencies, 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 “custom web-based software agencies”. 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 custom web-based software agencies), 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 custom web-based software agencies, 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, 1,398 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 24, 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.

Custom web-based software agencies by metro

Custom web-based software agencies in Brussels43
Custom web-based software agencies in Bruxelles32

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 custom web-based software agencies, 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 custom web-based software agencies are there based in Belgium?

RevenueBase identified 743 custom web-based software agencies 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?

Alistar, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most custom web-based software agencies?

Brussels leads with 43 headquartered companies, followed by Bruxelles (32) and Antwerpen (22).

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 1,398 verified decision-maker contacts tracked across these 743 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 24, 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.