Company lists · Data refreshed September 2026

Top 25 Open source marketing agencies based in Belgium

RevenueBase identified 244 company matches for open source marketing agencies associated with Belgium as of September 2026 and tracks 6,001 professional contacts across them, including 1,519 with verified work emails. Brussels is the largest hub.

This list covers company matches for open source marketing agencies associated with Belgium, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built
244Companies
6,001Contacts tracked
1,519Verified emails
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The 25 largest open source marketing agencies based in Belgium

Ranked by team size
Top 25 of 244 company matches for open source marketing agencies based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHerentals, BelgiumHQ recorded Sep 29, 20261,001-5,0003,670 contacts →

Exact match

“iO is an AI-native partner in marketing and technology, with experts across 12 campuses in Belgium, the Netherlands, Sweden, Denmark and Bulgaria.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchHeverlee, BelgiumHQ recorded Sep 29, 2026n/a273 contacts →

Exact match

“we are there now.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchSchelle, BelgiumHQ recorded Sep 29, 202651-200199 contacts →

Exact match

“We are the digital extension to your sales, marketing and communications department.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchGenk, BelgiumHQ recorded Sep 29, 202651-20075 contacts →

Exact match

“Dignify is a digital services agency specialised in marketing technology.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchBrasschaat, BelgiumHQ recorded Sep 29, 202651-20072 contacts →

Exact match

“Working with Inuits means entering into a partnership with a focus on technological innovation.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchGhent, BelgiumHQ recorded Sep 29, 202651-20060 contacts →

Exact match

“The Reference is a committed digital agency of 160+ creative thinkers, driven by knowledge and craftsmanship.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchWierde, BelgiumHQ recorded Sep 29, 202611-5053 contacts →

Exact match

“Expansion est une agence intégrée de marketing et communication.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchKontich, BelgiumHQ recorded Sep 29, 202651-20052 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchBrussels, BelgiumHQ recorded Sep 29, 202651-20048 contacts →

Exact match

“Havas aims to be the world’s best company at creating meaningful connections between people and brands using creativity, media and innovation.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchBarchon, BelgiumHQ recorded Sep 29, 202611-5040 contacts →

Exact match

“Synchrone is a Belgian digital agency offering complete solutions for website creation & e-commerce, tailor-made development and digital marketing.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchDiegem, BelgiumHQ recorded Sep 29, 2026201-50026 contacts →

Exact match

“Customer Collective is one of Europe’s leading marketing and technology collectives, delivering niche expertise that lets ambitious companies break away from the competition – and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchLeuven, BelgiumHQ recorded Sep 29, 202611-5026 contacts →

Exact match

“Piros is a Red Hat & Open Source eco-system within De Cronos Groep that covers the full Red Hat product portfolio.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchMons, BelgiumHQ recorded Sep 29, 202611-5023 contacts →

Exact match

“Founded in 2006, WebstanZ is a digital Agence specialized in the Drupal CMS.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchAntwerp, BelgiumHQ recorded Sep 29, 202611-5023 contacts →

Exact match

“Kangaroot has more than 25 years Open Source Expertise.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchGeel, BelgiumHQ recorded Sep 29, 202611-5019 contacts →

Exact match

“Our communication strategists and advisors will create impactful actions for sales, internal, brand and public communication.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchKontich, BelgiumHQ recorded Sep 29, 202611-5019 contacts →

Exact match

“We help companies define their digital marketing strategy, building the required digital solutions as well as providing the skills and know-how to implement the strategy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchAntwerp, BelgiumHQ recorded Sep 29, 202611-5017 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchLiège, BelgiumHQ recorded Sep 29, 202611-5016 contacts →

Exact match

“Oh!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchSchaerbeek, BelgiumHQ recorded Sep 29, 202611-5016 contacts →

Exact match

“OpenGraphy is a leading digital agency that blends cutting-edge technologies with creative expertise to deliver high-impact solutions for web and social media.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchHasselt, BelgiumHQ recorded Sep 29, 202611-5015 contacts →

Exact match

“Miles & Mates is een allround digitaal bureau.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchAntwerp, BelgiumHQ recorded Sep 29, 202651-20015 contacts →

Exact match

“Citizens is a collective of five leading digital agencies from Belgium and the Netherlands.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchKontich, BelgiumHQ recorded Sep 29, 202611-5014 contacts →

Exact match

“Wij zijn Are Agency, het digital marketing bureau uit Antwerpen.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchAalst, BelgiumHQ recorded Sep 29, 202611-5014 contacts →

Exact match

“Green Bananas zag het levenslicht in 2011.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchMechelen, BelgiumHQ recorded Sep 29, 20261-1012 contacts →

Exact match

“Jouw verhaal.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchGhent, BelgiumHQ recorded Sep 29, 202611-5012 contacts →

Exact match

“Fluo is a team with a lot of enthusiasm to assist your organisation with thoughtful digital marketing and brand strategy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 244 open source marketing agencies based in Belgium

See the full list, filter by size, metro and specialty, and access 1,519 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Open source marketing agencies based in Belgium at a glance

As of Sep 29, 2026
25.3%Verified-email coverage
24.6Average contacts per company
1-10Median size (employees)
9.8%Largest-city concentration · Brussels
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
190
11-50
39
51-200
10
201-500
1
1,001-5,000
2

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 244 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Belgium whose business descriptions match “open source marketing agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,519 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “open source marketing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many open source marketing agencies are there based in Belgium?

RevenueBase identified 244 company matches for open source marketing agencies associated with Belgium as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

IO tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most open source marketing agencies?

Brussels leads with 24 company records, followed by Antwerp (15) and Ghent (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,519 professional contacts with verified work emails tracked across these 244 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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.