B2B marketing agency Belgium · B2B communicatiebureau · marketing bureau
B2B marketing agency Belgium Flanders, Wallonia and Brussels
GTM Quest is a London go-to-market agency for B2B teams selling into Belgium.
We build the plan, the account lists and the outreach around Belgium's rule that lets you email info@ but not jan.peeters@.
We also help you brief a B2B communicatiebureau or agence where the work needs Dutch or French.
Then the guide: how B2B marketing is bought in a country of three language markets, the rules, and ten Belgian B2B agencies re-checked on their own websites in September 2026.
Reviewed by Dan Keegan, GTM Quest · 28 September 2026 · 22 sources linked below
Entering Belgium with uswhat we undertake
- 01LinkedIn and warm introductionsDAY 1FIRST BELGIAN ACCOUNTS
- 02Market, ICP and listsWEEKS 1 TO 2NL · FR · EN
- 03Compliant email joinsWEEKS 2 TO 4INFO@ VS NAMED
- 04Local partner briefAS NEEDEDDUTCH · FRENCH
Belgian agencies checked10
01/ our service
Selling into Belgium what GTM Quest does for you
We are based in London and do not pretend to be a Belgian bureau.
What we bring is the go-to-market work: who to target, what to say, how to reach them lawfully under Belgian rules, and how to measure it.
01
A go-to-market plan for Belgium
Which segments to enter first, which accounts are worth pursuing, and what you will say to them.
Written down in the first weeks while the first conversations run, and before any money goes on media or an agency retainer.
02
Account lists you own
Target accounts and the people in each buying group, enriched in Clay and held in a Postgres database that stays with you.
Built for Belgium company data, not a UK list with the country changed.
03
Outreach that respects local rules
Email, LinkedIn and calls sequenced around what the Belgium rules allow, not around the UK's corporate-subscriber exemption, which most of Europe does not have.
04
LinkedIn and founder-led content
Posts and paid LinkedIn aimed at the same account list, so outreach arrives from a name buyers have already seen.
English first, local language where it matters.
05
A local agency, briefed properly
Belgium needs Dutch for Flanders and French for Wallonia.
Where the work needs either, we write the brief, shortlist Belgian agencies and sit in the pitch with you, so every bureau quotes for the same thing.
06
A system you keep
Documented, trained and handed over.
The lists, sequences, dashboards and playbooks stay with you when the engagement ends.
The motion starts on day one through LinkedIn, content and warm introductions; email joins once the lists separate impersonal company addresses from named ones.
If you are also selling into the Netherlands, much of the Dutch-language work carries over; the email rules do not.
02/ engagement
How we work with teams selling into Belgium
Every engagement starts the same way: the motion on day one through LinkedIn, content and warm introductions, with the system built around it.
The difference is who runs it afterwards.
How much of your Belgium go-to-market do you want to own?
Handover
We build the system, your team runs it
Plan, account lists, sequences, content calendar and reporting for Belgium, then training and a written handover.
- ✓ Market-entry plan
- ✓ Account lists and data layer
- ✓ Sequences and templates
- ✓ Full documentation
Best when you have someone in-market or a local hire starting soon.
Handover + support
We hand over, then stay close
Everything in Handover, then one or two days a week of senior help to optimise and troubleshoot.
- ✓ Everything in Handover
- ✓ Weekly optimisation
- ✓ Deliverability monitoring
- ✓ Local-agency briefing support
Best for teams building their own capability.
Embedded
We run the programme as part of your team
Daily campaign management, reply triage, content and weekly reporting on meetings and pipeline.
- ✓ Daily campaign management
- ✓ Same-day reply triage
- ✓ LinkedIn content and ads
- ✓ Weekly pipeline report
Best when nobody on your side has the time.
Scale
One data layer across your European markets
Belgium alongside the UK and other European markets, run from one account list and one reporting view, with local partners where language demands it.
- ✓ Multi-market account lists
- ✓ ABM for named accounts
- ✓ Local partners coordinated
- ✓ One shared data layer
Best for teams expanding across Europe in one push.
What it costs. Every engagement is scoped and quoted in writing after the discovery call.
Media, data and tools are separate lines.
More on the model: how we work as a GTM agency, our ABM agency London service, demand generation and lead generation.
03/ the market
How B2B marketing is bought in Belgium three language markets
Belgium is small in area and busy in business: Statbel counted 1,187,819 VAT-registered enterprises at 31 December 2024, up 1.6% in a year.
In 2024, 113,289 businesses were founded and 94,532 stopped trading.
It is also three markets.
Flanders works in Dutch, Wallonia in French, and Brussels in both, with English common in the capital's international firms and EU-adjacent sectors.
An agency's website language tells you its centre of gravity: Umbau and Customer Impact lead in Dutch, Stratenet in French, while BBC, LeadFabric, Handlangers, MakeWaves and The House of Marketing lead in English.
Belgium has an established B2B-specialist tradition.
BBC says it was founded in 1983 and reported €11.4m revenue in 2024 (BBC); LeadFabric was founded in 2008 and represented Eloqua, Marketo and Pardot in Europe early (LeadFabric).
Many of the B2B specialists sit in the Mechelen, Antwerp and Ghent triangle rather than in Brussels.
B2B communicatiebureau, marketing bureau or agence?
In Flanders, buyers search for a "B2B communicatiebureau" or "B2B marketingbureau"; in Wallonia and Brussels, an "agence marketing B2B".
The labels describe the same thing.
What differs is the language of delivery, so decide first which region you are entering.
The trade body
ACC Belgium is the association of communication agencies.
Membership is a sign an agency is established, not a quality mark.
04/ the rules
B2B email in Belgium the impersonal-address exemption
Belgium has a genuine B2B carve-out, narrower than the UK’s.
General information, not legal advice.
What this means in practice. A Belgian programme can email impersonal company addresses about business products, and needs another route to named people: LinkedIn, events, content, calls.
Ask any bureau how it tells an impersonal address from a personal one in a bought list.
The burden of proof is yours.
05/ language
Working with a Belgian agency in English and when you need Dutch or French
Belgium ranks 9th of 123 in the EF English Proficiency Index 2025, with a score of 608; Brussels scores 588 in EF's city table (EF EPI 2025 report).
English works for most B2B conversations with larger companies.
It does not replace local-language marketing.
Content, search and events aimed at Flemish SMEs need Dutch; in Wallonia, French.
Of the ten agencies here, BBC, LeadFabric, Handlangers, MakeWaves and The House of Marketing lead in English; Living Stone publishes in Dutch with English pages; D'M&S leads in Dutch; Stratenet works in French and English; Umbau and Customer Impact lead in Dutch.
06/ shortlist
Which kind of Belgian agency do you need?
Pick the problem you are solving.
Each answer names agencies from the list below whose own sites say this is what they do.
What do you need most?
Brand
A B2B creative or content specialist
For messaging, brand and content that explains industrial, technical or healthcare products.
- ✓ BBC (Mechelen, Ghent)
- ✓ Living Stone (Gentbrugge)
- ✓ Umbau (Mechelen)
- ✓ D’M&S (Bruges, Antwerp, Brussels)
Ask for work in your sector.
Demand
A demand-generation or ABM agency
For campaigns tied to pipeline, account-based programmes and buying-group engagement.
- ✓ Handlangers (Ghent, Amsterdam)
- ✓ LeadFabric (Mechelen)
- ✓ MakeWaves (Kontich, Merelbeke)
Agree what counts as a qualified opportunity.
MarTech
A marketing-technology partner
For marketing automation, CRM and data: Eloqua, Marketo, HubSpot, Salesforce.
- ✓ LeadFabric (enterprise martech)
- ✓ Stratenet (HubSpot, Namur)
Check tiers in HubSpot's directory.
Interim
Interim marketers and consulting
For a marketing manager or consultant who joins your team for a period.
- ✓ The House of Marketing (Machelen)
Consulting and interim, not media or campaigns.
Performance
A digital marketing bureau
For SEO, Google Ads and lead generation, often for SMEs.
- ✓ Customer Impact (Antwerp)
- ✓ MakeWaves
Check how much of the work is B2B.
GTM
A go-to-market partner for Belgium
For the plan, account lists, compliant outreach and measurement, with a Belgian bureau briefed for Dutch or French work.
That is what we do.
- ✓ Market-entry plan
- ✓ Account lists you own
- ✓ Outreach built for the Belgian rule
- ✓ Local bureau briefed
07/ build or buy
A Belgian bureau or a London GTM partner? honest trade-offs
Teams entering Belgium often use both, in order.
→ Start with the plan and the accounts; bring in a bureau for the language-dependent work.
→ A network gives reach; a GTM partner gives one system. Ask which you are paying for.
→ Prove the motion with us, then hire into it. We hand over the playbook.
08/ buying
How to choose a B2B marketing agency in Belgium five steps from abroad
The order matters.
Each step removes agencies that would have wasted a pitch meeting.
Write one brief and send it to everyone
Your ICP, the Belgium segments you want first, the budget band, what you already run and what "good" looks like after six months.
Agencies quoting on the same brief can be compared; agencies quoting on a phone call cannot.
- ✓ ICP and first segments
- ✓ Budget band, not a number
- ✓ What you run today
- ✓ The measure of success
Test the language, not the homepage
Open three deep pages on each shortlisted site: a case study, a service page, a blog post.
If they fall back to Dutch or French, delivery probably will too.
Fine with a local team; costly without one.
- ✓ Three deep URLs
- ✓ Case studies in English?
- ✓ Who writes the English copy?
Ask for the lawful basis of the first email
Belgian guidance allows email to impersonal company addresses but not to named people without consent (Infoshopping.be).
Any agency that cannot explain how its first outbound email is lawful in Belgium should not be sending it for you.
- ✓ Generic or named addresses?
- ✓ Consent or exemption?
- ✓ How objections are recorded
Check credentials where they are issued
Look up partner tiers in the vendor's own directory, such as HubSpot's Solutions Partner directory, and membership on the trade body's site (ACC Belgium).
A badge on the agency's homepage proves nothing on its own.
- ✓ Vendor directory, not the badge
- ✓ Trade-body member list
- ✓ Named clients you can call
Start with a pilot you can end
Three months, a written scope, one region first.
None of the ten agencies here publishes prices, so ask for a fixed-scope pilot quote.
Keep the CRM, ad accounts and data in your name.
- ✓ Three months, written scope
- ✓ Break clause
- ✓ You own the data and accounts
09/ what it costs
What a Belgian B2B marketing agency costs why there is no range here
None of the ten Belgian agencies on this page publishes prices on its own site.
Stratenet says only that its budgets are "100% adaptés à votre projet".
"From €1,000" figures you may see against Belgian agencies on directory sites are self-declared minimums, not rate cards.
Ask for a written scope instead.
10/ agencies
Belgian agencies worth knowing ten, checked on their own sites
Alphabetical, not ranked.
Each line is what the agency says on its own website, re-read on 28 September 2026.
Nobody paid to appear.
Mechelen, Ghent · English
BBC
A B2B creative agency for business and industrial brands: brand and message, media and performance, content and creative, technology.
Its own facts: founded 1983, €11.4m revenue in 2024, more than 60 employees, offices in Mechelen, Ghent, Bordeaux and Chicago, member of the E3 network (BBC).
Antwerp · Dutch
Customer Impact
A digital marketing bureau with an Antwerp office, working remote-first with partners in Amsterdam, Rotterdam, Berlin and Paris; the trading company is registered in Malta (contact).
SEO, Google Ads and lead generation.
Bruges, Antwerp, Brussels · Dutch
D’M&S
A cross-media communication agency (strategy, creative, design studio, media and web) with offices in Bruges, Antwerp, Brussels, Utrecht and Lille (contact).
B2B and B2C.
Ghent, Amsterdam · English
Handlangers
A B2B marketing agency focused on demand-generation programmes for IT, tech and real estate, with a channel-marketing portfolio; work for Telenet Business, Safety Jogger and Tente.
Mechelen · English
LeadFabric
B2B go-to-market end to end (research, GTM design, martech and campaigns) for mid-market and enterprise; founded 2008 (LeadFabric), head office in Mechelen (about), and "we kill the Marketing Qualified Lead" as its stated position.
Gentbrugge · Dutch
Living Stone
A B2B marketing agency for healthcare and engineering, including customer reference marketing for ABB and market discovery for Palo Alto Networks (contact).
Kontich, Merelbeke · English
MakeWaves
B2B conversion marketing: growth marketing with ABM, performance marketing and web development (contact).
Namur · French
Stratenet
A HubSpot CRM and growth agency; Platinum Solutions Partner in HubSpot's directory, a HubSpot partner since 2016 and working with clients since 2009 (Stratenet).
Machelen · English
The House of Marketing
Interim marketing management, strategic consulting and talent search for marketing teams, for more than two decades (thom.eu).
It supplies people, not media.
Mechelen · Dutch
Umbau
A B2B agency working in four steps (Think, Create, Grow, Strengthen), the last being coaching and support for in-house marketing teams (contact).
Comparing across markets?
See the UK guide.
11/ method
How this page was checked and what it leaves out
Each agency was re-read on its own website on 28 September 2026: homepage, and the contact or about page for the city.
Nothing comes from Clutch, Sortlist, GoodFirms or any other directory.
What is deliberately absent: a ranking, a price range (no agency here publishes one), and staff counts, results or awards the agencies' current pages do not state.
Rules are summarised from Belgian government guidance and the data-protection authority; not legal advice.
15 minutes · video or phone
Book 15 minutes on Belgium
Tell us what you sell and whether Flanders, Wallonia or Brussels comes first. We come back with the accounts we would start with, what the email rules allow, and whether you need a local bureau at all.
- 0115 minutes, video or phone
- 02Your ICP and first Belgian region
- 03A written next step after the call
- 04Handover, embedded or run-for-you
Pick a day that suits · live availability
12/ questions
B2B marketing in Belgium FAQ
What buyers ask before hiring a B2B marketing agency or B2B communicatiebureau in Belgium.
It depends on region and job.
For brand and content in complex B2B, BBC or Living Stone; for demand generation and ABM, Handlangers or LeadFabric; for HubSpot in Wallonia, Stratenet.
Use the picker.
For the go-to-market plan, see what we do.
Dutch for "B2B communication agency", the Flemish term for an agency that handles B2B brand, content and campaigns.
"B2B marketingbureau" means much the same.
To impersonal company addresses such as info@ or sales@, about products aimed at the company, yes.
To a named address such as firstname.lastname@company.be, only with consent (Infoshopping.be).
Yes.
Belgian guidance treats it as a natural person's address whether used for work or not, so email marketing to it needs consent (Infoshopping.be).
The email rule sits in economic law (the Royal Decree of 4 April 2003) and the FPS Economy publishes guidance on it; the data-protection authority (APD/GBA) covers the GDPR side and publishes direct-marketing recommendations (GBA).
None of the ten agencies here publishes prices.
Ask for a fixed-scope quote for a three-month pilot.
See prices.
BBC, LeadFabric, Handlangers, MakeWaves and The House of Marketing lead in English.
See working in English.
For content, search and events aimed at Flemish SMEs, Dutch; in Wallonia, French.
For senior conversations with large Brussels-based companies, English often works.
Statbel counted 1,187,819 VAT-registered enterprises at 31 December 2024.
Stratenet is listed as a Platinum Solutions Partner in HubSpot's directory; LeadFabric works across Eloqua, Marketo and HubSpot.
Often both: a UK go-to-market partner for the plan, accounts and outreach; a Belgian bureau for Dutch or French content and events.
See the trade-offs.
Our guide to what a go-to-market agency does covers the questions to ask either kind.
The agency now trades as MakeWaves, with offices in Kontich and Merelbeke (MakeWaves).
From the agencies on our previous version of this page, each re-read on its own site on 28 September 2026.
Book 15 minutes · London · Belgium and Europe
Bring your Belgian target list. We’ll show you who to talk to first.
A 15-minute call, a written next step, and a go-to-market system for Belgium, run with you or handed over.
14/ sources
Every source on this page
Each figure above links to one of these. All were opened and checked on 28 September 2026.
- Statbel, Annual evolution of VAT-registered enterprises (Oct 2025)statbel.fgov.be
- EF, English Proficiency Index 2025 (ranking of 123 countries and regions)ef.com
- Infoshopping.be, La publicité par e-mail (FAQ for traders)infoshopping.be
- BBC, Get in touchbbc-agency.eu
- LeadFabric, Homepageleadfabric.com
- ACC Belgiumacc.be
- Royal Decree of 4 April 2003 on email advertising, commentary (g-regs, PDF)g-regs.com
- Gegevensbeschermingsautoriteit, Direct marketinggegevensbeschermingsautoriteit.be
- Gegevensbeschermingsautoriteit, Draft Recommendation 01/2025 on direct marketing (PDF)gegevensbeschermingsautoriteit.be
- EF, EF EPI 2025 report (PDF)ef.at
- HubSpot, Solutions Partner directoryecosystem.hubspot.com
- Stratenet, Homepagestratenet.com
- The House of Marketing, Homepagethom.eu
- Customer Impact, Contactcustomerimpact.be
- D’M&S, Contactdms.be
- handlangers.behandlangers.be
- LeadFabric, Aboutleadfabric.com
- Living Stone, Contactlivingstone.eu
- MakeWaves, Contactmakewaves.be
- makewaves.bemakewaves.be
- HubSpot, STRATENET partner profileecosystem.hubspot.com
- Umbau, Contactumbau.be