Best Marketing Agencies in Brussels (2026)

Introduction

Brussels has two marketing markets sharing one city: EU public-affairs consultancies that run advocacy and policy campaigns around the institutions, and Belgian agencies that run performance, search and digital marketing for national brands. The 10 firms below cover both, chosen for the size and depth of their Brussels teams, their client rosters and their current work.

Ownership in the European Quarter shifted over the past two years. Omnicom completed its acquisition of IPG at the end of 2025, and FleishmanHillard and Weber Shandwick now sit under the same owner. WPP merged BCW and Hill & Knowlton to form Burson. The Best in Brussels 2026/27 report, a directory of EU consultancies, lists 71 firms, from 125-consultant offices to small specialists. On the performance side, Belgian shops have added generative engine optimisation (GEO) and AI automation to paid search and analytics.

Every firm here has an active office in the Brussels-Capital Region in 2026. The list is unranked, since the right choice depends on whether your brief is a policy campaign, a lead-generation programme or a brand relaunch in French and Dutch.

The best marketing agencies in Brussels

1. FleishmanHillard

Omnicom · European Quarter · fleishmanhillard.eu

FleishmanHillard has run a Brussels office on Rue Belliard since 1991 and lists more than 125 public affairs consultants there, which makes it one of the largest teams in the city. It is a wholly owned Omnicom subsidiary, led locally by David Turier, and a founding member of EPACA, the European public affairs consultancies’ association. PRovoke Media named it a top agency in the UK and Europe in April 2026.

Clients include Cisco, Pfizer, Unilever, Stripe, L’Oréal, Allianz and Roche. Campaign work runs through grassroots mobilisation, data-led policy communications and FH Studio, its in-house team for content, video, animation and web design.

2. Weber Shandwick

Omnicom · European Quarter · webershandwick.eu

Weber Shandwick’s Brussels office on Avenue de Cortenbergh puts earned media at the core of its approach and builds integrated advocacy and communications campaigns with omnichannel activation across digital, social and traditional media. Its EU team of 17 public affairs consultants covers health, technology and AI, financial services, energy, climate and food.

Clients include Ericsson, Dell Technologies, Logitech, Sanofi, Takeda and the Spanish Blind Organisation (ONCE). Like FleishmanHillard, it is now part of the enlarged Omnicom group.

3. Edelman

Independent, family-owned · Ixelles · edelman.com

Edelman’s Brussels office on Rue du Trône has more than 50 consultants and combines public and government affairs with corporate communications and digital work. It is owned by Daniel J. Edelman Holdings, which keeps the firm family-owned rather than investor-backed. Claudia La Donna is CEO of the Brussels office.

Clients include AB InBev, Amazon, AstraZeneca, Mars, PepsiCo, EFPIA and the World Federation of Advertisers. The office is a good fit for consumer brands whose EU policy exposure and brand reputation need to be handled by one team.

4. APCO

Independent, majority women-owned · European Quarter · apcoworldwide.com

APCO was founded in 1984 and remains independent and majority women-owned. Its Brussels office on Rue Montoyer has around 60 public affairs consultants, led by managing director Carmen Bell, within a global firm of more than 1,200 people.

The firm designs and runs advocacy campaigns, alongside opinion research, crisis communication and digital content. Its Brussels work centres on technology, healthcare, financial services, energy and sustainability. APCO does not name clients in its directory listing and points instead to the EU Transparency Register.

5. Burson

WPP · European Quarter · bursonglobal.com

Burson was formed when WPP merged BCW and Hill & Knowlton, and its Brussels office on Square de Meeûs brings the two former teams together with more than 80 public affairs consultants. Its directory listing names chief executive Andrew Cecil as the client contact.

Its stated strengths run from corporate and public affairs to consumer and brand work, creative and content, and intelligence. That range suits clients who want a policy campaign and a consumer-facing campaign from the same agency.

6. Grayling

Accordience · European Quarter · grayling.com

Grayling’s Brussels team of 14 consultants works from Rue Belliard, comes from 10 European countries and speaks eight languages between them. Grayling is part of Accordience, the international communications group, and Jessica Brobald is managing director in Brussels.

Clients include SC Johnson, Suntory Beverage & Food Europe, Hilton, Kingfisher, Tate & Lyle, Getlink (Eurotunnel) and Roblox. Alongside public affairs, the team runs advocacy and social media campaigns, events and trade association management.

7. Kreab

Founder-owned · European Quarter · kreab.com

Kreab is headquartered in Stockholm and fully owned by its founder and executive chairman. Its Brussels office at Rond-Point Schuman has around 60 public affairs consultants and senior advisers, led by managing partner Tuomas Tierala.

The firm works mainly with financial, digital and manufacturing companies, on monitoring, policy analysis, lobbying and profile-raising strategy. It is the most advisory firm on this list, and a sensible choice when the marketing brief starts with a regulatory question.

8. Clicktrust

Clicktrust Group · Etterbeek · clicktrust.be

Clicktrust is a performance marketing agency headquartered on Cours Saint-Michel in Etterbeek, with a second office in Ghent. Its services cover paid media, creative, tagging and dashboards, plus measurement strategy, generative engine optimisation and AI automation, including a 90-day AI accelerator programme.

Client logos on its site include BNP Paribas Fortis, Belfius Direct, Orange and D’Ieteren, and Brother and Distriplus give testimonials. Its Academy runs public training courses on Google Search Ads, Google Analytics 4 and GEO, which is useful for in-house teams that want to keep some skills internal.

9. Creativeroom

Independent · Evere · creativeroom.be

Creativeroom is an independent agency in Evere that joins brand strategy and identity work to digital marketing: SEO, SEA, social media, influencer and email campaigns, websites and UX.

Recent work includes promotional campaigns for TotalEnergies and Circle K service stations across Belgium and Luxembourg, a 360-degree campaign for Archway at EthCC in Brussels, and a new website, identity and SEO programme for MyBank. It also built the identity and event brand for Fibre Council Europe, a typical Brussels association client.

10. Curryketchup

Independent · Central Brussels · curryketchup.be

Curryketchup is a small Brussels agency on Rue d’Alost that covers digital marketing strategy, creative campaigns, branding, websites, photo and video content, press relations and social media management. It also works on marketing analytics, digital audits and Google Ads.

Clients include the chocolatier Pierre Marcolini, Marie’s Corner, Quartz and Belrobotics. It suits Belgian brands that want one compact team to plan, produce and measure their marketing in French.

What to look for in a Brussels marketing agency

Decide first which kind of campaign you need. EU public-affairs consultancies build campaigns aimed at policymakers, coalitions and the Brussels press, while performance agencies are measured on leads, sales and cost per acquisition. A few firms on this list do both, but most are stronger on one side.

Ask about languages early. Belgian consumer work usually runs in French and Dutch, and EU work in English, often with versions for several member states. Check who writes and checks each language version, and whether translation sits inside the agency or with a supplier.

For public-affairs firms, check the EU Transparency Register. It shows declared clients and spending, and several consultancies point to it in place of a client list. For performance agencies, ask which platforms and measurement tools they are certified on, and how they report after Google’s AI features changed search results in 2025.

Finally, look at how the agency handles the day-to-day: where drafts, position papers, ad creative and reports live, how client feedback is gathered and how approvals are recorded. Campaigns with several language versions and several client stakeholders generate many near-identical files, and a single shared place for the latest version saves a good deal of time.

How Fabric helps marketing agency teams

Fabric gives a marketing agency one workspace for its files, client feedback and team knowledge, with AI search across all of it. The agency setup works well for firms running many accounts at once: one space per client, holding briefs, campaign assets, policy papers and call notes together. There is a fuller picture of this pattern in Fabric for marketing content teams.

Search works by meaning across documents, PDFs, images and connected apps such as Google Drive, Gmail and Notion, so a team can find last year’s consultation response or a Dutch ad variant without remembering the file name. Audio and video transcription makes recorded hearings, webinars and client calls searchable, with clickable timestamps.

For feedback, share a file or folder with the client as a commenter. Shared links work without sign-up. Clients can highlight and comment on PDFs and documents, leave timestamped comments on video and audio, and draw on images or video frames with annotations, and the team marks each comment completed as it is resolved. Finished reports or campaign pages can be published as a web page for view-only access, with password protection and link analytics showing when each named recipient opened them.

On Team plans, self-writing docs keep a page for each client up to date from meetings, Slack and the workspace, covering decisions, deliverables and open items. That helps when an account moves between consultants or when a new member joins mid-campaign.

Password protection and link analytics are included on Pro and Team plans, and self-writing docs on Team plans. See plans for teams.

Frequently asked questions

What is the best marketing agency in Brussels?

It depends on the campaign. For EU policy and advocacy campaigns, FleishmanHillard has the largest team on this list, with more than 125 consultants. For performance marketing aimed at Belgian consumers, Clicktrust and Creativeroom run paid search, SEO and digital campaigns for national brands.

What is the difference between a public affairs consultancy and a marketing agency in Brussels?

Public affairs consultancies run campaigns aimed at EU institutions, governments and coalitions, using policy analysis, media relations and advocacy. Marketing agencies aim at customers and are judged on reach, leads and sales. Several Brussels firms, such as Burson and Edelman, offer both corporate affairs and consumer brand work.

What happened to Hill & Knowlton in Brussels?

WPP merged Hill & Knowlton with BCW to form Burson. The combined Brussels office is on Square de Meeûs and lists more than 80 public affairs consultants.

Do Brussels marketing agencies work in French and Dutch?

Most Belgian agencies work in French, Dutch or both, and EU-facing consultancies work mainly in English. Grayling’s Brussels team, for example, speaks eight languages. Ask who will write each language version before you sign.

Where can I find a Brussels agency for advertising campaigns?

Network advertising agencies such as BBDO, TBWA and Publicis have their own list. See the best advertising agencies in Brussels.

Related lists

Marketing agencies in other cities: Paris · Amsterdam · London · New York · Toronto

More in Brussels: Creative agencies · Advertising agencies · Social media agencies · Branding agencies · Content studios · UX design agencies

Run your agency on Fabric: Fabric for agencies · Review and approval · Best client portal tools