Company lists · Data refreshed September 2026

Top 25 Marketing and advertising agencies based in Belfast, United Kingdom

Name: Marketing and advertising agencies based in Belfast, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 107 companies tracked

RevenueBase identified 107 marketing and advertising agencies headquartered in Belfast, United Kingdom as of September 2026 and tracks 670 professional contacts across them, including 273 with verified work emails. London is the largest hub.

This list covers marketing and advertising agencies headquartered in Belfast, United Kingdom, 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 5, 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 5, 2026 86% judged on-target in blind review

107Companies

670Contacts tracked

273Verified emails

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The 25 largest marketing and advertising agencies based in Belfast, United Kingdom

Ranked by team size

Top 25 of 107 marketing and advertising agencies based in Belfast, United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names marketing and advertising agencies: 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.
#	Company	Headquarters	Employees	Contacts
1	Rehab AgencyIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	51-200	40
	“We're a digital innovation agency, that leverages emerging technology to create growth opportunities for brands.” Source: company website · checked Sep 5, 2026
2	Genesis BelfastPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	30
	“Genesis is a multi-award winning full service agency, offering advertising, design, public relations, digital and consulting services.” Source: company website · checked Sep 5, 2026
3	Loud Mouth Media LTDPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	27
	“Loud Mouth Media is a multi-award winning performance marketing agency with offices in Belfast, Glasgow, London and Dublin- 2026 Google Premier Partner - PPC Agency of the Year…” Source: company website · checked Sep 5, 2026
4	DHDIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	27
	“DHD is a branding and digital agency based in Belfast, Northern Ireland.” Source: company website · checked Sep 5, 2026
5	WhitenoiseIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	22
	“Welcome to Whitenoise, a creative agency committed to transforming global brands through compelling visual experiences.” Source: company website · checked Sep 5, 2026
6	Pale Blue DOTIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	21
	“We build brands and tech for a connected world.” Source: company website · checked Sep 5, 2026
7	Rapid AgencyIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	19
	“At Rapid, we believe the future belongs to the bold.” Source: company website · checked Sep 5, 2026
8	MXB AgencyPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	18
	“We're an award-winning, full-service marketing agency specialising in brand, strategy, creative and digital.” Source: company website · checked Sep 5, 2026
9	BeingonlineIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	17
	“The service-led digital agency.” Source: company website · checked Sep 5, 2026
10	Digital 24Partial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	14
	“Digital Marketing Done Right.” Source: company website · checked Sep 5, 2026
11	Navigator BlueIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	14
	“We’re an established independent communications business based in Belfast, but working with clients everywhere.” Source: company website · checked Sep 5, 2026
12	ElevatorIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	10
	“We are a solutions-driven creative agency made up of like-minded individuals who share a passion for creating meaningful campaigns and activations.” Source: company website · checked Sep 5, 2026
13	Entrepreneurs UnleashedPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	10
	“Excalibur Press is a multidisciplinary media and marketing company working with large and small corporate clients to help maximise their profile awareness and sales performance…” Source: company website · checked Sep 5, 2026
14	Studio MintPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	10
	“At Studio Mint, we combine creativity with strategy to build brands that engage, create digital experiences that connect, and run marketing campaigns that get results.” Source: company website · checked Sep 5, 2026
15	Vudu DigitalPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	8
	“Vudu Digital (formerly WSI Digital Web) have been providing web design, eCommerce and the full suite of digital marketing services to UK and Irish clients since 2007.” Source: company website · checked Sep 5, 2026
16	FourumIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	7
	“Our Process It’s easy to be a creative agency that makes beautiful things.” Source: company website · checked Sep 5, 2026
17	Impact CommunicationsIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	6
	“We enhance & protect our clients' brands by delivering content and campaigns that create impact and positive results.” Source: company website · checked Sep 5, 2026
18	WEB BureauIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	11-50	6
	“Web design and build” Source: company website · checked Sep 5, 2026
19	MccaddenStrong evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	5
	“McCadden is a marketing and advertising company based out of United Kingdom.” Source: company website · checked Sep 5, 2026
20	GekkoshotPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	5
	“We offer digital marketing services including, web design, brand creation, social media promotion and SEO services.” Source: company website · checked Sep 5, 2026
21	Erudite Digital SolutionsPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	5
	“We are a digital marketing company that helps businesses of all sizes develop online marketing strategies and deliver high quality, regular content.” Source: company website · checked Sep 5, 2026
22	AYIndirect evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	5
	“We are a creative studio delivering meaningful impact through the thoughtful application of business expertise, creative vision and technical excellence.” Source: company website · checked Sep 5, 2026
23	GrowwebPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	4
	“GrowWeb is a multi-award winning digital advertising agency specialising in Search, Display, YouTube and Social advertising.” Source: company website · checked Sep 5, 2026
24	Real Time DigitalPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	4
	“Real Time Digital is a digital marketing agency providing a fully managed service across web, social, search, display and video channels.” Source: company website · checked Sep 5, 2026
25	Stenson WolfPartial evidence	Belfast, United KingdomHQ checked Sep 5, 2026	1-10	4
	“Brand, web and marketing campaigns that clarify who you are & why you matter, so more customers will choose to buy from you.” Source: company website · checked Sep 5, 2026

Showing 25 of 107 marketing and advertising agencies based in Belfast, United Kingdom

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Marketing and advertising agencies based in Belfast, United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 6114 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Belfast, over 107 companies.

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 marketing and advertising agencies, 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 Belfast, United Kingdom whose own description of what they do matches “marketing and advertising agencies”. 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 marketing and advertising agencies, and records with no verified work email. Companies headquartered outside Belfast 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, 273 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 5, 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.

Marketing and advertising agencies by metro in the United Kingdom

Frequently asked

How many marketing and advertising agencies are there based in Belfast, United Kingdom?

RevenueBase identified 107 marketing and advertising agencies headquartered in Belfast, United Kingdom 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?

Rehab Agency, headquartered in Belfast, tops this list with the largest team on record.

Which city has the most marketing and advertising agencies?

London leads with 6114 headquartered companies, followed by Manchester (660) and Birmingham (374).

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 273 verified decision-maker contacts tracked across these 107 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 5, 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.