Company lists · Data refreshed September 2026
Top 25 Directory of verified marketing agencies based in the United Kingdom
RevenueBase identified 1,165 directory of verified marketing agencies headquartered in the United Kingdom as of September 2026 and tracks 6,153 professional contacts across them, including 1,618 with verified work emails. London is the largest hub.
This list covers directory of verified marketing agencies headquartered in the 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 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.
The 25 largest directory of verified marketing agencies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 103 contacts → | ||||
Indirect evidence “Let’s face it, the world has become an increasingly digital place.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 88 contacts → | ||||
Partial evidence “Founded in 2008, Crafted ignites growth through marketing and digital products.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 79 contacts → | ||||
Indirect evidence “Simple.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 77 contacts → | ||||
Partial evidence “Search Marketing | Content | Strategy Delivered by passionate people.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 66 contacts → | ||||
Indirect evidence “Powered by client ratings, global awards data, and results from The Drum Awards, The Drum Recommends provides comprehensive research to help you make informed, confident decisions…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 58 contacts → | ||||
Indirect evidence “Make is one of the UK's fastest-growing Digital Agencies, with a growing team of 50 - servicing clients including IBM, Asana, Eventbrite, Soldo, Campari, Clearpay, Disney…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 54 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 54 contacts → | ||||
Indirect evidence “At Conscious, we have over 20 years of experience in helping law firms become more successful online.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 51 contacts → | ||||
Indirect evidence “A leading web design and website development company in Belfast, serving clients across Northern Ireland, Ireland, UK and the rest of the world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 49 contacts → | ||||
Indirect evidence “Adapt helps global brands deliver campaigns that convert, by blending data-driven growth strategies with localisation expertise.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 44 contacts → | ||||
Partial evidence “We're Wolfenden, an independent performance marketing agency helping ambitious brands unlock sustainable growth through organic search, authority, digital PR, paid media, data and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 37 contacts → | ||||
Indirect evidence “Car buyers search differently now: AI answers, Google Maps, local search, often before they ever reach a dealer's website.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 36 contacts → | ||||
Partial evidence “We are Xigen, a full-service digital design and marketing agency, specialising in ecommerce.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 35 contacts → | ||||
Partial evidence “Haarty Hanks is a digital marketing agency comprised of tech nerds, creative designers and innovative strategists that plan and execute exceptional brand communications and web…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 33 contacts → | ||||
Partial evidence “Bird UK - bird.co.uk Bird UAE - bird.ae Bird USA - bird.marketing Bird Marketing, an award-winning digital marketing agency, is a beacon of excellence in the digital landscape.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 32 contacts → | ||||
Indirect evidence “Footprint Digital is here to help.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 31 contacts → | ||||
Indirect evidence “At SALT.agency, we work with global brands to deliver growth through pioneering organic search and AI visibility.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 31 contacts → | ||||
Partial evidence “Broadplace Advertising is a digital marketing agency, delivering a range of services and solutions to hundreds of businesses across the globe since 2005.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 30 contacts → | ||||
Strong evidence “Verified Global is a dedicated sports marketing agency helping social media personalities maximize their digital presence, primarily in the US and Europe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 28 contacts → | ||||
Partial evidence “Colewood has been helping businesses with their web & marketing needs Whether it be Paid Search, SEO, Social, Media Production, Website Design, Development and Hosting or Email…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 28 contacts → | ||||
Partial evidence “Extramile Digital is an international digital marketing agency committed to the growth and expansion of your business.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 27 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 27 contacts → | ||||
Partial evidence “Pod’s focus as a digital marketing agency is collaborative working to bring your business the best results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 27 contacts → | ||||
Partial evidence “KAU Media Group is a full service media agency that deliver compelling digital marketing solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 26 contacts → | ||||
Partial evidence “We are an award-winning, Google Premier Partner agency providing a range of high-quality internet marketing services with a strong focus on client ROI and ethical best practice…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: directory of verified marketing 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 directory of verified marketing agencies.
- Partial evidence
- Its own public description names part of directory of verified marketing agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name directory of verified marketing 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 1,165 directory of verified marketing agencies based in the United Kingdom
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,618 reachable decision-makers.
Free signup · no credit card
Directory of verified marketing agencies based in the United Kingdom at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,165 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 directory of verified marketing 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 the United Kingdom whose own description of what they do matches “directory of verified marketing 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 directory of verified marketing 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 directory of verified marketing agencies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 1,618 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 21, 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.
Directory of verified marketing agencies by metro
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 directory of verified marketing 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 directory of verified marketing agencies are there based in the United Kingdom?
RevenueBase identified 1,165 directory of verified marketing agencies headquartered in the 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?
Infoserve, headquartered in Leeds, tops this list with the largest team on record.
Which city has the most directory of verified marketing agencies?
London leads with 336 headquartered companies, followed by Manchester (57) and Birmingham (42).
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 1,618 verified decision-maker contacts tracked across these 1,165 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,165 directory of verified marketing agencies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Directory of verified marketing agencies by geography
- Directory of verified marketing agencies based in Brisbane, Australia
- Directory of verified marketing agencies based in Melbourne, Australia
- Directory of verified marketing agencies based in Sydney, Australia
- Directory of verified marketing agencies based in Curitiba, Brazil
- Directory of verified marketing agencies based in Rio De Janeiro, Brazil
- Directory of verified marketing agencies based in Sao Paulo, Brazil
- Directory of verified marketing agencies based in Calgary, Canada
- Directory of verified marketing agencies based in Edmonton, Canada
- Directory of verified marketing agencies based in Montreal, Canada
- Directory of verified marketing agencies based in Toronto, Canada
- Directory of verified marketing agencies based in Vancouver, Canada
- Directory of verified marketing agencies based in Ahmedabad, India
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Directory of verified marketing agencies based in Brisbane, Australia
- Directory of verified marketing agencies based in Melbourne, Australia
- Directory of verified marketing agencies based in Sydney, Australia
- Directory of verified marketing agencies based in Curitiba, Brazil
- Directory of verified marketing agencies based in Rio De Janeiro, Brazil
- Directory of verified marketing agencies based in Sao Paulo, Brazil