Company lists · Data refreshed September 2026
Top 25 Online advertising agencies based in Leeds, United Kingdom
RevenueBase identified 142 online advertising agencies headquartered in Leeds, United Kingdom as of September 2026 and tracks 1,165 professional contacts across them, including 472 with verified work emails. London is the largest hub.
This list covers online advertising agencies headquartered in Leeds, 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.
The 25 largest online advertising agencies based in Leeds, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 146 | ||||
“We are a specialist performance marketing agency, and we deliver unrivalled performance for our clients on a global scale.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 103 | ||||
“Let’s face it, the world has become an increasingly digital place.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 77 | ||||
“Search Marketing | Content | Strategy Delivered by passionate people.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 64 | ||||
“We’re Engage, the digital agency for those that demand attention.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 44 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 40 | ||||
“We deliver unified strategies across SEO, Content Marketing, Paid Media, Web Development and Web Design, with experts available to consult with directly.#DigitalMarketing #SEO…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 34 | ||||
“Ranked in the top 3% agencies, with Google Premier Partner status, we excel in all areas of digital marketing with a focus on supporting teams to bring their marketing in-house.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 28 | ||||
“Bolser is an award-winning digital agency based in Leeds.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 | ||||
“We create digital experiences.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 25 | ||||
“We're a Leeds based advertising, marketing and design agency with an awesome track record of delivering results over four decades.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 20 | ||||
“Fusion Unlimited is a team of digital performance and growth experts who can drive success for your brand across the marketing mix including SEO/GEO, paid search, social media…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 19 | ||||
“A strategic digital marketing agency tailored for B2B & professional service brands.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 18 | ||||
“Micro2 is a performance-driven VIP digital marketing agency dedicated to delivering elite services to a portfolio of high-end clients.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 | ||||
“Based in Leeds, spike® specialise in paid media and search engine optimisation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 17 | ||||
“Trio Media is an established performance marketing agency based in Leeds, with over 9 years’ experience supporting businesses in increasing online brand visibility and conversions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 14 | ||||
“Creode As a digital marketing agency specialising in meeting the unique demands of today’s financial services sector, our business is built on understanding yours.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 13 | ||||
“What’s Your Brand Ambition?” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 12 | ||||
“Smart marketing is about influencing the metrics that matter most.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 | ||||
“Bobble Digital is the next generation in Digital Marketing Agencies.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 | ||||
“We are a Leeds-based digital marketing agency that plugs into your business as an outsourced marketing partner – an extension of your team.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 | ||||
“At Black Lab, we’re not your run-of-the-mill marketing agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 | ||||
“HotHouse Digital - Simplifying your search for organic growth Our expert team of SEO, content and digital PR specialists are providing businesses with the expertise to succeed -…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | The Digital Dept LTDPartial evidence | 8 | |||
“The Digital Department is a results driven digital marketing company that helps you take that leap of faith into the online world.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 8 | ||||
“Are you a brand that wants to increase their lead generation, increase their brand visibility and be the talk on everybody's lips?” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | MaratopiaIndirect evidence | 8 | |||
“Maratopia Search Marketing agency is committed to delivering increased Google visibility to leading, ambitious and challenger brands, through creative analysis Our approach is…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 142 online advertising agencies based in Leeds, United Kingdom
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Online advertising agencies based in Leeds, United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
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 Leeds, over 142 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 online 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 Leeds, United Kingdom whose own description of what they do matches “online 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 online advertising agencies, and records with no verified work email. Companies headquartered outside Leeds 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, 472 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.
Online advertising agencies by metro in the United Kingdom
- Online advertising agencies in London2404
- Online advertising agencies in Manchester310
- Online advertising agencies in Birmingham201
- Online advertising agencies in Leeds142
- Online advertising agencies in Glasgow124
- Online advertising agencies in Bristol95
- Online advertising agencies in Nottingham88
- Online advertising agencies in Liverpool82
- Online advertising agencies in Edinburgh70
- Online advertising agencies in Brighton58
- Online advertising agencies in Norwich57
- Online advertising agencies in Bournemouth55
- Online advertising agencies in Sheffield53
- Online advertising agencies in Leicester50
- Online advertising agencies in Newcastle Upon Tyne48
- Online advertising agencies in Belfast47
- Online advertising agencies in Cardiff46
- Online advertising agencies in Milton Keynes41
- Online advertising agencies in Southampton40
- Online advertising agencies in Exeter36
- Online advertising agencies in Northampton35
- Online advertising agencies in Wolverhampton34
- Online advertising agencies in Cambridge33
- Online advertising agencies in Reading33
- Online advertising agencies in Preston29
- Online advertising agencies in Cheltenham28
- Online advertising agencies in Peterborough28
- Online advertising agencies in Derby26
Frequently asked
How many online advertising agencies are there based in Leeds, United Kingdom?
RevenueBase identified 142 online advertising agencies headquartered in Leeds, 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?
Connective3, headquartered in Leeds, tops this list with the largest team on record.
Which city has the most online advertising agencies?
London leads with 2404 headquartered companies, followed by Manchester (310) and Birmingham (201).
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 472 verified decision-maker contacts tracked across these 142 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.
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