Company lists · Data refreshed September 2026
Top 25 Internet marketing consulting firms based in London, United Kingdom
RevenueBase identified 3,422 internet marketing consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 26,118 professional contacts across them, including 3,379 with verified work emails. London is the largest hub.
This list covers internet marketing consulting firms headquartered in London, 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 26, 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 internet marketing consulting firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 457 contacts → | ||||
Indirect evidence “We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 2 | 401 contacts → | ||||
Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 3 | 368 contacts → | ||||
Indirect evidence “Merkle, a dentsu company, powers the experience economy.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 4 | 177 contacts → | ||||
Indirect evidence “Founded in 1991, with offices in Amsterdam, Bath, Dubai and London our award-winning employee-owned company has consistently ranked as one of the UK's leading independent digital…” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 5 | 158 contacts → | ||||
Indirect evidence “IDX (formerly Investis Digital) specializes in elevating companies and brands and maximizing technology to build strong, relatable, and authentic connections with their audiences.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 6 | 117 contacts → | ||||
Partial evidence “e intelligence is a renowned global leader in the digital marketing space.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 7 | 111 contacts → | ||||
Partial evidence “Elevate your business strategy with Webtures, where artificial intelligence shapes our approach to digital strategy consulting.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 8 | 104 contacts → | ||||
Indirect evidence “We're Found, the Everysearch™ agency.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 9 | 96 contacts → | ||||
Partial evidence “Finixio is UK based remote first Marketing & SEO Agency helping clients all over the world.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 10 | 85 contacts → | ||||
Indirect evidence “PMG acquired RocketMill in late 2023.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 11 | 83 contacts → | ||||
Indirect evidence “Powered by our people, our campaigns put your audience first.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 12 | 79 contacts → | ||||
Indirect evidence “Social Boost has helped to grow more than 25 million real Followers, created content for 100+ brands, and generated over 300k sales leads.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 13 | 77 contacts → | ||||
Indirect evidence “At MediaVision, we believe there's potential hidden in every search.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 14 | 76 contacts → | ||||
Indirect evidence “Mind Digital Group is an independent digital company that is focused on servicing global clients and partner agencies.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 15 | 70 contacts → | ||||
Indirect evidence “Starberry is a decentralised global digital agency specialising in brand strategy, web design and lead generation for estate agents, new homes developers and the proptech industry.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 16 | 70 contacts → | ||||
Partial evidence “GA Agency is an award-winning digital marketing agency helping brands all over the world grow their business and revenue in the online space.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 17 | 68 contacts → | ||||
Partial evidence “Vervaunt is a forward-thinking eCommerce consultancy and marketing agency, collaborating with the most ambitious and pioneering brands in the industry across full funnel…” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 18 | 66 contacts → | ||||
Indirect evidence “As a new chapter in our Digital Agency begins, we are also a fantastic place to work, with a reputation for discovering and nurturing some of the finest minds in the business…” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 19 | 65 contacts → | ||||
Partial evidence “Eureka Digital is a multi-award-winning digital marketing agency specializing in healthcare and pharmaceuticals.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 20 | 64 contacts → | ||||
Indirect evidence “We are an award-winning full-service digital agency, part of Jakala group with 1,800 employees across 16 countries around the world.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 21 | 61 contacts → | ||||
Indirect evidence “kai-zn] noun continuous improvement | positive change We’re experts in organic strategy, combining digital PR, technical SEO, content, and social media to put you in front of your…” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 22 | 49 contacts → | ||||
Indirect evidence “The first of a new breed of digital agency designed to operate as a seamless extension of your team, in-house.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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 26, 2026Thanks. The Data Team will review it. | |||||
| 24 | 48 contacts → | ||||
Partial evidence “We're a strategic digital marketing agency specialising in Paid Search, SEO, Google Shopping, Amazon and Social.” Source: RevenueBase Database · checked Sep 26, 2026Thanks. The Data Team will review it. | |||||
| 25 | 48 contacts → | ||||
Indirect evidence “We are a leading independent digital media agency.” Source: RevenueBase Database · checked Sep 26, 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: internet marketing consulting firms. 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 internet marketing consulting firms.
- Partial evidence
- Its own public description names part of internet marketing consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name internet marketing consulting firms. 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 3,422 internet marketing consulting firms based in London, United Kingdom
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Internet marketing consulting firms based in London, United Kingdom at a glance
As of Sep 26, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 3,422 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 internet marketing consulting firms, 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 London, United Kingdom whose own description of what they do matches “internet marketing consulting firms”. 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 internet marketing consulting firms), 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 internet marketing consulting firms, and records with no verified work email. Companies headquartered outside London 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, 3,379 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 26, 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.
Internet marketing consulting firms by metro in the United Kingdom
- Internet marketing consulting firms in London3422
- Internet marketing consulting firms in Manchester433
- Internet marketing consulting firms in Birmingham265
- Internet marketing consulting firms in Leeds205
- Internet marketing consulting firms in Glasgow180
- Internet marketing consulting firms in Bristol142
- Internet marketing consulting firms in Liverpool120
- Internet marketing consulting firms in Nottingham116
- Internet marketing consulting firms in Edinburgh105
- Internet marketing consulting firms in Brighton99
- Internet marketing consulting firms in Sheffield85
- Internet marketing consulting firms in Norwich77
- Internet marketing consulting firms in Bournemouth75
- Internet marketing consulting firms in Cardiff73
- Internet marketing consulting firms in Leicester73
- Internet marketing consulting firms in Newcastle Upon Tyne71
- Internet marketing consulting firms in Belfast60
- Internet marketing consulting firms in Cambridge57
- Internet marketing consulting firms in Milton Keynes56
- Internet marketing consulting firms in Northampton56
- Internet marketing consulting firms in Reading55
- Internet marketing consulting firms in Southampton54
- Internet marketing consulting firms in Exeter48
- Internet marketing consulting firms in Derby44
- Internet marketing consulting firms in Colchester42
- Internet marketing consulting firms in Wolverhampton42
- Internet marketing consulting firms in Peterborough41
- Internet marketing consulting firms in York40
- Internet marketing consulting firms in Cheltenham38
- Internet marketing consulting firms in Poole37
- Internet marketing consulting firms in Preston37
- Internet marketing consulting firms in Oxford35
- Internet marketing consulting firms in Chester33
- Internet marketing consulting firms in Doncaster32
- Internet marketing consulting firms in Plymouth32
- Internet marketing consulting firms in Bradford31
- Internet marketing consulting firms in Coventry31
- Internet marketing consulting firms in Harrogate31
- Internet marketing consulting firms in Warrington30
- Internet marketing consulting firms in Watford29
- Internet marketing consulting firms in Huddersfield27
- Internet marketing consulting firms in Hull27
- Internet marketing consulting firms in Lincoln27
- Internet marketing consulting firms in Worcester27
- Internet marketing consulting firms in Gloucester26
- Internet marketing consulting firms in Chelmsford25
- Internet marketing consulting firms in Hove25
- Internet marketing consulting firms in Swindon25
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 internet marketing consulting firms, 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 internet marketing consulting firms are there based in London, United Kingdom?
RevenueBase identified 3,422 internet marketing consulting firms headquartered in London, 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?
M C Saatchi Performance, headquartered in London, tops this list with the largest team on record.
Which city has the most internet marketing consulting firms?
London leads with 3422 headquartered companies, followed by Manchester (433) and Birmingham (265).
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 3,379 verified decision-maker contacts tracked across these 3,422 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 26, 2026.
Ready to reach these companies? Verified emails and direct dials for all 3,422 internet marketing consulting firms based in London, United Kingdom. Start with a free account, no credit card.
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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 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.
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