Company lists · Data verified August 2026

Top 23 Contextual advertising agencies based in the United Kingdom

Name: Contextual advertising agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 6,214 companies tracked

There are 6,214 contextual advertising agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 46,836 professional contacts across them, including 10,807 with verified work emails and 3,268 with mobile numbers. London is the largest hub.

This list covers contextual advertising 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. Data current as of August 28, 2026.

6,214Companies

46,836Contacts tracked

10,807Verified emails

3,268Mobile numbers

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The 23 largest contextual advertising agencies based in the United Kingdom

Ranked by team size

Top 23 of 6,214 contextual advertising agencies based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	NP Digital	London	1,001-5,000	862	306
2	Seedtag	London	501-1,000	725	318
3	OGURY	London	501-1,000	591	100
4	Gumgum	London	501-1,000	532	317
5	Loopme	Manchester	201-500	401	237
6	ADD People	Altrincham	201-500	300	174
7	Stratagile	London	201-500	260	9
8	Kinesso Uk&i	London	501-1,000	194	120
9	Techshu.com	London	201-500	187	17
10	Expandi Group	London	201-500	155	46
11	METIA	London	201-500	131	44
12	Admixer	London	201-500	98	15
13	Efficient Frontier	London	201-500	85	2
14	Konica Minolta Marketing Services	London	501-1,000	85	1
15	Stickyeyes	Leeds	201-500	78	36
16	S4 Capital Group	n/a	5,001-10,000	74	27
17	Adbirds	Hub	201-500	39	30
18	Performics UK	n/a	201-500	34	16
19	Institution	Doncaster	201-500	30	2
20	Syzygy London	London	201-500	18	9
21	360 Digi Marketing	London	1,001-5,000	11	1
22	WEB Management Consultants LTD	Manchester	1,001-5,000	11	1
23	Adtrust Media	Douglas	201-500	4	1

Showing 23 of 6,214 contextual advertising agencies based in the United Kingdom

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Contextual advertising agencies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 2107 HQs

3,268Contacts with mobile numbers

23Emails re-verified in last 30 days

Companies by employee count

1-10

4,420

11-50

1,446

51-200

235

201-500

501-1,000

1,001-5,000

5,001-10,000

Contextual advertising agencies by metro

Metro	Companies
Contextual advertising agencies in London	2107
Contextual advertising agencies in Manchester	278
Contextual advertising agencies in Birmingham	164
Contextual advertising agencies in Leeds	117
Contextual advertising agencies in Glasgow	89
Contextual advertising agencies in Bristol	87
Contextual advertising agencies in Liverpool	70

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “contextual advertising agencies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 23 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many contextual advertising agencies are there based in the United Kingdom?

There are 6,214 contextual advertising agencies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

NP Digital, headquartered in London, tops this list with the largest team on record.

Which city has the most contextual advertising agencies?

London leads with 2107 headquartered companies, followed by Manchester (278) and Birmingham (164).

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 10,807 verified decision-maker contacts tracked across these 6,214 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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Related lists

Contextual advertising agencies by geography

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.