Company lists · Data verified August 2026

Top 25 Enterprise SEO agencies based in the United Kingdom

Name: Enterprise SEO 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 3,422 companies tracked

There are 3,422 enterprise SEO agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 19,181 professional contacts across them, including 5,133 with verified work emails and 1,254 with mobile numbers. London is the largest hub.

This list covers enterprise SEO 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.

3,422Companies

19,181Contacts tracked

5,133Verified emails

1,254Mobile numbers

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The 25 largest enterprise SEO agencies based in the United Kingdom

Ranked by team size

Top 25 of 3,422 enterprise SEO 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	Techshu.com	London	201-500	187	17
2	Ics-Digital	Leeds	51-200	165	53
3	Connective3	London	51-200	153	93
4	Infoserve	Leeds	51-200	103	27
5	FOUND	London	51-200	102	61
6	Stickyeyes	Leeds	201-500	78	36
7	MABO	Middlesbrough	51-200	69	42
8	Propellernet	Brighton	51-200	66	48
9	Reboot	London	51-200	59	31
10	SKALE	London	51-200	52	20
11	Profiletree	n/a	51-200	52	14
12	Digitex Technologies	London	51-200	45	1
13	Digitaloft	Kendal	51-200	43	28
14	Unitel Direct LTD	Wilby	51-200	41	1
15	Adbirds	Hub	201-500	39	30
16	PI Datametrics	Brighton	51-200	38	8
17	Stellites Technologies	Brimingham	51-200	35	8
18	NOVOS	London	51-200	33	13
19	OCERE	Cheltenham	51-200	32	6
20	The Digital Maze	Derby	51-200	30	26
21	Webcertain	York	51-200	24	6
22	Activewin Marketing	Manchester	51-200	22	9
23	Chameleon WEB Services	London	51-200	22	5
24	Narwhal Media Group NMG	Bristol	51-200	18	7
25	Reposition Group	London	51-200	11	2

Showing 25 of 3,422 enterprise SEO 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 5,133 reachable decision-makers.

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Enterprise SEO agencies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 911 HQs

1,254Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

2,443

11-50

815

51-200

111

201-500

501-1,000

1,001-5,000

Enterprise SEO agencies by metro

Metro	Companies
Enterprise SEO agencies in London	911
Enterprise SEO agencies in Manchester	146
Enterprise SEO agencies in Birmingham	101
Enterprise SEO agencies in Leeds	68
Enterprise SEO agencies in Glasgow	55
Enterprise SEO agencies in Bristol	48
Enterprise SEO agencies in Nottingham	45

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 “enterprise SEO 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; 0 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 enterprise SEO agencies are there based in the United Kingdom?

There are 3,422 enterprise SEO agencies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Techshu.com, headquartered in London, tops this list with the largest team on record.

Which city has the most enterprise SEO agencies?

London leads with 911 headquartered companies, followed by Manchester (146) and Birmingham (101).

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 5,133 verified decision-maker contacts tracked across these 3,422 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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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.