Company lists · Data verified August 2026

Top 25 B2B SEO agencies based in the United Kingdom

Name: B2B 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 1,727 companies tracked

There are 1,727 B2B SEO agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 8,796 professional contacts across them, including 2,433 with verified work emails and 612 with mobile numbers. London is the largest hub.

This list covers B2B 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.

1,727Companies

8,796Contacts tracked

2,433Verified emails

612Mobile numbers

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The 25 largest B2B SEO agencies based in the United Kingdom

Ranked by team size

Top 25 of 1,727 B2B 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	Ics-Digital	Leeds	51-200	165	53
2	Publicis PRO	London	51-200	140	34
3	TBT Marketing	Frome	51-200	138	51
4	BBN	London	1,001-5,000	85	8
5	Delante SEO SEM Agency	London	51-200	75	21
6	Propeller Group	London	51-200	71	50
7	Creative Media	Omagh	51-200	70	27
8	Armstrongb2b	Chester	51-200	67	49
9	Hallam	Nottingham	51-200	66	12
10	Exposure Ninja	Nottingham	51-200	60	32
11	Reboot	London	51-200	59	31
12	Unity Online	Needham Market	51-200	55	40
13	Click Consult Part Of Ceuta Group	London	51-200	55	20
14	Sircles Digital Marketing Agency	Dudley	51-200	53	6
15	The Marketing Practice	London	501-1,000	52	30
16	Stellites Technologies	Brimingham	51-200	35	8
17	OCERE	Cheltenham	51-200	32	6
18	Lion Reach Media	London	51-200	28	9
19	Digitviral	London	51-200	24	2
20	Alan. Agency	London	51-200	22	16
21	Chameleon WEB Services	London	51-200	22	5
22	Pearl Lemon	London	51-200	22	3
23	Adds Corporation	London	51-200	16	1
24	Kingpin Communications	London	51-200	16	1
25	Megantic UK	Manchester	51-200	14	5

Showing 25 of 1,727 B2B 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 2,433 reachable decision-makers.

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B2B SEO agencies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 457 HQs

612Contacts with mobile numbers

23Emails re-verified in last 30 days

Companies by employee count

1-10

1,256

11-50

384

51-200

201-500

501-1,000

1,001-5,000

B2B SEO agencies by metro

Metro	Companies
B2B SEO agencies in London	457
B2B SEO agencies in Manchester	76
B2B SEO agencies in Birmingham	50
B2B SEO agencies in Leeds	32
B2B SEO agencies in Liverpool	26
B2B SEO agencies in Brighton	26
B2B SEO agencies in Glasgow	25

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 “B2B 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; 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 B2B SEO agencies are there based in the United Kingdom?

There are 1,727 B2B SEO agencies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Ics-Digital, headquartered in Leeds, tops this list with the largest team on record.

Which city has the most B2B SEO agencies?

London leads with 457 headquartered companies, followed by Manchester (76) and Birmingham (50).

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 2,433 verified decision-maker contacts tracked across these 1,727 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.