Company lists · Data refreshed November 2026

Top 21 Website optimization agencies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 2,517 companies tracked

RevenueBase identified 2,517 company matches for website optimization agencies associated with the United Kingdom as of November 2026 and tracks 20,184 professional contacts across them, including 2,580 with verified work emails. London is the largest hub.

This list covers company matches for website optimization agencies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

2,517Companies

20,184Contacts tracked

2,580Verified emails

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The 21 largest website optimization agencies based in the United Kingdom

Ranked by team size

Top 21 of 2,517 company matches for website optimization agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Ics-Digital	Exact match	Leeds, United KingdomHQ recorded Nov 6, 2026	51-200	163 contacts →
	Exact match “ICS-digital is a global SEO, content, advertising, translation & digital PR agency working in over 100 languages, across over 90 markets in the most highly regulated and highly…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Conversion	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	110 contacts →
	Exact match “GAIN Conversion is the world's leading CRO agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Mediavision	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	75 contacts →
	Exact match “At MediaVision, we believe there's potential hidden in every search.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Search4local	Exact match	Exeter, United KingdomHQ recorded Nov 6, 2026	51-200	59 contacts →
	Exact match “Search4Local is a full-service digital advertising and marketing agency based in Exeter, Devon, working with businesses across the UK.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	AYIMA	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	59 contacts →
	Exact match “Based out of the UK and North America, we're a multi-award winning digital search agency who serve some of the world's biggest brands.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Profiletree	Exact match	Belfast, United KingdomHQ recorded Nov 6, 2026	51-200	57 contacts →
	Exact match “ProfileTree is a web design and digital marketing agency based in Belfast, delivering websites, SEO, content, video and AI services to clients across Northern Ireland, Ireland…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Unity Online	Exact match	Needham Market, United KingdomHQ recorded Nov 6, 2026	51-200	56 contacts →
	Exact match “At Unity Online, we exist to help businesses of all shapes and sizes achieve real success online.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Conscious Solutions	Exact match	Bristol, United KingdomHQ recorded Nov 6, 2026	11-50	56 contacts →
	Exact match “At Conscious, we have over 20 years of experience in helping law firms become more successful online.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Wolfenden	Exact match	Leeds, United KingdomHQ recorded Nov 6, 2026	11-50	49 contacts →
	Exact match “We're Wolfenden, an independent performance marketing agency helping ambitious brands unlock sustainable growth through organic search, authority, digital PR, paid media, data and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Sherbet Donkey	Exact match	Bromsgrove, United KingdomHQ recorded Nov 6, 2026	11-50	48 contacts →
	Exact match “Sherbet Donkey is an SEO agency built for businesses that want sustainable, long-term growth from organic search.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Screaming Frog	Exact match	Henley-on-thames, United KingdomHQ recorded Nov 6, 2026	11-50	47 contacts →
	Exact match “Screaming Frog is a search marketing agency drawing on years of experience from within the world of digital marketing.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	I3media	Exact match	Peterborough, United KingdomHQ recorded Nov 6, 2026	11-50	47 contacts →
	Exact match “i3MEDIA is a premium web design and development agency delivering the very best in quality and service.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	KD WEB	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	44 contacts →
	Exact match “KD Web is an award winning internet marketing, web design and creative agency, providing SEO, polished website design, Ecommerce and CMS systems as well as branding and graphic…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Laser RED	Exact match	Grimsby, United KingdomHQ recorded Nov 6, 2026	11-50	40 contacts →
	Exact match “We eat, sleep and breathe digital.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Embarque	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	38 contacts →
	Exact match “We help companies grow with revenue-driven SEO.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	XIGEN	Exact match	Bedford, United KingdomHQ recorded Nov 6, 2026	11-50	37 contacts →
	Exact match “We are Xigen, a full-service digital design and marketing agency, specialising in ecommerce.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	ADZ Creative & Digital Limited	Exact match	Bolton, United KingdomHQ recorded Nov 6, 2026	11-50	37 contacts →
	Exact match “ADZ Creative & Digital are a successful advertising agency and web design company located in Bolton, Greater Manchester.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Atomic Digital Marketing	Exact match	Warrington, United KingdomHQ recorded Nov 6, 2026	11-50	33 contacts →
	Exact match “Atomic is a Digital Marketing Agency based in Cheshire and Hampshire, specialising in PPC, SEO & Web Design.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Atlas SEO	Exact match	Norwich, United KingdomHQ recorded Nov 6, 2026	11-50	33 contacts →
	Exact match “Every business has one thing in common, the drive to succeed.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Fingo Marketing	Exact match	Epsom, United KingdomHQ recorded Nov 6, 2026	11-50	32 contacts →
	Exact match “As specialists in Web Performance, Customer Experience and Technical Development, our digital marketing services ensure that your online strategy delivers results and improvements…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Colewood Digital	Exact match	Stockton-on-tees, United KingdomHQ recorded Nov 6, 2026	11-50	30 contacts →
	Exact match “Founded in Colewood Digital is an omnichannel digital marketing agency offering PPC, SEO, CRO, email marketing, social, web design/development and media production.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “website optimization agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 21 of 2,517 website optimization agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,580 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Website optimization agencies based in the United Kingdom at a glance

As of Nov 6, 2026

12.8%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

24.6%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

1,915

11-50

497

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 2,517 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United Kingdom whose business descriptions match “website optimization agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,580 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Website optimization agencies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “website optimization agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many website optimization agencies are there based in the United Kingdom?

RevenueBase identified 2,517 company matches for website optimization agencies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Ics-Digital tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most website optimization agencies?

London leads with 619 company records, followed by Manchester (99) and Birmingham (64).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,580 professional contacts with verified work emails tracked across these 2,517 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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.