CMS Used by UK Marketing Agency Companies: Market Share (2026)

Updated June 2026

Across 4,686 UK marketing agency companies with a detectable CMS, WordPress accounts for 68.8% of detections, ahead of Squarespace, Wix and Webflow.

Among 56,295 trading UK marketing agency companies, 4,686 have a detectable CMS, with 32 systems in view. WordPress accounts for 68.8% (3,223), ahead of Squarespace at 9.6% (451), Wix at 7.3% (342) and Webflow at 7.1% (334).

Scale does not change the largest system. WordPress has 69.4% of the 3,192 companies under 10 employees, 66.9% of the 1,390 companies with 10–50 employees, and 76.0% of the 104 companies over 50 employees.

The long tail is visible but thin: Craft CMS has 2.1% (100), Sanity 1.2% (57), Drupal 1.2% (56) and Statamic 0.6% (30). A further 24 systems cover 183 companies between them.

4,686

marketing agency with detected CMS

Of 56,295 UK marketing agency

8.3%

Detection rate

2026

Systems detected

In this category

68.8%

Leader share

WordPress

UK Marketing Agency CMS market share

Statamic

Other (24 systems)

Share of the 4,686 UK Marketing Agency with a detectable system. As of June 2026.

CMS compared

System	UK Marketing Agency	Share	Median headcount	London share	Typical profile
WordPress	3,223	68.8%	6	27.3%	Median headcount 6; 68.8% market share
Squarespace	451	9.6%	6	39.7%	Median headcount 6; 9.6% market share
Wix	342	7.3%	6	33%	Median headcount 6; 7.3% market share
Webflow	334	7.1%	7	45.5%	Median headcount 7; 7.1% market share
Craft CMS	100	2.1%	7	35%	Median headcount 7; 2.1% market share
Sanity	57	1.2%	7	52.6%	Median headcount 7; 1.2% market share
Drupal	56	1.2%	6	33.9%	Median headcount 6; 1.2% market share
Statamic	30	0.6%	—	—	View these companies in Firmbase →
Duda	28	0.6%	—	—	View these companies in Firmbase →
Contentful	28	0.6%	—	—	View these companies in Firmbase →
Joomla	25	0.5%	—	—	View these companies in Firmbase →
Storyblok	19	0.4%	—	—	View these companies in Firmbase →
Blogger	19	0.4%	—	—	View these companies in Firmbase →
Umbraco	16	0.3%	—	—	View these companies in Firmbase →
ProcessWire	14	0.3%	—	—	View these companies in Firmbase →
Weebly	14	0.3%	—	—	View these companies in Firmbase →
Prismic	11	0.2%	—	—	View these companies in Firmbase →
DatoCMS	11	0.2%	—	—	View these companies in Firmbase →
ExpressionEngine	8	0.2%	—	—	View these companies in Firmbase →
Concrete CMS	6	0.1%	—	—	View these companies in Firmbase →
It'seeze	6	0.1%	—	—	View these companies in Firmbase →
Ghost	5	0.1%	—	—	View these companies in Firmbase →
October CMS	5	0.1%	—	—	View these companies in Firmbase →
Adobe Experience Manager	4	0.1%	—	—	View these companies in Firmbase →
Silverstripe	4	0.1%	—	—	View these companies in Firmbase →
TYPO3 CMS	4	0.1%	—	—	View these companies in Firmbase →
Business Catalyst	3	0.1%	—	—	View these companies in Firmbase →
Kentico	2	0%	—	—	View these companies in Firmbase →
DNN	2	0%	—	—	View these companies in Firmbase →
Artlogic	2	0%	—	—	View these companies in Firmbase →
Tridion	1	0%	—	—	View these companies in Firmbase →
YourCMS	1	0%	—	—	View these companies in Firmbase →

Systems detected below the page threshold appear with counts only; their full lists are available in the Firmbase app.

Market leader by size

The leading CMS system shifts with company size: among UK Marketing Agency with under 10 employees, WordPress leads at 69.4% of the 3,192 with a detectable system; among UK Marketing Agency with 10–50 employees, WordPress leads at 66.9% of the 1,390 with a detectable system; and among UK Marketing Agency with over 50 employees, WordPress leads at 76% of the 104 with a detectable system.

Under 10 employees

WordPress

69.4% of band

Under 10 employees covers 3,192 marketing agency companies with a detectable CMS, with WordPress at 69.4%. Squarespace and Wix also fit the smaller-agency pattern, each with a median headcount of 6 among profiled users.

10–50 employees

WordPress

66.9% of band

10–50 employees includes 1,390 companies, and WordPress has 66.9%. Webflow, Craft CMS and Sanity sit at median headcounts of 7, so competition outside WordPress tilts slightly towards larger small agencies.

Over 50 employees

WordPress

76% of band

Over 50 employees is a narrow band of 104 companies, with WordPress at 76.0%. The remainder is split across smaller CMS footprints rather than a single clear challenger.

How CMS usage is detected

Methodology

Company data

Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.

Detection

Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling.

Freshness

Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.

Sources

All product names are trademarks of their respective owners. Firmbase is not affiliated with, sponsored by, or endorsed by any trademark owner.

UK Marketing Agency by CMS

Marketing Agency Companies Using WordPress in the UK Marketing Agency Companies Using Squarespace in the UK Marketing Agency Companies Using Wix in the UK Marketing Agency Companies Using Webflow in the UK Marketing Agency Companies Using Craft CMS in the UK Marketing Agency Companies Using Drupal in the UK Marketing Agency Companies Using Sanity in the UK

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Frequently asked questions

What is the most-used CMS among UK marketing agency companies?

WordPress is the most-detected CMS among UK marketing agency companies, with 68.8% share (3,223 of 4,686 companies with a detectable system), ahead of Squarespace (9.6%) and Wix (7.3%).

How many UK marketing agency companies have a detectable CMS?

4,686 of 56,295 actively-trading UK marketing agency companies (8.3%) have a CMS detectable from their public website. The remainder either run systems with no public web footprint or none at all, so detected share figures are a conservative floor.

What is a CMS?

A CMS is software used to create, edit and publish website content without rebuilding pages from scratch. For UK marketing agency companies, it typically supports their own websites and client-facing content operations, including page updates, campaign pages and editorial workflows.

How is CMS usage detected?

Firmbase crawls the public website of every actively-trading company in this scope and fingerprints the technologies present — scripts, widgets, booking and checkout flows. A company is attributed to a system when that system's signatures are found; systems with no public web footprint are not attributable, which is why every share figure on this page means share of companies with a detectable system.

Which has more UK marketing agency companies, WordPress or Squarespace?

WordPress: 3,223 detected companies versus 451 for Squarespace, of the 4,686 UK marketing agency companies with a detectable CMS.

What is the best CMS for UK marketing agency companies?

This directory reports observed CMS usage rather than recommendations. WordPress has the largest share in all three employee bands: 69.4% of 3,192 companies under 10 employees, 66.9% of 1,390 companies with 10–50 employees, and 76.0% of 104 companies over 50 employees.

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