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CMS Used by UK Bookkeeping Companies: Market Share (2026)

CMS usage is detected across 2,446 of 16,981 trading UK bookkeeping companies in 2026, with WordPress leading at 74.9% of detected sites.

Among 16,981 trading UK bookkeeping companies, 2,446 have a detectable CMS. WordPress accounts for 74.9% of those detected sites, or 1,833 companies.

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The next group is much smaller: Wix 7.9% (194), Joomla 3.8% (94), Squarespace 3.6% (88), Duda 3.4% (82), Webflow 3.0% (74), It'seeze 0.7% (16) and Drupal 0.6% (14).

WordPress leads across all employee bands: Under 10 employees at 74.6% of 1,832 companies, 10–50 employees at 76.0% of 583, and Over 50 employees at 77.4% of 31. The long tail runs to 26 detected systems in total, with 18 further systems covering 61 companies.

2,446

bookkeeping with detected CMS

Of 16,981 UK bookkeeping

14.4%

Detection rate

2026

26

Systems detected

In this category

74.9%

Leader share

WordPress

UK Bookkeeping CMS market share

WordPress
Wix
Joomla
Squarespace
Duda
Webflow
It'seeze
Drupal
Other (18 systems)

Share of the 2,446 UK Bookkeeping with a detectable system. As of June 2026.

CMS compared

SystemUK BookkeepingShareMedian headcountLondon shareTypical profile
WordPress1,83374.9%622.4%Six-person practices, 22.4% London
Wix1947.9%623.2%Six-person practices, 23.2% London
Joomla943.8%620.2%Six-person practices, 20.2% London
Squarespace883.6%715.9%Seven-person practices, 15.9% London
Duda823.4%622%Six-person practices, 22.0% London
Webflow743%821.6%Eight-person practices, 21.6% London
It'seeze160.7%——View these companies in Firmbase →
Drupal140.6%——View these companies in Firmbase →
Weebly130.5%——View these companies in Firmbase →
Craft CMS120.5%——View these companies in Firmbase →
Statamic70.3%——View these companies in Firmbase →
ExpressionEngine50.2%——View these companies in Firmbase →
Sanity50.2%——View these companies in Firmbase →
Contentful40.2%——View these companies in Firmbase →
October CMS40.2%——View these companies in Firmbase →
Adobe Experience Manager30.1%——View these companies in Firmbase →
YourCMS20.1%——View these companies in Firmbase →
Concrete CMS20.1%——View these companies in Firmbase →
MODX20.1%——View these companies in Firmbase →
Silverstripe10%——View these companies in Firmbase →
Umbraco10%——View these companies in Firmbase →
ProcessWire10%——View these companies in Firmbase →
Ghost10%——View these companies in Firmbase →
DNN10%——View these companies in Firmbase →
Business Catalyst10%——View these companies in Firmbase →
Blogger10%——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 Bookkeeping with under 10 employees, WordPress leads at 74.6% of the 1,832 with a detectable system; among UK Bookkeeping with 10–50 employees, WordPress leads at 76% of the 583 with a detectable system; and among UK Bookkeeping with over 50 employees, WordPress leads at 77.4% of the 31 with a detectable system.

Under 10 employees

WordPress

74.6% of band

At 1,832 companies, this is the largest employee band with a detectable CMS, and WordPress leads at 74.6%. Wix, Joomla, Squarespace, Duda and Webflow form the main named alternatives across the wider bookkeeping market.

10–50 employees

WordPress

76% of band

This band covers 583 companies, with WordPress at 76.0%. Across the full bookkeeping market, the next named systems range from Wix at 7.9% to Webflow at 3.0%.

Over 50 employees

WordPress

77.4% of band

Only 31 companies fall into this band, and WordPress leads at 77.4%. The wider long tail remains fragmented, with 18 further systems covering 61 companies beyond the named CMS group.

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.

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

UK Bookkeeping by CMS

Bookkeeping Companies Using WordPress in the UKBookkeeping Companies Using Wix in the UKBookkeeping Companies Using Squarespace in the UKBookkeeping Companies Using Duda in the UKBookkeeping Companies Using Webflow in the UK

Related directories

Most-Used CMS by UK Companies (2026)CMS Used by UK B2B Companies: Market Share (2026)CMS Used by UK B2C Companies: Market Share (2026)CMS Used by UK Field Services Companies: Market Share (2026)CMS Used by UK Construction Companies: Market Share (2026)Bookkeeping in the UK

Frequently asked questions

What is the most-used CMS among UK bookkeeping companies?
WordPress is the most-detected CMS among UK bookkeeping companies, with 74.9% share (1,833 of 2,446 companies with a detectable system), ahead of Wix (7.9%) and Joomla (3.8%).
How many UK bookkeeping companies have a detectable CMS?
2,446 of 16,981 actively-trading UK bookkeeping companies (14.4%) 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 the system a bookkeeping company uses to publish and manage website content, such as service pages, contact forms, articles and basic landing pages. For UK bookkeeping companies, it supports lead capture, local credibility and routine site changes without rebuilding the whole website.
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 bookkeeping companies, WordPress or Wix?
WordPress: 1,833 detected companies versus 194 for Wix, of the 2,446 UK bookkeeping companies with a detectable CMS.
What is the best CMS for UK bookkeeping companies?
There is no single best CMS here; this page reports detected usage rather than recommendations. WordPress leads overall at 74.9% (1,833 of 2,446 companies), ahead of Wix at 7.9% (194), Joomla at 3.8% (94), Squarespace at 3.6% (88), Duda at 3.4% (82) and Webflow at 3.0% (74). By employee band, WordPress leads Under 10 employees at 74.6% of 1,832 companies, 10–50 employees at 76.0% of 583, and Over 50 employees at 77.4% of 31.

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