CMS Used by UK Accounting Companies: Market Share (2026)
Detected CMS market share across 3,062 UK accounting companies, with WordPress used by 75.0% (2,297) of firms with an identifiable CMS.
Among 35,921 trading UK accounting companies, 3,062 have a detectable CMS. WordPress accounts for 75.0% of detected use, with 2,297 companies, while Wix is a distant second at 8.0% and 245 companies.
Read more
The market splits less by size than by degree of concentration. WordPress leads Under 10 employees at 74.1%, 10–50 employees at 77.4%, and Over 50 employees at 79.5%.
Beyond the first six systems, the long tail is thin. Drupal has 0.7% with 21 companies, Craft CMS has 0.6% with 18 companies, and 20 further systems cover 82 companies between them.
3,062
accounting with detected CMS
Of 35,921 UK accounting
8.5%
Detection rate
2026
28
Systems detected
In this category
75%
Leader share
WordPress
UK Accounting CMS market share
CMS compared
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 Accounting with under 10 employees, WordPress leads at 74.1% of the 2,257 with a detectable system; among UK Accounting with 10–50 employees, WordPress leads at 77.4% of the 761 with a detectable system; and among UK Accounting with over 50 employees, WordPress leads at 79.5% of the 44 with a detectable system.
Under 10 employees
74.1% of band
Under 10 employees is the main population, with 2,257 UK accounting companies using a detected CMS. WordPress leads with 74.1%, while the remaining share is spread across smaller website-building and open-source options.
10–50 employees
77.4% of band
10–50 employees contains 761 companies and is still WordPress-led, at 77.4%. This band has enough scale for alternatives to appear, but no second system comes close to the leader.
Over 50 employees
79.5% of band
Over 50 employees is a small group, with 44 companies using a detected CMS. WordPress has 79.5%, so larger accounting firms in this set are even more concentrated around the same system.
How CMS usage is detected
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 Accounting by CMS
Related directories
Frequently asked questions
What is the most-used CMS among UK accounting companies?
How many UK accounting companies have a detectable CMS?
What is a CMS?
How is CMS usage detected?
Which has more UK accounting companies, WordPress or Wix?
What is the best CMS for UK accounting companies?
Buy all 3,062 companies as a spreadsheet.
One Excel/CSV file with company details, websites and key data — yours to download and use.