WordPress plugins Used by UK Accounting Companies: Market Share (2026)

Updated June 2026

Detected WordPress plugin use across 559 of 35,921 trading UK accounting companies, with Site Kit holding the largest share at 30.1%.

Among 35,921 trading UK accounting companies, 559 have a detectable WordPress plugin. The installed base spans 22 systems, with Site Kit at 30.1% (168), Max Mega Menu at 15.9% (89), Essential Addons for Elementor at 11.6% (65) and Smush at 8.9% (50).

Site Kit is first in every employee band listed: 29.3% among Under 10 employees, 31.2% among 10–50 employees and 40.0% among Over 50 employees. The market is small-practice weighted, with 392 companies in the Under 10 employees band, 157 in 10–50 employees and 10 in Over 50 employees.

The long tail remains sizeable. Jetpack accounts for 7.3% (41), Autoptimize for 5.7% (32), EWWW Image Optimizer for 5.0% (28) and iThemes for 3.9% (22), while 14 further systems cover 94 companies.

559

accounting with detected WordPress plugins

Of 35,921 UK accounting

1.6%

Detection rate

2026

Systems detected

In this category

30.1%

Leader share

Site Kit

UK Accounting WordPress plugins market share

Site Kit

Max Mega Menu

Essential Addons for Elementor

Other (14 systems)

Share of the 559 UK Accounting with a detectable system. As of June 2026.

WordPress plugins compared

System	UK Accounting	Share	Median headcount	London share	Typical profile
Site Kit	168	30.1%	6	16.1%	6-person practices, 16.1% London
Max Mega Menu	89	15.9%	6	29.2%	6-person practices, 29.2% London
Essential Addons for Elementor	65	11.6%	7	41.5%	7-person practices, 41.5% London
Smush	50	8.9%	6	26%	6-person practices, 26.0% London
Jetpack	41	7.3%	—	—	Buy these companies as a spreadsheet →
Autoptimize	32	5.7%	—	—	Buy these companies as a spreadsheet →
EWWW Image Optimizer	28	5%	—	—	Buy these companies as a spreadsheet →
iThemes	22	3.9%	—	—	Buy these companies as a spreadsheet →
Perfmatters	21	3.8%	—	—	Buy these companies as a spreadsheet →
JetEngine	21	3.8%	—	—	Buy these companies as a spreadsheet →
Breadcrumb NavXT	17	3%	—	—	Buy these companies as a spreadsheet →
ContentViews	15	2.7%	—	—	Buy these companies as a spreadsheet →
GoDaddy CoBlocks	13	2.3%	—	—	Buy these companies as a spreadsheet →
GenerateBlocks	12	2.1%	—	—	Buy these companies as a spreadsheet →
a3 Lazy Load	7	1.3%	—	—	Buy these companies as a spreadsheet →
Essential Blocks	7	1.3%	—	—	Buy these companies as a spreadsheet →
Animate It	4	0.7%	—	—	Buy these companies as a spreadsheet →
Flying Pages	4	0.7%	—	—	Buy these companies as a spreadsheet →
Elementor Addon Elements	4	0.7%	—	—	Buy these companies as a spreadsheet →
HT Mega	3	0.5%	—	—	Buy these companies as a spreadsheet →
Shortcodes Ultimate	2	0.4%	—	—	Buy these companies as a spreadsheet →
Advanced Custom Fields	1	0.2%	—	—	Buy these companies as a spreadsheet →

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 WordPress plugins system shifts with company size: among UK Accounting with under 10 employees, Site Kit leads at 29.3% of the 392 with a detectable system; among UK Accounting with 10–50 employees, Site Kit leads at 31.2% of the 157 with a detectable system; and among UK Accounting with over 50 employees, Site Kit leads at 40% of the 10 with a detectable system.

Under 10 employees

Site Kit

29.3% of band

392 companies sit in this band, the largest of the three employee bands; Site Kit has the highest named share at 29.3%. Smaller practices still show a spread across the wider 22-system WordPress plugin market.

10–50 employees

Site Kit

31.2% of band

157 companies sit in the 10–50 employees band, and Site Kit accounts for 31.2%. Max Mega Menu, Essential Addons for Elementor and Smush remain visible across the broader detected base, alongside the 14 further systems covering 94 companies.

Over 50 employees

Site Kit

40% of band

10 companies sit in this band, so the percentage base is narrow. Site Kit still has the highest named share at 40.0%, with other WordPress plugins present across the remaining detectable use.

How WordPress plugins 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 Accounting by WordPress plugins

Accounting Companies Using Site Kit in the UK Accounting Companies Using Max Mega Menu in the UK Accounting Companies Using Essential Addons for Elementor in the UK Accounting Companies Using Smush in the UK

Related directories

Most-Used WordPress plugins by UK Companies (2026)WordPress plugins Used by UK B2B Companies: Market Share (2026)WordPress plugins Used by UK B2C Companies: Market Share (2026)WordPress plugins Used by UK Field Services Companies: Market Share (2026)WordPress plugins Used by UK Construction Companies: Market Share (2026)Accounting in the UK

Frequently asked questions

What is the most-used WordPress plugins among UK accounting companies?

Site Kit is the most-detected WordPress plugins among UK accounting companies, with 30.1% share (168 of 559 companies with a detectable system), ahead of Max Mega Menu (15.9%) and Essential Addons for Elementor (11.6%).

How many UK accounting companies have a detectable WordPress plugins?

559 of 35,921 actively-trading UK accounting companies (1.6%) have a WordPress plugins 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 WordPress plugins?

A WordPress plugin is an add-on used to extend a WordPress website with functions such as site measurement, navigation, layout components, image optimisation, performance tuning or security checks. Among UK accounting companies, 559 of 35,921 trading companies have a detectable WordPress plugin, spread across 22 systems.

How is WordPress plugins 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 accounting companies, Site Kit or Max Mega Menu?

Site Kit: 168 detected companies versus 89 for Max Mega Menu, of the 559 UK accounting companies with a detectable WordPress plugins.

What is the best WordPress plugins for UK accounting companies?

Usage share is reported as a market-share measure, not a recommendation. On the detected base of 559 companies, Site Kit has 30.1% (168), followed by Max Mega Menu at 15.9% (89), Essential Addons for Elementor at 11.6% (65) and Smush at 8.9% (50). Site Kit is first in each employee band: Under 10 employees at 29.3% of 392 companies, 10–50 employees at 31.2% of 157 companies and Over 50 employees at 40.0% of 10 companies.

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