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

Updated June 2026

Detected WordPress plugin usage appears across 436 of 16,981 trading UK bookkeeping companies, with Site Kit leading at 28.0% (122 detections).

Around 16,981 UK bookkeeping companies are trading, but only 436 have a detectable WordPress plugin, spread across 22 systems. Site Kit accounts for 28.0% of detected companies (122), followed by Max Mega Menu at 16.1% (70) and Essential Addons for Elementor at 12.4% (54).

Usage is concentrated among small employers. Site Kit leads in every employee band: 27.3% of 319 companies under 10 employees, 28.6% of 112 companies with 10–50 employees, and 60.0% of 5 companies over 50 employees.

The long tail is sizeable. Smush covers 9.4% (41), Jetpack 7.3% (32), Autoptimize 6.2% (27), JetEngine 4.4% (19) and EWWW Image Optimizer 4.4% (19), while 14 further systems account for 77 companies.

436

bookkeeping with detected WordPress plugins

Of 16,981 UK bookkeeping

2.6%

Detection rate

2026

Systems detected

In this category

28%

Leader share

Site Kit

UK Bookkeeping WordPress plugins market share

Site Kit

Max Mega Menu

Essential Addons for Elementor

Other (14 systems)

Share of the 436 UK Bookkeeping with a detectable system. As of June 2026.

WordPress plugins compared

System	UK Bookkeeping	Share	Median headcount	London share	Typical profile
Site Kit	122	28%	6	14.8%	Small teams, broad detected reach
Max Mega Menu	70	16.1%	7	22.9%	Small teams, higher London share
Essential Addons for Elementor	54	12.4%	6	38.9%	Small teams, London-skewed adoption
Smush	41	9.4%	—	—	View these companies in Firmbase →
Jetpack	32	7.3%	—	—	View these companies in Firmbase →
Autoptimize	27	6.2%	—	—	View these companies in Firmbase →
JetEngine	19	4.4%	—	—	View these companies in Firmbase →
EWWW Image Optimizer	19	4.4%	—	—	View these companies in Firmbase →
iThemes	17	3.9%	—	—	View these companies in Firmbase →
Perfmatters	17	3.9%	—	—	View these companies in Firmbase →
Breadcrumb NavXT	16	3.7%	—	—	View these companies in Firmbase →
ContentViews	14	3.2%	—	—	View these companies in Firmbase →
GenerateBlocks	11	2.5%	—	—	View these companies in Firmbase →
GoDaddy CoBlocks	11	2.5%	—	—	View these companies in Firmbase →
Essential Blocks	7	1.6%	—	—	View these companies in Firmbase →
a3 Lazy Load	3	0.7%	—	—	View these companies in Firmbase →
Flying Pages	3	0.7%	—	—	View these companies in Firmbase →
Elementor Addon Elements	3	0.7%	—	—	View these companies in Firmbase →
HT Mega	3	0.7%	—	—	View these companies in Firmbase →
Animate It	3	0.7%	—	—	View these companies in Firmbase →
Shortcodes Ultimate	2	0.5%	—	—	View these companies in Firmbase →
Advanced Custom Fields	1	0.2%	—	—	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 WordPress plugins system shifts with company size: among UK Bookkeeping with under 10 employees, Site Kit leads at 27.3% of the 319 with a detectable system; among UK Bookkeeping with 10–50 employees, Site Kit leads at 28.6% of the 112 with a detectable system; and among UK Bookkeeping with over 50 employees, Site Kit leads at 60% of the 5 with a detectable system.

Under 10 employees

Site Kit

27.3% of band

This is the largest detected band, with 319 companies and a fragmented mix of WordPress plugins. Site Kit leads with 27.3%, while smaller shares sit across menu, page-building and optimisation plugins.

10–50 employees

Site Kit

28.6% of band

The 10–50 employee band includes 112 detected companies. Site Kit remains first with 28.6%, with Max Mega Menu and Essential Addons for Elementor competing in a smaller mid-sized bookkeeping cohort.

Over 50 employees

Site Kit

60% of band

Only 5 detected companies sit above 50 employees, so shares are sensitive to small count changes. Site Kit leads this band with 60.0%.

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 Bookkeeping by WordPress plugins

Bookkeeping Companies Using Site Kit in the UK Bookkeeping Companies Using Max Mega Menu in the UK Bookkeeping Companies Using Essential Addons for Elementor 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)Bookkeeping in the UK

Frequently asked questions

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

Site Kit is the most-detected WordPress plugins among UK bookkeeping companies, with 28% share (122 of 436 companies with a detectable system), ahead of Max Mega Menu (16.1%) and Essential Addons for Elementor (12.4%).

How many UK bookkeeping companies have a detectable WordPress plugins?

436 of 16,981 actively-trading UK bookkeeping companies (2.6%) 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 without replacing the site itself. For UK bookkeeping companies, these plugins tend to support measurement, navigation, page components, image handling and performance rather than the bookkeeping service itself.

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 bookkeeping companies, Site Kit or Max Mega Menu?

Site Kit: 122 detected companies versus 70 for Max Mega Menu, of the 436 UK bookkeeping companies with a detectable WordPress plugins.

What is the best WordPress plugins for UK bookkeeping companies?

This page reports observed usage rather than recommendations, so it does not name a single best WordPress plugin. Site Kit leads every employee band: 27.3% of 319 companies under 10 employees, 28.6% of 112 companies with 10–50 employees, and 60.0% of 5 companies over 50 employees; across all 436 detected companies, it has 28.0% share (122).

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