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

Updated June 2026

Detected WordPress plugin market share across 780 UK marketing agency companies, with Site Kit ahead on 43.2% (337 detections).

WordPress plugin use across UK marketing agencies is concentrated but not closed. Among 780 companies with a detectable WordPress plugin, Site Kit accounts for 43.2% (337), ahead of Jetpack at 10.6% (83) and Smush at 10.4% (81).

The headcount split is tilted towards small agencies: 535 detected companies sit below 10 employees, 229 have 10–50 employees, and 16 have over 50 employees. Site Kit has the largest share in all three bands, at 44.9%, 38.9% and 50.0% respectively.

A long tail remains around specialist add-ons and optimisation tools. Essential Addons for Elementor has 8.1% (63), Max Mega Menu 7.9% (62), JetEngine 5.9% (46), EWWW Image Optimizer 5.3% (41) and Autoptimize 3.8% (30), while 15 further systems cover 84 companies.

780

marketing agency with detected WordPress plugins

Of 56,295 UK marketing agency

1.4%

Detection rate

2026

Systems detected

In this category

43.2%

Leader share

Site Kit

UK Marketing Agency WordPress plugins market share

Site Kit

Jetpack

Smush

Essential Addons for Elementor

Other (15 systems)

Share of the 780 UK Marketing Agency with a detectable system. As of June 2026.

WordPress plugins compared

System	UK Marketing Agency	Share	Median headcount	London share	Typical profile
Site Kit	337	43.2%	6	27.9%	43.2% share, median 6 headcount
Jetpack	83	10.6%	7	30.1%	10.6% share, median 7 headcount
Smush	81	10.4%	5	30.9%	10.4% share, median 5 headcount
Essential Addons for Elementor	63	8.1%	6	34.9%	8.1% share, median 6 headcount
Max Mega Menu	62	7.9%	8	17.7%	7.9% share, median 8 headcount
JetEngine	46	5.9%	—	—	View these companies in Firmbase →
EWWW Image Optimizer	41	5.3%	—	—	View these companies in Firmbase →
Autoptimize	30	3.8%	—	—	View these companies in Firmbase →
Perfmatters	22	2.8%	—	—	View these companies in Firmbase →
Advanced Custom Fields	20	2.6%	—	—	View these companies in Firmbase →
iThemes	11	1.4%	—	—	View these companies in Firmbase →
GoDaddy CoBlocks	11	1.4%	—	—	View these companies in Firmbase →
Animate It	10	1.3%	—	—	View these companies in Firmbase →
Breadcrumb NavXT	8	1%	—	—	View these companies in Firmbase →
ContentViews	7	0.9%	—	—	View these companies in Firmbase →
GenerateBlocks	6	0.8%	—	—	View these companies in Firmbase →
Elementor Addon Elements	6	0.8%	—	—	View these companies in Firmbase →
a3 Lazy Load	4	0.5%	—	—	View these companies in Firmbase →
HT Mega	4	0.5%	—	—	View these companies in Firmbase →
Shortcodes Ultimate	3	0.4%	—	—	View these companies in Firmbase →
Flying Pages	2	0.3%	—	—	View these companies in Firmbase →
Essential Blocks	2	0.3%	—	—	View these companies in Firmbase →
WP Portfolio	2	0.3%	—	—	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 Marketing Agency with under 10 employees, Site Kit leads at 44.9% of the 535 with a detectable system; among UK Marketing Agency with 10–50 employees, Site Kit leads at 38.9% of the 229 with a detectable system; and among UK Marketing Agency with over 50 employees, Site Kit leads at 50% of the 16 with a detectable system.

Under 10 employees

Site Kit

44.9% of band

This is the largest detected band, with 535 companies and Site Kit at 44.9%. The remainder is split across smaller plugin footprints, including Jetpack, Smush, Essential Addons for Elementor and Max Mega Menu in the wider market.

10–50 employees

Site Kit

38.9% of band

Among 229 companies in this band, Site Kit holds 38.9%, below its 43.2% overall detected share. Jetpack, Smush, Essential Addons for Elementor and Max Mega Menu form the visible challenger set across the wider market.

Over 50 employees

Site Kit

50% of band

Only 16 companies sit in this band, so the pattern is more concentrated: Site Kit accounts for 50.0%. The rest of the market is thin at this headcount, with the long tail spread across the 23 detected systems.

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 Marketing Agency by WordPress plugins

Marketing Agency Companies Using Site Kit in the UK Marketing Agency Companies Using Jetpack in the UK Marketing Agency Companies Using Smush in the UK Marketing Agency Companies Using Essential Addons for Elementor in the UK Marketing Agency Companies Using Max Mega Menu 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)CMS Used by UK Marketing Agency Companies: Market Share (2026)WordPress plugins Used by UK Field Services Companies: Market Share (2026)Marketing Agency in the UK

Frequently asked questions

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

Site Kit is the most-detected WordPress plugins among UK marketing agency companies, with 43.2% share (337 of 780 companies with a detectable system), ahead of Jetpack (10.6%) and Smush (10.4%).

How many UK marketing agency companies have a detectable WordPress plugins?

780 of 56,295 actively-trading UK marketing agency companies (1.4%) 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 adds a defined function to a WordPress site, such as measurement, image optimisation, page-building extensions, performance work or navigation. For UK marketing agency companies, these plugins tend to sit inside client-delivery and owned-site workflows: tracking visitors, improving load times, shaping page layouts and managing site features without rebuilding the whole CMS.

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 marketing agency companies, Site Kit or Jetpack?

Site Kit: 337 detected companies versus 83 for Jetpack, of the 780 UK marketing agency companies with a detectable WordPress plugins.

What is the best WordPress plugins for UK marketing agency companies?

This page reports observed usage rather than recommendations, so there is no single best WordPress plugin here. Among the 780 UK marketing agency companies with a detectable WordPress plugin, Site Kit has 43.2% (337) of detected usage; it also has the largest share in Under 10 employees at 44.9% of 535 companies, 10–50 employees at 38.9% of 229 companies, and Over 50 employees at 50.0% of 16 companies. The next largest detected systems are Jetpack at 10.6% (83), Smush at 10.4% (81), Essential Addons for Elementor at 8.1% (63), and Max Mega Menu at 7.9% (62).

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