SEO Used by UK M&E Contracting Companies: Market Share (2026)
Shows detected SEO market share across 1,233 UK M&E contracting companies; Yoast SEO leads with 79.8% of detections (984 companies).
Among 3,360 trading UK M&E contracting companies, 1,233 have a detectable SEO system. The market is concentrated: Yoast SEO accounts for 79.8% (984) of detected usage, with RankMath SEO at 9.7% (119) and All in One SEO at 9.3% (115).
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Yoast SEO leads in each employee band, with 80.1% of the 789 detected companies under 10 employees, 79.5% of the 386 detected companies with 10–50 employees, and 77.6% of the 58 detected companies over 50 employees.
The long tail is small across this market. The SEO Framework appears in 1.5% (19) of detected companies, Google XML Sitemaps in 0.5% (6), SEOmatic in 0.2% (3), and Spotzer in 0.1% (1).
1,242
M&E contracting with detected SEO
Of 3,356 UK M&E contracting
37%
Detection rate
2026
8
Systems detected
In this category
79.8%
Leader share
Yoast SEO
UK M&E Contracting SEO market share
Share of the 1,242 UK M&E Contracting with a detectable system. As of June 2026.
SEO compared
| System | UK M&E Contracting | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 991 | 79.8% | 6 | 12.6% | Small contractors, broad default |
| RankMath SEO | 120 | 9.7% | 7 | 8.3% | Slightly larger small contractors |
| All in One SEO | 114 | 9.2% | 5 | 15.8% | Small contractors, more London-weighted |
| The SEO Framework | 20 | 1.6% | — | — | View these companies in Firmbase → |
| Google XML Sitemaps | 6 | 0.5% | — | — | View these companies in Firmbase → |
| SEOmatic | 3 | 0.2% | — | — | View these companies in Firmbase → |
| SEOPlatform.io | 1 | 0.1% | — | — | View these companies in Firmbase → |
| Spotzer | 1 | 0.1% | — | — | 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 SEO system shifts with company size: among UK M&E Contracting with under 10 employees, Yoast SEO leads at 80.3% of the 793 with a detectable system; among UK M&E Contracting with 10–50 employees, Yoast SEO leads at 79% of the 391 with a detectable system; and among UK M&E Contracting with over 50 employees, Yoast SEO leads at 77.6% of the 58 with a detectable system.
Under 10 employees
80.3% of band
Under 10 employees is the largest detected band, with 789 companies. Yoast SEO leads with 80.1%, while RankMath SEO and All in One SEO account for much of the remaining detected usage.
10–50 employees
79% of band
10–50 employees covers 386 detected companies and still centres on Yoast SEO, which has 79.5% share. Competition remains mostly between RankMath SEO and All in One SEO behind it.
Over 50 employees
77.6% of band
Over 50 employees is a smaller detected group, with 58 companies. Yoast SEO leads with 77.6%, leaving a relatively narrow space for the other detected SEO systems.
How SEO 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.
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UK M&E Contracting by SEO
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Frequently asked questions
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