SEO Used by UK Security Companies: Market Share (2026)
Detected SEO usage across 1,238 UK security companies, with Yoast SEO the largest system at 76.2% of detections.
Among 11,928 trading UK security companies, 1,238 have a detectable SEO system. Seven systems are detected, with Yoast SEO accounting for 76.2% (943) of detected companies, ahead of RankMath SEO on 14.1% (174) and All in One SEO on 9.0% (111).
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Yoast SEO leads across every employee band: 77.9% of 714 companies under 10 employees, 74.4% of 398 companies with 10–50 employees, and 72.2% of 126 companies over 50 employees. RankMath SEO and All in One SEO form the main second tier rather than displacing Yoast SEO in larger security firms.
The long tail is small. SEOmatic accounts for 0.6% (8), The SEO Framework 0.6% (7), Google XML Sitemaps 0.2% (2), and Spotzer 0.1% (1), leaving the detected market concentrated around three SEO systems.
1,244
security with detected SEO
Of 12,111 UK security
10.3%
Detection rate
2026
8
Systems detected
In this category
75.9%
Leader share
Yoast SEO
UK Security SEO market share
Share of the 1,244 UK Security with a detectable system. As of June 2026.
SEO compared
| System | UK Security | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 944 | 75.9% | 7 | 16.4% | Smaller firms, broad adoption |
| RankMath SEO | 178 | 14.3% | 9 | 21.3% | Slightly larger firms, minority share |
| All in One SEO | 110 | 8.8% | 7 | 25.5% | Smaller firms, London-skewed usage |
| SEOmatic | 8 | 0.6% | — | — | Buy these companies as a spreadsheet → |
| The SEO Framework | 7 | 0.6% | — | — | Buy these companies as a spreadsheet → |
| SEOPlatform.io | 3 | 0.2% | — | — | Buy these companies as a spreadsheet → |
| Google XML Sitemaps | 2 | 0.2% | — | — | Buy these companies as a spreadsheet → |
| Spotzer | 1 | 0.1% | — | — | 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 SEO system shifts with company size: among UK Security with under 10 employees, Yoast SEO leads at 77.5% of the 719 with a detectable system; among UK Security with 10–50 employees, Yoast SEO leads at 74.3% of the 400 with a detectable system; and among UK Security with over 50 employees, Yoast SEO leads at 72% of the 125 with a detectable system.
Under 10 employees
77.5% of band
Smaller UK security companies make up 714 detected SEO users, and Yoast SEO leads this band with 77.9% share. RankMath SEO and All in One SEO compete mainly as minority alternatives.
10–50 employees
74.3% of band
The 10–50 employee band contains 398 detected SEO users, with Yoast SEO holding 74.4% share. Competition remains split between RankMath SEO, All in One SEO, and a small tail of other systems.
Over 50 employees
72% of band
Larger security companies account for 126 detected SEO users, and Yoast SEO still leads with 72.2% share. Its share is lower than in the under-10 band, but no other system overtakes it.
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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Frequently asked questions
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