SEO Used by UK IT Services Companies: Market Share (2026)
Across 121,008 trading UK IT services companies, 2,124 have a detectable SEO tool; Yoast SEO leads the detected cohort with 76.4% share.
SEO detection is sparse relative to the size of the UK IT services population: 2,124 of 121,008 trading companies have an identifiable system, with 6 systems detected. Among those detected sites, Yoast SEO accounts for 76.4% (1,623), ahead of RankMath SEO at 13.3% (282) and All in One SEO at 9.1% (194).
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Yoast SEO leads every headcount band, but its share falls with size: 78.3% across 1,367 companies under 10 employees, 73.8% across 702 companies with 10–50 employees, and 63.6% across 55 companies over 50 employees. RankMath SEO and All in One SEO sit as secondary choices within a market concentrated around one system.
The long tail is short: The SEO Framework appears in 1.6% (33), SEOmatic in 1.1% (24), and Google XML Sitemaps in 0.1% (2). Smaller systems are present, but the detected market is mostly accounted for by three systems.
2,131
IT services with detected SEO
Of 121,886 UK IT services
1.7%
Detection rate
2026
7
Systems detected
In this category
76.2%
Leader share
Yoast SEO
UK IT Services SEO market share
Share of the 2,131 UK IT Services with a detectable system. As of June 2026.
SEO compared
| System | UK IT Services | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 1,624 | 76.2% | 6 | 22.8% | Six-employee median, 76.4% share |
| RankMath SEO | 284 | 13.3% | 9 | 19% | Nine-employee median, 13.3% share |
| All in One SEO | 193 | 9.1% | 6 | 25.9% | Six-employee median, 9.1% share |
| The SEO Framework | 33 | 1.5% | — | — | View these companies in Firmbase → |
| SEOmatic | 24 | 1.1% | — | — | View these companies in Firmbase → |
| SEOPlatform.io | 11 | 0.5% | — | — | View these companies in Firmbase → |
| Google XML Sitemaps | 2 | 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 IT Services with under 10 employees, Yoast SEO leads at 78.1% of the 1,370 with a detectable system; among UK IT Services with 10–50 employees, Yoast SEO leads at 73.5% of the 706 with a detectable system; and among UK IT Services with over 50 employees, Yoast SEO leads at 63.6% of the 55 with a detectable system.
Under 10 employees
78.1% of band
This band contains 1,367 companies, with Yoast SEO leading at 78.3%. It is the most concentrated employee band among the three listed.
10–50 employees
73.5% of band
This band contains 702 companies, and Yoast SEO leads with 73.8%. The market is still centred on Yoast SEO, though less so than among under-10 employers.
Over 50 employees
63.6% of band
This band is small at 55 companies, with Yoast SEO leading at 63.6%. Compared with smaller bands, the lower leader share suggests more room for non-Yoast SEO systems among larger IT services firms.
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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