SEO Used by UK Fit-Out Companies: Market Share (2026)
Detected SEO usage across 3,376 of 9,857 trading UK fit-out companies is led by Yoast SEO at 77.9%.
Among 9,857 trading UK fit-out companies, 3,376 have a detectable SEO system. The detected market is concentrated: Yoast SEO accounts for 77.9% (2,631), followed by RankMath SEO at 11.2% (379) and All in One SEO at 9.6% (324).
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The split is consistent across employee bands. Yoast SEO accounts for 77.9% of detected companies with under 10 employees, 77.8% in the 10–50 employee band, and 80.6% among companies with over 50 employees.
The remaining systems form a small tail across 7 detected systems: The SEO Framework has 1.2% (40), Google XML Sitemaps 0.4% (15), SEOmatic 0.4% (12), and Spotzer 0.1% (5).
3,377
fit-out with detected SEO
Of 9,830 UK fit-out
34.4%
Detection rate
2026
8
Systems detected
In this category
77.9%
Leader share
Yoast SEO
UK Fit-Out SEO market share
Share of the 3,377 UK Fit-Out with a detectable system. As of June 2026.
SEO compared
| System | UK Fit-Out | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 2,631 | 77.9% | 5 | 15% | Small fit-out firms, broad usage |
| RankMath SEO | 376 | 11.1% | 5 | 14.4% | Small fit-out firms, secondary share |
| All in One SEO | 325 | 9.6% | 5 | 16.6% | Small fit-out firms, London-skewed |
| The SEO Framework | 39 | 1.2% | — | — | View these companies in Firmbase → |
| Google XML Sitemaps | 15 | 0.4% | — | — | View these companies in Firmbase → |
| SEOmatic | 12 | 0.4% | — | — | View these companies in Firmbase → |
| SEOPlatform.io | 9 | 0.3% | — | — | View these companies in Firmbase → |
| Spotzer | 5 | 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 Fit-Out with under 10 employees, Yoast SEO leads at 77.9% of the 2,493 with a detectable system; among UK Fit-Out with 10–50 employees, Yoast SEO leads at 77.6% of the 822 with a detectable system; and among UK Fit-Out with over 50 employees, Yoast SEO leads at 80.6% of the 62 with a detectable system.
Under 10 employees
77.9% of band
This is the largest detected band, with 2,494 UK fit-out companies. Yoast SEO accounts for 77.9%, while RankMath SEO and All in One SEO form the main alternatives in the wider market.
10–50 employees
77.6% of band
The mid-sized band contains 820 detected companies. Yoast SEO accounts for 77.8%, leaving the rest of the market split mainly between RankMath SEO, All in One SEO and a smaller tail.
Over 50 employees
80.6% of band
The largest-company band is small, with 62 detected companies. Yoast SEO has 80.6% here, slightly above its overall 77.9% share.
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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