SEO Used by UK B2B: Market Share (2026)
Market share of 7 SEO systems detected across 38,626 of 112,535 trading UK B2B companies, with Yoast SEO the leader at 78.6%.
Among 112,535 trading UK B2B companies, 38,626 have a detectable SEO system. The market is concentrated: Yoast SEO accounts for 78.6% (30,378), ahead of RankMath SEO at 11.2% (4,324) and All in One SEO at 8.6% (3,332).
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The same pattern holds by headcount. Yoast SEO leads under 10 employees with 79.0% of 25,451 companies, 10–50 employees with 78.2% of 11,589, and over 50 employees with 76.8% of 1,586.
The long tail is narrow but visible. The SEO Framework has 1.4% (543), SEOmatic has 0.9% (352), Google XML Sitemaps has 0.2% (95), and Spotzer has 0.1% (37).
38,626
B2B with detected SEO
Of 112,535 UK B2B
34.3%
Detection rate
2026
7
Systems detected
In this category
78.6%
Leader share
Yoast SEO
UK B2B SEO market share
Share of the 38,626 UK B2B with a detectable system. As of June 2026.
SEO compared
| System | UK B2B | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 30,378 | 78.6% | 6 | 18.2% | Micro-B2B default, median 6 employees |
| RankMath SEO | 4,324 | 11.2% | 7 | 17.2% | Small B2B sites, median 7 employees |
| All in One SEO | 3,332 | 8.6% | 6 | 19.9% | Small B2B sites, median 6 employees |
| The SEO Framework | 543 | 1.4% | 6 | 20.1% | London-tilted micro-B2B, median 6 employees |
| SEOmatic | 352 | 0.9% | 6 | 23.9% | London-skewed micro-B2B, median 6 employees |
| Google XML Sitemaps | 95 | 0.2% | 6 | 10.5% | Non-London micro-B2B, median 6 employees |
| Spotzer | 37 | 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
Under 10 employees
79% of band
Smaller B2B firms dominate the detected SEO market: 25,451 companies sit in this band, and Yoast SEO accounts for 79.0% of them. RankMath SEO, All in One SEO and the smaller tools share the remainder.
10–50 employees
78.2% of band
Mid-sized B2B companies show much the same structure, with Yoast SEO on 78.2% of 11,589 companies. RankMath SEO and All in One SEO remain the main alternatives by share.
Over 50 employees
76.8% of band
Larger employers make up the smallest band here, at 1,586 companies. Yoast SEO still leads with 76.8%, leaving a slightly wider share for other systems than in the under-10 band.
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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