SEO Used by UK Accounting Companies: Market Share (2026)
Detected SEO usage across 1,510 of 35,454 trading UK accounting companies, with Yoast SEO ahead at 78.3% of detections.
Around 35,454 trading UK accounting companies sit in scope, with 1,510 showing a detectable SEO system. Across those detected companies, 7 systems appear.
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Yoast SEO is ahead across the market at 78.3% (1,182), followed by RankMath SEO at 12.0% (181) and All in One SEO at 8.9% (134). The same pattern holds by employee band: Yoast SEO accounts for 77.3% of the Under 10 employees band, 80.4% of the 10–50 employees band, and 86.2% of the Over 50 employees band.
The tail is thin but still visible. The SEO Framework appears at 1.0% (15), SEOmatic at 0.5% (8), Google XML Sitemaps at 0.3% (4), and Spotzer at 0.1% (2).
1,513
accounting with detected SEO
Of 35,921 UK accounting
4.2%
Detection rate
2026
8
Systems detected
In this category
78.5%
Leader share
Yoast SEO
UK Accounting SEO market share
Share of the 1,513 UK Accounting with a detectable system. As of June 2026.
SEO compared
| System | UK Accounting | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 1,187 | 78.5% | 6 | 22.6% | 78.3% share, median 6 employees |
| RankMath SEO | 178 | 11.8% | 7 | 28.1% | 12.0% share, median 7 employees |
| All in One SEO | 135 | 8.9% | 5 | 25.2% | 8.9% share, median 5 employees |
| The SEO Framework | 15 | 1% | — | — | Buy these companies as a spreadsheet → |
| SEOmatic | 8 | 0.5% | — | — | Buy these companies as a spreadsheet → |
| SEOPlatform.io | 4 | 0.3% | — | — | Buy these companies as a spreadsheet → |
| Google XML Sitemaps | 4 | 0.3% | — | — | Buy these companies as a spreadsheet → |
| Spotzer | 2 | 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 Accounting with under 10 employees, Yoast SEO leads at 77.6% of the 1,075 with a detectable system; among UK Accounting with 10–50 employees, Yoast SEO leads at 80.2% of the 409 with a detectable system; and among UK Accounting with over 50 employees, Yoast SEO leads at 86.2% of the 29 with a detectable system.
Under 10 employees
77.6% of band
Small accounting practices make up 1,078 detected companies in this band. Yoast SEO accounts for 77.3%, with the remaining usage spread across smaller alternatives.
10–50 employees
80.2% of band
Mid-sized accounting firms account for 403 detected companies. Yoast SEO has 80.4% here, leaving RankMath SEO, All in One SEO and the tail to compete for the rest.
Over 50 employees
86.2% of band
Larger accounting firms are a much smaller detected group, with 29 companies. Yoast SEO accounts for 86.2%, making alternatives comparatively sparse in this 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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UK Accounting by SEO
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Frequently asked questions
What is the most-used SEO among UK accounting companies?
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