SEO Used by UK PV Installation Companies: Market Share (2026)
Detected SEO market share across 1,664 trading UK PV installation companies: among 656 detections, Yoast SEO accounts for 76.5% of usage.
Among 1,664 trading UK PV installation companies, 656 have a detectable SEO system. Six systems appear in this market, with Yoast SEO accounting for 76.5% of detected companies, or 502 installers.
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RankMath SEO is the second-largest system at 14.3% and 94 companies, followed by All in One SEO at 7.9% and 52 companies. The remainder is thinly spread across The SEO Framework at 1.4% and 9 companies, SEOmatic at 0.5% and 3 companies, and Spotzer at 0.2% and 1 company.
Yoast SEO leads every employee band: 76.0% among 450 companies under 10 employees, 78.7% among 188 companies with 10–50 employees, and 66.7% among 18 companies over 50 employees. Median headcount is low across the profiled systems, at 6 for Yoast SEO, 7 for RankMath SEO, and 5 for All in One SEO.
656
PV installation with detected SEO
Of 1,664 UK PV installation
39.4%
Detection rate
2026
6
Systems detected
In this category
76.5%
Leader share
Yoast SEO
UK PV Installation SEO market share
Share of the 656 UK PV Installation with a detectable system. As of June 2026.
SEO compared
| System | UK PV Installation | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 502 | 76.5% | 6 | 9.2% | Small installers, market default |
| RankMath SEO | 94 | 14.3% | 7 | 7.4% | Small installers, second-choice system |
| All in One SEO | 52 | 7.9% | 5 | 11.5% | Small installers, London-tilted usage |
| The SEO Framework | 9 | 1.4% | — | — | View these companies in Firmbase → |
| SEOmatic | 3 | 0.5% | — | — | View these companies in Firmbase → |
| Spotzer | 1 | 0.2% | — | — | 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 PV Installation with under 10 employees, Yoast SEO leads at 76% of the 450 with a detectable system; among UK PV Installation with 10–50 employees, Yoast SEO leads at 78.7% of the 188 with a detectable system; and among UK PV Installation with over 50 employees, Yoast SEO leads at 66.7% of the 18 with a detectable system.
Under 10 employees
76% of band
This is the largest band, with 450 UK PV installation companies and Yoast SEO on 76.0%. RankMath SEO, All in One SEO and the smaller systems divide the remaining detectable usage.
10–50 employees
78.7% of band
The 10–50 employee band contains 188 companies, and Yoast SEO has its highest band share here at 78.7%. Competition remains concentrated around RankMath SEO and All in One SEO rather than the smaller systems.
Over 50 employees
66.7% of band
Only 18 detected companies sit above 50 employees, so small changes can move share. Yoast SEO still leads with 66.7%, but the band is too small to read as a separate enterprise market.
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 PV Installation by SEO
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Frequently asked questions
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