SEO Used by UK HVAC Companies: Market Share (2026)
Detected SEO use across 1,219 of 24,155 trading UK HVAC companies, with Yoast SEO holding the largest detected share at 80.0%.
Among 24,155 trading UK HVAC companies, 1,219 have a detectable SEO system. The tracked market is concentrated: Yoast SEO accounts for 80.0% (975), RankMath SEO for 10.0% (122), and All in One SEO for 9.1% (111).
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Yoast SEO leads every headcount band: 80.4% of 820 companies under 10 employees, 79.1% of 359 companies with 10–50 employees, and 80.0% of 40 companies over 50 employees. The pattern looks less like a size-based split and more like a common default across the HVAC cohort.
Seven systems are detected in all. The long tail is small, with The SEO Framework at 1.2% (15), Google XML Sitemaps at 0.3% (4), SEOmatic at 0.2% (2), and Spotzer at 0.2% (2).
1,217
HVAC with detected SEO
Of 24,483 UK HVAC
5%
Detection rate
2026
8
Systems detected
In this category
80%
Leader share
Yoast SEO
UK HVAC SEO market share
Share of the 1,217 UK HVAC with a detectable system. As of June 2026.
SEO compared
| System | UK HVAC | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Yoast SEO | 974 | 80% | 6 | 11.7% | Small HVAC firms, median 6 employees |
| RankMath SEO | 121 | 9.9% | 7 | 7.4% | Small HVAC firms, median 8 employees |
| All in One SEO | 111 | 9.1% | 6 | 14.4% | Small HVAC firms, median 6 employees |
| The SEO Framework | 15 | 1.2% | — | — | View these companies in Firmbase → |
| SEOPlatform.io | 5 | 0.4% | — | — | View these companies in Firmbase → |
| Google XML Sitemaps | 4 | 0.3% | — | — | View these companies in Firmbase → |
| SEOmatic | 2 | 0.2% | — | — | View these companies in Firmbase → |
| Spotzer | 2 | 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 HVAC with under 10 employees, Yoast SEO leads at 80.7% of the 815 with a detectable system; among UK HVAC with 10–50 employees, Yoast SEO leads at 78.5% of the 362 with a detectable system; and among UK HVAC with over 50 employees, Yoast SEO leads at 80% of the 40 with a detectable system.
Under 10 employees
80.7% of band
820 companies sit in this band, making it the largest of the three. Yoast SEO accounts for 80.4%, leaving the remaining systems to compete across a relatively narrow tail.
10–50 employees
78.5% of band
359 companies sit in this band, with Yoast SEO on 79.1%. The share is close to the under-10 band, so mid-sized HVAC firms do not show a separate system pattern.
Over 50 employees
80% of band
40 companies sit in this band, and Yoast SEO still accounts for 80.0%. The small count makes the band thin, but it does not point to a different category leader.
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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