Form builders Used by UK construction: Market Share (2026)
Detected form-builder usage across 7,646 UK construction companies, with Contact Form 7 on 67.8% of identifiable installations.
Among 237,527 trading UK construction companies, 7,646 have a detectable form builder. Usage is concentrated: Contact Form 7 accounts for 67.8% (5,182), followed by Gravity Forms at 21.7% (1,659), WPForms at 4.6% (350) and Ninja Forms at 4.4% (335).
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Contact Form 7 is first in every employee band, but its share falls as company size rises. It has 69.3% of the 5,445 companies under 10 employees, 64.8% of the 1,978 companies with 10–50 employees, and 57.4% of the 223 companies over 50 employees.
The long tail is narrow. Jotform has 1.8% (136), 123FormBuilder has 0.8% (64), Cognito Forms has 0.7% (51) and Caldera Forms has 0.3% (25), while 7 further systems cover 52 companies across the 15 systems detected.
7,660
construction with detected Form builders
Of 238,814 UK construction
3.2%
Detection rate
2026
15
Systems detected
In this category
67.8%
Leader share
Contact Form 7
UK construction Form builders market share
Share of the 7,660 UK construction with a detectable system. As of June 2026.
Form builders compared
| System | UK construction | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Contact Form 7 | 5,195 | 67.8% | 5 | 15% | 5-employee micro contractors |
| Gravity Forms | 1,658 | 21.6% | 6 | 11.9% | 6-employee small contractors |
| WPForms | 351 | 4.6% | 5 | 21.4% | 5-employee London-skewed contractors |
| Ninja Forms | 334 | 4.4% | 5 | 14.4% | 5-employee micro contractors |
| Jotform | 136 | 1.8% | 5 | 9.6% | 5-employee regional contractors |
| 123FormBuilder | 64 | 0.8% | 6 | 10.9% | 6-employee small contractors |
| Cognito Forms | 51 | 0.7% | 5 | 5.9% | 5-employee non-London contractors |
| Caldera Forms | 25 | 0.3% | — | — | View these companies in Firmbase → |
| Google Forms | 18 | 0.2% | — | — | View these companies in Firmbase → |
| FormSubmit | 11 | 0.1% | — | — | View these companies in Firmbase → |
| Formstack | 10 | 0.1% | — | — | View these companies in Firmbase → |
| Smartsheet | 10 | 0.1% | — | — | View these companies in Firmbase → |
| Basin | 10 | 0.1% | — | — | View these companies in Firmbase → |
| Paperform | 3 | 0% | — | — | View these companies in Firmbase → |
| Powerful Form | 3 | 0% | — | — | 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
69.3% of band
Construction firms under 10 employees make up 5,445 detected users, with Contact Form 7 accounting for 69.3%. Gravity Forms, WPForms, Ninja Forms and smaller systems compete for the remaining share.
10–50 employees
64.8% of band
The 10–50 employee band contains 1,978 companies, and Contact Form 7 accounts for 64.8%. The rest of the market is split across Gravity Forms, WPForms, Ninja Forms, Jotform and the smaller tools.
Over 50 employees
57.4% of band
The over-50 employee band is smaller, at 223 companies, and Contact Form 7 still accounts for 57.4%. Its lower share in this band leaves more space for Gravity Forms, WPForms, Ninja Forms and the long tail than in the under-10 employee segment.
How Form builders 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.
All product names are trademarks of their respective owners. Firmbase is not affiliated with, sponsored by, or endorsed by any trademark owner.
UK construction by Form builders
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Frequently asked questions
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