Most-Used Security by UK Companies (2026)
Detected Security usage across 57,776 UK companies, with reCAPTCHA used by 51,446 companies, or 89.0% of detections.
Across 2,038,547 trading UK companies, 57,776 have a detectable Security system. reCAPTCHA accounts for 89.0% of those detections, or 51,446 companies, so this is a highly concentrated market rather than a balanced spread across the 19 systems detected.
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The next tier is much smaller: hCaptcha appears at 2.7% with 1,585 companies, CleanTalk at 2.4% with 1,383, DataDome at 2.4% with 1,362, and Sucuri at 1.6% with 918. Wordfence, WP Guardian and Akamai Bot Manager each sit below 1.5% of detected companies.
reCAPTCHA has the largest share in every employee band: 89.6% among Under 10 employees, 87.7% among 10–50 employees, and 90.0% among Over 50 employees. The long tail remains fragmented, with 11 further systems covering 931 companies between them.
57,776
Companies with detected Security
Of 2,038,547 UK companies
2.8%
Detection rate
2026
19
Systems detected
In this category
89%
Leader share
reCAPTCHA
UK companies Security market share
Share of the 57,776 UK companies with a detectable system. As of June 2026.
Security compared
| System | UK companies | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| reCAPTCHA | 51,446 | 89% | 6 | 16.7% | Small employers, broad usage |
| hCaptcha | 1,585 | 2.7% | 6 | 19.7% | Small employers, London-skewed |
| CleanTalk | 1,383 | 2.4% | 7 | 15.3% | Small sites, slightly higher headcount |
| DataDome | 1,362 | 2.4% | 10 | 18.9% | Mid-small employers, bot management |
| Sucuri | 918 | 1.6% | 6 | 26% | Small employers, London-heavy |
| Wordfence | 815 | 1.4% | 7 | 14.7% | Small employers, site security |
| WP Guardian | 528 | 0.9% | 7 | 6.8% | Small employers, low London share |
| Akamai Bot Manager | 517 | 0.9% | 5 | 28.2% | Small employers, London-heavy |
| Imperva | 458 | 0.8% | 5 | 25.1% | Small employers, London-skewed |
| ClickCease | 246 | 0.4% | — | — | View these companies in Firmbase → |
| Arkose Labs | 135 | 0.2% | — | — | View these companies in Firmbase → |
| Barracuda Networks | 129 | 0.2% | — | — | View these companies in Firmbase → |
| Vanta | 100 | 0.2% | — | — | View these companies in Firmbase → |
| Trustwave | 85 | 0.1% | — | — | View these companies in Firmbase → |
| Kiprotect | 74 | 0.1% | — | — | View these companies in Firmbase → |
| Sectigo TrustLogo | 65 | 0.1% | — | — | View these companies in Firmbase → |
| F5 | 61 | 0.1% | — | — | View these companies in Firmbase → |
| HackerOne | 58 | 0.1% | — | — | View these companies in Firmbase → |
| Drata | 45 | 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
89.6% of band
Under 10 employees is the largest band, with 37,267 companies using a detected Security system. reCAPTCHA accounts for 89.6%, leaving the rest of the market split across smaller CAPTCHA, bot-management and site-security tools.
10–50 employees
87.7% of band
10–50 employees covers 18,110 companies with a detected Security system. reCAPTCHA still has the largest share at 87.7%, while the remaining systems compete for a relatively narrow slice.
Over 50 employees
90% of band
Over 50 employees is a smaller detected cohort at 2,399 companies. reCAPTCHA accounts for 90.0%, so larger employers do not appear to move away from the same default security pattern.
How Security 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 companies by Security
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Frequently asked questions
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