Most-Used Security by UK Companies (2026)
Across 59,838 UK companies with detectable Security, reCAPTCHA leads with 86.0% detected market share, ahead of Akismet at 5.5%.
Among 2,066,481 trading UK companies, 59,838 have a detectable Security system. The detected market is concentrated: reCAPTCHA accounts for 86.0% (51,439), followed by Akismet at 5.5% (3,306), hCaptcha at 2.7% (1,591), CleanTalk at 2.3% (1,380) and DataDome at 2.3% (1,375).
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The same pattern holds across employee bands. reCAPTCHA leads Under 10 employees with 86.6% of 38,677 companies, 10–50 employees with 84.6% of 18,702 companies, and Over 50 employees with 87.4% of 2,459 companies.
The long tail is visible but fragmented. Beyond the named systems, 12 further systems cover 1,409 companies, while Sucuri, Wordfence and TrustedSite sit between 1.5% and 1.1% of detected use.
59,838
Companies with detected Security
Of 2,066,481 UK companies
2.9%
Detection rate
2026
20
Systems detected
In this category
86%
Leader share
reCAPTCHA
UK companies Security market share
Security compared
| System | UK companies | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| reCAPTCHA | 51,406 | 85.9% | 6 | 16.8% | Small firms, broad default use |
| Akismet | 3,322 | 5.6% | 7 | 17.8% | Small firms, anti-spam sites |
| hCaptcha | 1,585 | 2.6% | 6 | 19.7% | Small firms, London-skewed use |
| CleanTalk | 1,382 | 2.3% | 7 | 15.1% | Small firms, anti-spam layer |
| DataDome | 1,361 | 2.3% | 9 | 19.1% | Slightly larger firms, bot defence |
| Sucuri | 917 | 1.5% | 6 | 26.1% | Small firms, London-heavy sites |
| Wordfence | 818 | 1.4% | 7 | 14.7% | Small firms, site firewall use |
| TrustedSite | 651 | 1.1% | 7 | 19.8% | Small firms, trust-marker use |
| WP Guardian | 529 | 0.9% | 7 | 6.6% | Small firms, outside-London skew |
| Akamai Bot Manager | 508 | 0.8% | 5 | 28.3% | Very small firms, London-skewed |
| Imperva | 454 | 0.8% | 5 | 25.3% | Very small firms, London-skewed |
| Arkose Labs | 133 | 0.2% | — | — | Buy these companies as a spreadsheet → |
| Barracuda Networks | 128 | 0.2% | — | — | Buy these companies as a spreadsheet → |
| Trustwave | 84 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| FingerprintJS | 76 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Kiprotect | 75 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Sectigo TrustLogo | 65 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| HackerOne | 58 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Drata | 45 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Vanta | 1 | 0% | — | — | 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 Security system shifts with company size: among UK companies with under 10 employees, reCAPTCHA leads at 86.6% of the 38,677 with a detectable system; among UK companies with 10–50 employees, reCAPTCHA leads at 84.6% of the 18,702 with a detectable system; and among UK companies with over 50 employees, reCAPTCHA leads at 87.4% of the 2,459 with a detectable system.
Under 10 employees
86.6% of band
Under 10 employees is the largest detected band, with 38,677 companies. reCAPTCHA leads with 86.6%, while smaller-site security and anti-spam systems make up most of the remainder.
10–50 employees
84.6% of band
10–50 employees contains 18,702 detected companies. reCAPTCHA still accounts for 84.6%, with Akismet, hCaptcha, CleanTalk and DataDome competing for smaller shares.
Over 50 employees
87.4% of band
Over 50 employees is smaller at 2,459 detected companies. reCAPTCHA has 87.4%, leaving specialist bot-management and site-security systems to divide a narrow tail.
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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