Most-Used CDN by UK Companies (2026)
Detected CDN market share across 59,766 UK companies, with Cloudflare used by 54,730 of them (91.6%).
Among 2,066,481 trading UK companies, 59,766 have a detectable CDN, spanning 12 systems. Cloudflare accounts for 54,730 of those detections, or 91.6%, while Amazon CloudFront appears in 4,806 companies, or 8.0%.
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Cloudflare leads in every employee band: 92.1% of 39,992 detections under 10 employees, 90.4% of 17,379 detections in the 10–50 band, and 91.4% of 2,395 detections over 50 employees.
The long tail is small. Akamai reaches 710 companies (1.2%), Bunny 483 (0.8%), Fastly 460 (0.8%), ShortPixel 379 (0.6%), Section.io 193 (0.3%) and Sirv 144 (0.2%), with 4 further systems covering 64 companies between them.
59,766
Companies with detected CDN
Of 2,066,481 UK companies
2.9%
Detection rate
2026
12
Systems detected
In this category
91.6%
Leader share
Cloudflare
UK companies CDN market share
Share of the 59,766 UK companies with a detectable system. As of June 2026.
CDN compared
| System | UK companies | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 54,593 | 91.3% | 6 | 22.3% | 6-employee median, broad UK footprint |
| Amazon CloudFront | 4,791 | 8% | 7 | 29.4% | 7-employee median, London-skewed users |
| Akamai | 727 | 1.2% | 5 | 26.9% | 5-employee median, London-leaning users |
| Bunny | 487 | 0.8% | 7 | 10.8% | 7-employee median, non-London users |
| Fastly | 461 | 0.8% | 6 | 33.3% | 6-employee median, London-heavy users |
| ShortPixel | 374 | 0.6% | 7 | 19.3% | 7-employee median, broad UK footprint |
| Section.io | 193 | 0.3% | — | — | Buy these companies as a spreadsheet → |
| Sirv | 144 | 0.2% | — | — | Buy these companies as a spreadsheet → |
| Filestack | 76 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Uploadcare | 74 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| ImageEngine | 68 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Cloudimage | 51 | 0.1% | — | — | 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 CDN system shifts with company size: among UK companies with under 10 employees, Cloudflare leads at 92.1% of the 39,992 with a detectable system; among UK companies with 10–50 employees, Cloudflare leads at 90.4% of the 17,379 with a detectable system; and among UK companies with over 50 employees, Cloudflare leads at 91.4% of the 2,395 with a detectable system.
Under 10 employees
92.1% of band
This band contains 39,992 companies with a detectable CDN, mostly small employers and micro-businesses. Cloudflare leads with 92.1%, leaving limited share for the rest of the field.
10–50 employees
90.4% of band
The 10–50 employee segment contains 17,379 detected companies. Cloudflare remains first with 90.4%, while Amazon CloudFront and the smaller CDN systems make up the remainder.
Over 50 employees
91.4% of band
Larger employers account for 2,395 CDN detections. Cloudflare still leads with 91.4%, so the enterprise-leaning tail does not alter the overall ranking.
How CDN 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 CDN
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Frequently asked questions
What is the most-used CDN among UK companies?
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