Most-Used CDN by UK Companies (2026)
Shows detected CDN market share across 61,072 UK companies; Cloudflare is the leader at 89.5%, followed by Amazon CloudFront at 7.9% and Amazon S3 at 7.7%.
CDN use is visible at 61,072 of 2,038,354 trading UK companies, with 11 systems detected. Cloudflare accounts for 89.5% (54,650), ahead of Amazon CloudFront at 7.9% (4,804) and Amazon S3 at 7.7% (4,680).
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Cloudflare is first in every employee-size band: 90.1% of 40,723 companies under 10 employees, 88.2% of 17,873 companies with 10–50 employees, and 88.7% of 2,476 companies over 50 employees.
The long tail is small. Akamai reaches 1.2% (736), Bunny and Fastly each reach 0.8% (486 and 461), ShortPixel reaches 0.6% (377), Section.io reaches 0.3% (193), and 3 further systems cover 25 companies between them.
61,072
Companies with detected CDN
Of 2,038,354 UK companies
3%
Detection rate
2026
11
Systems detected
In this category
89.5%
Leader share
Cloudflare
UK companies CDN market share
Share of the 61,072 UK companies with a detectable system. As of June 2026.
CDN compared
| System | UK companies | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 54,650 | 89.5% | 6 | 22.4% | Sub-10 firms, 89.5% share |
| Amazon CloudFront | 4,804 | 7.9% | 7 | 29.5% | Sub-10 firms, 7.9% share |
| Amazon S3 | 4,680 | 7.7% | 6 | 26.4% | Sub-10 firms, 7.7% share |
| Akamai | 736 | 1.2% | 5 | 26.6% | Sub-10 firms, 1.2% share |
| Bunny | 486 | 0.8% | 7 | 10.7% | Sub-10 firms, 0.8% share |
| Fastly | 461 | 0.8% | 6 | 32.8% | Sub-10 firms, 0.8% share |
| ShortPixel | 377 | 0.6% | 7 | 19.1% | Sub-10 firms, 0.6% share |
| Section.io | 193 | 0.3% | — | — | View these companies in Firmbase → |
| Filestack | 76 | 0.1% | — | — | View these companies in Firmbase → |
| Uploadcare | 72 | 0.1% | — | — | View these companies in Firmbase → |
| ImageEngine | 68 | 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
90.1% of band
Under 10 employees is the largest band, with 40,723 companies and Cloudflare at 90.1%. The rest of the category is split across systems with much smaller overall footprints.
10–50 employees
88.2% of band
10–50 employees contains 17,873 companies, with Cloudflare at 88.2%. Amazon CloudFront and Amazon S3 are the main secondary systems overall, at 7.9% and 7.7% respectively.
Over 50 employees
88.7% of band
Over 50 employees covers 2,476 companies, and Cloudflare still ranks first at 88.7%. The enterprise-leaning tail remains narrow, with Akamai at 1.2% overall and Fastly at 0.8% overall.
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.
All product names are trademarks of their respective owners. Firmbase is not affiliated with, sponsored by, or endorsed by any trademark owner.
UK companies by CDN
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Frequently asked questions
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