CDN Used by UK B2B Companies: Market Share (2026)
Across 30,973 UK B2B companies with a detectable CDN, Cloudflare leads with 93.9% market share, ahead of Amazon CloudFront at 5.8%.
Among 112,345 trading UK B2B companies, 30,973 have a detectable CDN. Cloudflare is the visible default, with 93.9% (29,089) of those companies, while Amazon CloudFront is the only other system above 1% at 5.8% (1,802).
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The size-band split changes little. Cloudflare accounts for 93.8% of the 20,641 companies with under 10 employees, 94.4% of the 9,080 companies with 10–50 employees, and 92.1% of the 1,252 companies with over 50 employees.
The long tail is thin: Fastly has 0.9% (291), Bunny 0.9% (269), Akamai 0.8% (257), ShortPixel 0.8% (252), Section.io 0.4% (133) and Sirv 0.2% (63). Four further systems cover 32 companies between them.
30,973
B2B with detected CDN
Of 112,345 UK B2B
27.6%
Detection rate
2026
12
Systems detected
In this category
93.9%
Leader share
Cloudflare
UK B2B CDN market share
Share of the 30,973 UK B2B with a detectable system. As of June 2026.
CDN compared
| System | UK B2B | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 29,089 | 93.9% | 6 | 23.3% | Micro B2B, broad default |
| Amazon CloudFront | 1,802 | 5.8% | 6 | 38.2% | London-skewing micro B2B teams |
| Fastly | 291 | 0.9% | 5 | 34.4% | London-skewing micro employers |
| Bunny | 269 | 0.9% | 7 | 9.7% | Small, less London-centred teams |
| Akamai | 257 | 0.8% | 4 | 29.2% | Very small London-skewing teams |
| ShortPixel | 252 | 0.8% | 7 | 19.4% | Small B2B website operators |
| Section.io | 133 | 0.4% | 11 | 36.1% | Small employers, London skew |
| Sirv | 63 | 0.2% | 8 | 11.1% | Small, less London-centred teams |
| Filestack | 52 | 0.2% | 6 | 30.8% | Micro teams, London skew |
| Uploadcare | 38 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| Cloudimage | 30 | 0.1% | — | — | Buy these companies as a spreadsheet → |
| ImageEngine | 10 | 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 CDN system shifts with company size: among UK B2B with under 10 employees, Cloudflare leads at 93.8% of the 20,641 with a detectable system; among UK B2B with 10–50 employees, Cloudflare leads at 94.4% of the 9,080 with a detectable system; and among UK B2B with over 50 employees, Cloudflare leads at 92.1% of the 1,252 with a detectable system.
Under 10 employees
93.8% of band
Under 10 employees is the largest band, with 20,641 companies using a detectable CDN. Cloudflare accounts for 93.8%, leaving a small remainder for Amazon CloudFront and the long-tail systems.
10–50 employees
94.4% of band
10–50 employees contains 9,080 companies and is the most concentrated band, with Cloudflare at 94.4%. Alternative CDNs compete for the remaining 5.6%.
Over 50 employees
92.1% of band
Over 50 employees is smaller, with 1,252 companies, and slightly less concentrated than the other bands. Cloudflare still accounts for 92.1%, with Amazon CloudFront, Fastly and Akamai sitting in the wider competitor set.
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 B2B by CDN
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Frequently asked questions
What is the most-used CDN among UK B2B companies?
How many UK B2B companies have a detectable CDN?
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How is CDN usage detected?
Which has more UK B2B companies, Cloudflare or Amazon CloudFront?
What is the best CDN for UK B2B companies?
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