CDN Used by UK B2B: Market Share (2026)
Detected CDN market share across 31,657 of 112,439 trading UK B2B companies, with Cloudflare first at 91.8%.
Among 112,439 trading UK B2B companies, 31,657 have a detectable CDN. Cloudflare accounts for the largest footprint by some distance, appearing at 29,064 companies, or 91.8% of detected CDN usage.
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Amazon S3 and Amazon CloudFront form the next tier, with 2,291 companies (7.2%) and 1,813 companies (5.7%) respectively. Fastly, Akamai and Bunny each sit at 0.9%, covering 293, 271 and 270 companies; ShortPixel follows at 253 companies (0.8%) and Section.io at 133 companies (0.4%).
The long tail is short: 11 systems are detected in total, and 3 further systems cover 13 companies between them. Segment leaders do not change with headcount, although Cloudflare’s share moves from 91.7% under 10 employees to 92.3% at 10–50 employees and 89.3% over 50 employees.
31,657
B2B with detected CDN
Of 112,439 UK B2B
28.2%
Detection rate
2026
11
Systems detected
In this category
91.8%
Leader share
Cloudflare
UK B2B CDN market share
Share of the 31,657 UK B2B with a detectable system. As of June 2026.
CDN compared
| System | UK B2B | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 29,064 | 91.8% | 6 | 23.4% | Small firms, broadest footprint |
| Amazon S3 | 2,291 | 7.2% | 6 | 31.7% | Small firms, London-skewed usage |
| Amazon CloudFront | 1,813 | 5.7% | 6 | 38.4% | Small firms, London-heavy usage |
| Fastly | 293 | 0.9% | 5 | 34.1% | Small firms, niche London skew |
| Akamai | 271 | 0.9% | 5 | 28.8% | Small firms, modest London skew |
| Bunny | 270 | 0.9% | 7 | 10% | Small firms, lower London share |
| ShortPixel | 253 | 0.8% | 7 | 19% | Small firms, low London share |
| Section.io | 133 | 0.4% | 11 | 36.1% | Slightly larger, London-skewed firms |
| Filestack | 52 | 0.2% | 6 | 30.8% | Small firms, London-skewed niche |
| Uploadcare | 37 | 0.1% | — | — | View these companies in Firmbase → |
| ImageEngine | 10 | 0% | — | — | 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
91.7% of band
Under 10 employees is the largest band, with 21,062 companies and Cloudflare present at 91.7%. Other CDN systems compete for a relatively small share of detectable usage in this band.
10–50 employees
92.3% of band
10–50 employees includes 9,306 companies with a detectable CDN, and Cloudflare’s share is 92.3%. The usage pattern is close to the smallest-company band, with the same system holding the largest share.
Over 50 employees
89.3% of band
Over 50 employees is the smallest band at 1,289 companies, and Cloudflare remains first at 89.3%. The lower share leaves a little more room for alternative CDN systems among larger employers.
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 B2B by CDN
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