CDN Used by UK Startup Companies: Market Share (2026)
Detected CDN usage across 1,324 of 2,619 trading UK startup companies, with Cloudflare used by 1,140 detected companies (86.1%).
Among 2,619 trading UK startup companies, 1,324 have a detectable CDN. Ten systems appear, but the market is highly concentrated: Cloudflare is present at 1,140 companies, equal to 86.1% of detected CDN usage.
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Amazon CloudFront and Amazon S3 form the main second tier, appearing at 263 companies (19.9%) and 252 companies (19.0%) respectively. Their median detected customer is also a 6-person startup, with London shares of 55.9% and 58.3%.
The long tail is thin. Fastly appears at 18 companies (1.4%), Section.io at 13 (1.0%), Akamai and Bunny at 7 each (0.5%), Uploadcare at 5 (0.4%), and 2 further systems cover 2 companies.
1,324
startup with detected CDN
Of 2,619 UK startup
50.6%
Detection rate
2026
10
Systems detected
In this category
86.1%
Leader share
Cloudflare
UK Startup CDN market share
Share of the 1,324 UK Startup with a detectable system. As of June 2026.
CDN compared
| System | UK Startup | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 1,140 | 86.1% | 6 | 46.8% | Six-person startups, 86.1% share |
| Amazon CloudFront | 263 | 19.9% | 6 | 55.9% | Six-person startups, 19.9% share |
| Amazon S3 | 252 | 19% | 6 | 58.3% | Six-person startups, 19.0% share |
| Fastly | 18 | 1.4% | — | — | View these companies in Firmbase → |
| Section.io | 13 | 1% | — | — | View these companies in Firmbase → |
| Akamai | 7 | 0.5% | — | — | View these companies in Firmbase → |
| Bunny | 7 | 0.5% | — | — | View these companies in Firmbase → |
| Uploadcare | 5 | 0.4% | — | — | View these companies in Firmbase → |
| ShortPixel | 3 | 0.2% | — | — | View these companies in Firmbase → |
| Filestack | 2 | 0.2% | — | — | 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
The leading CDN system shifts with company size: among UK Startup with under 10 employees, Cloudflare leads at 85.9% of the 991 with a detectable system; among UK Startup with 10–50 employees, Cloudflare leads at 86.9% of the 328 with a detectable system; and among UK Startup with over 50 employees, Cloudflare leads at 80% of the 5 with a detectable system.
Under 10 employees
85.9% of band
Most detected CDN usage sits in this band, with 991 companies. Cloudflare leads with 85.9%, while Amazon CloudFront, Amazon S3 and the smaller systems account for the remainder.
10–50 employees
86.9% of band
This band covers 328 companies and looks similar to the smallest startups. Cloudflare leads with 86.9%, leaving Amazon CloudFront and Amazon S3 as the main alternatives.
Over 50 employees
80% of band
Only 5 companies sit in this band, so the split is sensitive to small changes. Cloudflare still leads with 80.0%.
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 Startup by CDN
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Frequently asked questions
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