CDN Used by UK Marketing Agency Companies: Market Share (2026)
Detected CDN market share across 2,431 UK marketing agency companies, with Cloudflare used by 94.0% of detected companies.
Among 55,590 trading UK marketing agency companies, 2,431 have a detectable CDN. Cloudflare is the main system in view, used by 2,286 companies, or 94.0% of detected companies.
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Amazon S3 appears in 151 companies, or 6.2%, while Amazon CloudFront appears in 73, or 3.0%. The next tier is small: Fastly is present in 22 companies, Bunny in 18, Section.io in 17, ShortPixel in 15, and Akamai in 6.
Cloudflare has the largest share in every employee band: 94.0% among under-10-employee companies, 94.9% among 10–50-employee companies, and 84.3% among over-50-employee companies. The remaining long tail covers 11 detected systems in total, including 3 further systems covering 3 companies.
2,435
marketing agency with detected CDN
Of 55,833 UK marketing agency
4.4%
Detection rate
2026
11
Systems detected
In this category
94%
Leader share
Cloudflare
UK Marketing Agency CDN market share
Share of the 2,435 UK Marketing Agency with a detectable system. As of June 2026.
CDN compared
| System | UK Marketing Agency | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Cloudflare | 2,289 | 94% | 7 | 32.5% | Small agencies, broad default use |
| Amazon S3 | 151 | 6.2% | 6 | 33.1% | Small agencies, storage-led setups |
| Amazon CloudFront | 72 | 3% | 7 | 30.6% | Small agencies, AWS-adjacent delivery |
| Fastly | 22 | 0.9% | — | — | View these companies in Firmbase → |
| Bunny | 18 | 0.7% | — | — | View these companies in Firmbase → |
| Section.io | 17 | 0.7% | — | — | View these companies in Firmbase → |
| ShortPixel | 15 | 0.6% | — | — | View these companies in Firmbase → |
| Akamai | 6 | 0.2% | — | — | View these companies in Firmbase → |
| Filestack | 6 | 0.2% | — | — | View these companies in Firmbase → |
| Uploadcare | 4 | 0.2% | — | — | View these companies in Firmbase → |
| ImageEngine | 3 | 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
The leading CDN system shifts with company size: among UK Marketing Agency with under 10 employees, Cloudflare leads at 94% of the 1,592 with a detectable system; among UK Marketing Agency with 10–50 employees, Cloudflare leads at 95% of the 773 with a detectable system; and among UK Marketing Agency with over 50 employees, Cloudflare leads at 84.3% of the 70 with a detectable system.
Under 10 employees
94% of band
Under 10 employees is the largest detected band, with 1,589 companies. Cloudflare accounts for 94.0%, leaving Amazon S3, Amazon CloudFront and smaller systems to divide a narrow remainder.
10–50 employees
95% of band
10–50 employees contains 772 companies and is even more concentrated. Cloudflare accounts for 94.9%, so competition sits mainly in secondary or parallel CDN use.
Over 50 employees
84.3% of band
Over 50 employees is a smaller band, with 70 companies, and it is less concentrated than the smaller-company bands. Cloudflare still has the largest share at 84.3%, with more room for Amazon S3, Amazon CloudFront and specialist alternatives.
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 Marketing Agency by CDN
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