Email Used by UK B2C Companies: Market Share (2026)
Detected Email use across 641 UK B2C companies, with Campaign Monitor ahead at 36.2% of identifiable installs.
Around 84,728 trading UK B2C companies are in scope, with 641 showing a detectable Email system. Seven systems appear in the market share view, led by Campaign Monitor at 36.2% (232), followed by follow.it at 20.7% (133) and Constant Contact at 17.2% (110).
Read more
Campaign Monitor is first in every employee band: 36.3% among Under 10 employees, 36.6% among 10–50 employees, and 30.4% among Over 50 employees. The detected market is concentrated in smaller employers, with 391 companies under 10 employees and 227 in the 10–50 band, compared with 23 over 50 employees.
The tail is not especially deep, but it is visible. Creativ.eMail accounts for 11.7% (75), Flodesk for 7.8% (50), while EmailJS and Zoho Campaigns each sit at 3.4% (22).
641
B2C with detected Email
Of 84,728 UK B2C
0.8%
Detection rate
2026
7
Systems detected
In this category
36.2%
Leader share
Campaign Monitor
UK B2C Email market share
Share of the 641 UK B2C with a detectable system. As of June 2026.
Email compared
| System | UK B2C | Share | Median headcount | London share | Typical profile |
|---|---|---|---|---|---|
| Campaign Monitor | 232 | 36.2% | 7 | 15.9% | Small B2C firms, highest share |
| follow.it | 133 | 20.7% | 8 | 16.5% | Small B2C firms, runner-up share |
| Constant Contact | 110 | 17.2% | 6 | 19.1% | Smaller B2C firms, third share |
| Creativ.eMail | 75 | 11.7% | 7 | 25.3% | Small B2C firms, London-skewed |
| Flodesk | 50 | 7.8% | 8 | 10% | Small B2C firms, lower-share usage |
| EmailJS | 22 | 3.4% | — | — | View these companies in Firmbase → |
| Zoho Campaigns | 22 | 3.4% | — | — | 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 Email system shifts with company size: among UK B2C with under 10 employees, Campaign Monitor leads at 36.3% of the 391 with a detectable system; among UK B2C with 10–50 employees, Campaign Monitor leads at 36.6% of the 227 with a detectable system; and among UK B2C with over 50 employees, Campaign Monitor leads at 30.4% of the 23 with a detectable system.
Under 10 employees
36.3% of band
This is the largest detected band, with 391 companies. Campaign Monitor accounts for 36.3%, leaving the remainder split across the other six detected systems.
10–50 employees
36.6% of band
The 10–50 employee band includes 227 companies and looks similar to the smallest-company segment. Campaign Monitor has 36.6%, with the rest of the market spread across smaller shares.
Over 50 employees
30.4% of band
Only 23 detected companies sit above 50 employees, so percentage movements can reflect a small number of firms. Campaign Monitor still ranks first here, with 30.4%.
How Email 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 B2C by Email
Related directories
Frequently asked questions
What is the most-used Email among UK B2C companies?
How many UK B2C companies have a detectable Email?
What is a Email?
How is Email usage detected?
Which has more UK B2C companies, Campaign Monitor or follow.it?
What is the best Email for UK B2C companies?
Search 641 UK companies by the email technology they run.
Find the right decision-makers, see verified company data, and export your list in seconds.