F
Four
1,833 sites detectedPayment · #2 of 5Updated October 2026
Companies using Four
| # | Company | Industry | Location | First seen | Evidence |
|---|---|---|---|---|---|
| 1 | Professional Services | Colchester, GB | Apr 2026 | signature | |
| 2 | Professional Services | – | Apr 2026 | signature | |
| 3 | Healthcare & Life Sciences | – | Apr 2026 | signature | |
| 4 | Professional Services | – | Apr 2026 | signature | |
| 5 | Education & Learning | – | Apr 2026 | signature | |
| 6 | Hospitality & Travel | – | Apr 2026 | signature | |
| 7 | Hospitality & Travel | – | Apr 2026 | signature | |
| 8 | Media & Content | – | Apr 2026 | signature | |
| 9 | Hospitality & Travel | – | Apr 2026 | signature | |
| 10 | Marketing & Sales Tech | – | Apr 2026 | signature |
See all 1,833 sites detected using Four
Showing 10 of 1,833 sites detected. The customer list has every company, the new customers this month, filters and downloads.
Who uses Four
New customers per week
Companies we saw start using it, from 21 September 2026.
21 SeptThis week, so far
By sector
33% of 96 sampled customers have a known sector.
Hospitality & Travel22%
Marketing & Sales Tech22%
Media & Content19%
Professional Services16%
Healthcare & Life Sciences9%
E-commerce & Retail6%
By country
Country is known for 8% of 96 sampled customers.
ES25%
GB13%
CN13%
US13%
JP13%
DE13%
Also used by these customers
Share of sampled Four customers running each tool.
Payment: share by companies
Four is #2 of 5, with 24% of companies running a tool in this category.
How we found them
Share of sampled customers by where the evidence was.
Website code100%
Every company in the list shows which kind of evidence we found and when. Data quality
Every company using Four
The customer list shows who they are, the evidence for each one and who started this month.