Companies using duo security in United Kingdom
As of 5 November 2026, 677 British companies show duo security: 677 on their website or in DNS records and 0 in their own job postings, led by London.
As of 5 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Top city
- London · 73
- In both sources
- 0
- Team that names it most
- –
British companies on duo security
No British company names duo security in its job postings yet; the 677 companies in the footprint carry it on their website or in DNS.
Open the sales or marketing leader at each one with a verified e-mail, or get new British duo security users every Monday.
Start free, no card. The first 20 are above; e-mails are verified at the mail server when you open them.
By city, company size, industry and team
Footprint tables first (website or DNS), then the companies whose postings name duo security.
| companies | share | |
|---|---|---|
| London | 73 | 11% |
| Bristol | 10 | 1% |
| Birmingham | 7 | 1% |
| Aberdeen | 6 | 1% |
| Canary Wharf | 5 | 1% |
| Cardiff | 5 | 1% |
| Glasgow | 4 | 1% |
| Harrogate | 4 | 1% |
| New York | 4 | 1% |
| Newcastle upon Tyne | 4 | 1% |
| companies | share | |
|---|---|---|
| Self-employed | 21 | 3% |
| 2-10 employees | 90 | 13% |
| 11-50 employees | 188 | 28% |
| 51-200 employees | 197 | 29% |
| 201-500 employees | 89 | 13% |
| 501-1000 employees | 33 | 5% |
| 1001-5000 employees | 39 | 6% |
| 5001-10000 employees | 9 | 1% |
| 10,001+ employees | 11 | 2% |
| companies | share |
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duo security everywhere, and other tools here
All companies using duo security →
Companies hiring sales in United Kingdom →
compared →
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677 British companies show duo security: 677 carry it on their website or in their DNS records, 0 name it in their own job postings, 0 do both. (Breaknorm, 5 November 2026, https://breaknorm.co/tools/duo-security/united-kingdom)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- Job postingsRead hourly from the applicant tracking systems behind British career sites. A tool counts when the employer's own text names it as the team's system.
- CountryFrom the company's own website: imprint, address, phone prefix and language, with a confidence score. Not the posting's location.
- Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
- ExclusionsJob boards, portals and aggregators are kept out of company lists.
duo security in United Kingdom: questions
Is this every British company on duo security?
It is every British company whose website, DNS records or own job postings show it: 677 in total. Companies that use duo security without any public trace are not counted.
What does "United Kingdom" mean here?
The country of the company, from its own website (imprint, address, phone prefix, language), not where the posting is located. A German company hiring in Paris still counts as German.
How do I get the British list with e-mails?
Sign up, filter companies on duo security and United Kingdom, and open the people you want. Counting is free; the first 1,000 results are too.
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Every British company on duo security,
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