Warming up
Transactional email API
29,838 marketing agencies across 10 countries publish an email address on their own website. United States holds 63% of them, and the UK ranks 2nd with 5,836.
Companies with a published email address in each of the ten countries we measure for this directory, counted on September 29, 2026.
| United States | 18,819 (63%) |
|---|---|
| United Kingdom | 5,836 (20%) |
| Australia | 1,873 (6%) |
| Canada | 1,381 (5%) |
| Netherlands | 607 (2%) |
| Italy | 392 (1%) |
| Germany | 303 (1%) |
| Ireland | 231 (under 1%) |
| Spain | 229 (under 1%) |
| France | 167 (under 1%) |
Each view breaks the segment down by place, contact route, founding year and the tools their websites run, and ends with an outreach playbook.
Agencies are pitched constantly and spot a template in one line. What works is something they can resell or that makes a client retainer easier to defend: a white-label deliverable, a faster report, a new service line they can price.
The full playbook, with objections and a sample first email, is on each detailed view, starting with marketing agencies in the UK.
Of the ten countries measured, United States has the most, with 18,819, followed by United Kingdom with 5,836. Counted on September 29, 2026 from Warmerly's lead database. Coverage follows where we have crawled most deeply, so it tells you where our data is richest as much as where the industry is biggest.
Companies whose website describes a marketing, creative, digital, branding or advertising agency, or that declare themselves an advertising agency in their structured data. A company is only counted when its own website publishes an email address and it has not asked to be removed.
5,836 with a published email address as of September 29, 2026. 803 of them name London on their website.
Yes. The lead finder covers every country in the database, not only the 10 listed here, 29,838 of these marketing agencies between them. Searching and counting are free; exporting uses your plan's monthly lead allowance.
Pick a country and a city, see how many companies match and what their records hold, then send from mailboxes that are already warmed up.