Companies using mxtoolbox in United States
As of 4 November 2026, 618 US companies show mxtoolbox: 609 on their website or in DNS records and 9 in their own job postings, led by New York.
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Top city
- New York · 6
- In both sources
- 0
- Most common size
- 51-200 employees
- Team that names it most
- Marketing & communications · 2 postings
- Top industry, posting companies
- Technology & software
US companies on mxtoolbox
Every company in the country whose own postings name the tool; job boards and portals left out.
Open the sales or marketing leader at each one with a verified e-mail, or get new US mxtoolbox users every Monday.
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By city, company size, industry and team
Footprint tables first (website or DNS), then the companies whose postings name mxtoolbox.
| companies | share | |
|---|---|---|
| New York | 6 | 1% |
| Houston | 5 | 1% |
| Las Vegas | 5 | 1% |
| Angeles City | 4 | 1% |
| Brooklyn | 4 | 1% |
| Dallas | 4 | 1% |
| Fort Lauderdale | 4 | 1% |
| Newport Beach | 4 | 1% |
| Atlanta | 3 | 0% |
| Chicago | 3 | 0% |
| companies | share | |
|---|---|---|
| Self-employed | 236 | 39% |
| 2-10 employees | 197 | 32% |
| 11-50 employees | 136 | 22% |
| 51-200 employees | 31 | 5% |
| 201-500 employees | 6 | 1% |
| 501-1000 employees | 3 | 0% |
| companies | share | |
|---|---|---|
| Beaverton | 1 | 11% |
| Claymont | 1 | 11% |
| Hot Springs | 1 | 11% |
| Miami | 1 | 11% |
| Northbrook | 1 | 11% |
| Torrance | 1 | 11% |
| companies | share | |
|---|---|---|
| 2-10 employees | 2 | 22% |
| 11-50 employees | 1 | 11% |
| 51-200 employees | 3 | 33% |
| 201-500 employees | 2 | 22% |
| 501-1000 employees | 1 | 11% |
| companies | share | |
|---|---|---|
| Technology & software | 6 | 67% |
| Business & finance services | 3 | 33% |
| postings · companies | |
|---|---|
| Marketing & communications | 2 · 1 |
| Customer service & success | 1 · 1 |
mxtoolbox everywhere, and other tools here
All companies using mxtoolbox →
Companies hiring sales in United States →
compared →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
618 US companies show mxtoolbox: 609 carry it on their website or in their DNS records, 9 name it in their own job postings, 0 do both. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/mxtoolbox/united-states)
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 US 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.
mxtoolbox in United States: questions
Is this every US company on mxtoolbox?
It is every US company whose website, DNS records or own job postings show it: 618 in total. Companies that use mxtoolbox without any public trace are not counted.
What does "United States" 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 US list with e-mails?
Sign up, filter companies on mxtoolbox and United States, and open the people you want. Counting is free; the first 1,000 results are too.
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Every US company on mxtoolbox,
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