Companies using Mimecast in United States
As of 4 November 2026, 31,574 US companies show Mimecast: 31,541 on their website or in DNS records and 66 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 · 921
- In both sources
- 33
- Most common size
- 1001-5000 employees
- Team that names it most
- IT operations & business systems · 55 postings
- Top industry, posting companies
- Technology & software
US companies on Mimecast
Companies with 51+ employees and high-confidence evidence in their own postings; job boards and portals left out.
Open the sales or marketing leader at each one with a verified e-mail, or get new US Mimecast 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 Mimecast.
| companies | share | |
|---|---|---|
| New York | 921 | 3% |
| Chicago | 358 | 1% |
| Houston | 351 | 1% |
| Boston | 319 | 1% |
| Atlanta | 312 | 1% |
| Dallas | 239 | 1% |
| Washington | 237 | 1% |
| Denver | 182 | 1% |
| Miami | 176 | 1% |
| Austin | 159 | 1% |
| companies | share | |
|---|---|---|
| Self-employed | 1,302 | 4% |
| 2-10 employees | 4,846 | 15% |
| 11-50 employees | 9,690 | 31% |
| 51-200 employees | 8,093 | 26% |
| 201-500 employees | 3,869 | 12% |
| 501-1000 employees | 1,917 | 6% |
| 1001-5000 employees | 1,434 | 5% |
| 5001-10000 employees | 205 | 1% |
| 10,001+ employees | 185 | 1% |
| companies | share | |
|---|---|---|
| New York | 7 | 11% |
| Austin | 2 | 3% |
| Houston | 2 | 3% |
| Alhambra | 1 | 2% |
| América | 1 | 2% |
| Arlington | 1 | 2% |
| Atlanta | 1 | 2% |
| Aurora | 1 | 2% |
| Bellevue | 1 | 2% |
| Boston | 1 | 2% |
| Buffalo | 1 | 2% |
| California | 1 | 2% |
| companies | share | |
|---|---|---|
| 11-50 employees | 3 | 5% |
| 51-200 employees | 12 | 18% |
| 201-500 employees | 16 | 24% |
| 501-1000 employees | 9 | 14% |
| 1001-5000 employees | 21 | 32% |
| 5001-10000 employees | 4 | 6% |
| 10,001+ employees | 1 | 2% |
| companies | share | |
|---|---|---|
| Technology & software | 24 | 36% |
| Business & finance services | 18 | 27% |
| Property & construction | 6 | 9% |
| Commerce & trade | 4 | 6% |
| Consumer services & leisure | 4 | 6% |
| Manufacturing & industry | 4 | 6% |
| Health care | 2 | 3% |
| Transport, logistics & rental | 2 | 3% |
| Media & content | 1 | 2% |
| Utilities & infrastructure | 1 | 2% |
| postings · companies | |
|---|---|
| IT operations & business systems | 55 · 40 |
| Engineering (non-software) | 14 · 4 |
| Sales | 9 · 2 |
| Customer service & success | 4 · 2 |
| Marketing & communications | 2 · 1 |
| Product, program & project management | 2 · 1 |
| Finance & accounting | 1 · 1 |
| Human resources | 1 · 1 |
Mimecast everywhere, and other tools here
All companies using Mimecast →
Companies hiring sales in United States →
email security awareness compared →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
31,574 US companies show Mimecast: 31,541 carry it on their website or in their DNS records, 66 name it in their own job postings, 33 do both. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/mimecast/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.
Mimecast in United States: questions
Is this every US company on Mimecast?
It is every US company whose website, DNS records or own job postings show it: 31,574 in total. Companies that use Mimecast 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 Mimecast and United States, and open the people you want. Counting is free; the first 1,000 results are too.
Get this list your way
The same data as a search, over MCP and the API, as bulk files, or pushed to you as it changes.
Every US company on Mimecast,
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