Tools ·

Companies using fastmail_

As of 4 November 2026, 51,894 companies carry fastmail on their website or in their DNS records; none names it in job postings yet.

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

Largest market
United States · 22,635 companies
Companies with 51+ staff
2,530 · 5% of the footprint
Top industry
Technology & software · 20%
Team that names it most
–
Hiring on it, last 30 days
0 companies
Most often alongside
–
51,894companies show fastmail, all sources
51,894on their website or in DNS records
0name it in their own job postings
0postings naming fastmail, last 90 days
02 — Two ways we see a tool

Where fastmail shows up

Each population is counted on its own. We never add them up without saying so, because they answer different questions.

Website and DNS footprint51,894

Companies whose own pages load fastmail's scripts or embeds, or whose domain's mail and hosting records (SPF, DKIM, MX, CNAME) point at fastmail. From our crawl of 41.5M company websites and the DNS sweep behind it. Reach: the tool is in the building.

Job postings0

Companies whose own postings say the team works in fastmail. Read hourly from ~70 applicant tracking systems, with the function, a quote and a date. Intent: the team that runs it is hiring.

Both0

Companies in the footprint whose postings also name fastmail. The rest of the posting population (0) runs fastmail without a public trace on the site or in DNS, which is where job data earns its place.

03 — Who uses it

Companies on fastmail

No company names fastmail in its job postings with enough confidence to list yet; the companies below carry it on their website or in DNS.

Seen through the website or DNS only

Companies with 1,000+ employees whose website or DNS carries fastmail but whose postings never name it: the part of the market job data alone misses.

51,894 companies show fastmail; 359 of them have over 1,000 employees.

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04 — Footprint breakdown

By country, company size and industry

The 51,894 companies with fastmail on their website or in DNS. Click a country for its own page where we have one.

By country
companiesshare
United States
22,63544%
Netherlands
8,12416%
United Kingdom
4,5439%
Australia
1,9624%
Germany
1,4023%
Canada
1,2102%
Belgium
1,0452%
France
5281%
Spain
5101%
Sweden
4131%
Switzerland
2911%
Brazil
2871%
By company size
companiesshare
Self-employed
28,69755%
2-10 employees
10,64621%
11-50 employees
4,8239%
51-200 employees
1,3953%
201-500 employees
5131%
501-1000 employees
2380%
1001-5000 employees
2761%
5001-10000 employees
500%
10,001+ employees
580%
By industry
companiesshare
Technology & software
10,45220%
Media & content
9,20918%
Business & finance services
7,75815%
Consumer services & leisure
6,40912%
Commerce & trade
2,4805%
Property & construction
2,2634%
Manufacturing & industry
1,9864%
Public, community & associations
1,9194%
Health care
1,8013%
Hospitality & travel
8582%
Automotive
4931%
Transport, logistics & rental
4531%
05 — What their DNS and pages also say

The mail, hosting and web stack of fastmail companies

Other tools found on the same companies' websites or in their DNS records. Mail providers and senders come from SPF, DKIM and MX; the rest from page code.

Cloudflare16,698 companies · 32%
Microsoft 3659,357 companies · 18%
flowmailer5,188 companies · 10%
Google Workspace3,859 companies · 7%
Mailchimp3,639 companies · 7%SendGrid3,400 companies · 7%
microsoft_teams3,288 companies · 6%
microsoft_intune2,955 companies · 6%
Microsoft Entra ID2,937 companies · 6%
Resend2,149 companies · 4%
Amazon SES1,806 companies · 3%
AWS Route 531,727 companies · 3%
Brevo1,704 companies · 3%Mailgun1,594 companies · 3%apple1,552 companies · 3%
facebook_pixel1,542 companies · 3%
Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

51,894 companies carry fastmail on their website or in their DNS records; no company names it in its job postings yet. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/fastmail)
How we know

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 →

  • Website codeScripts, tags and embeds found on the company's own pages in our crawl of 41.5M sites. A tool counts once per company.
  • DNS recordsSPF includes, DKIM selectors, MX and CNAME records of the company's domain that point at fastmail or another vendor. Swept in cycles; dedicated mail-provider and hosting facets open once coverage passes 80% per country.
  • Job postingsRead hourly from the applicant tracking systems behind company career sites. A tool counts when the employer's own text names it as the team's system; candidate wish-lists and apply boilerplate are excluded. Confidence low, medium or high per company.
  • Sending infrastructureCold-e-mail sending domains are look-alike domains on a provider's infrastructure (DNS records, certificate logs) that redirect to the company. Absence is not evidence: only companies with a found sending domain are counted.
  • CompaniesCountry, size and industry come from the company profile we build from its website; headcount from LinkedIn where known, otherwise estimated. Job boards, portals and aggregators are kept out of lists.
FAQ

fastmail data: questions

How many companies use fastmail?

51,894 as of 4 November 2026: 51,894 carry fastmail on their website or in their DNS records and 0 name it in their own job postings; 0 show up in both. We keep the two counts apart because they measure different things.

What does "website or DNS" mean?

Our crawler finds fastmail's scripts, embeds and tags on the company's own pages, and our DNS sweep reads the domain's mail and hosting records (SPF includes, DKIM selectors, MX, CNAMEs) that point at fastmail. Either one puts the company in the footprint. The sweep is still running, so this number grows week by week.

Why is the job-posting number so much smaller?

A posting only names a tool when the team that will use it is hiring and chooses to say so. That makes it a smaller but stronger signal: it tells you which team runs fastmail, with a quote and a date. The footprint tells you reach.

How fresh is this?

Career sites are read hourly, websites are re-crawled on a rolling schedule and DNS is re-swept in cycles. The date at the top is when these counts were computed.

Can I get the list?

Yes. The first 20 are on this page; the full 51,894 with verified e-mails and a weekly feed of new fastmail users is in the product. Counting is free.

Companies and people

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