Tools · email security awareness

Companies using Tessian_

As of 4 November 2026, 66 companies show Tessian: 63 carry it on their website or in their DNS records, 3 name it in their own job postings, and 0 do both.

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

Largest market
United States · 56 companies
Companies with 51+ staff
53 · 84% of the footprint
Top industry
Business & finance services · 54%
Team that names it most
IT operations & business systems · 7 postings
Hiring on it, last 30 days
3 companies
Most often alongside
Microsoft Entra ID · 2 companies
66companies show Tessian, all sources
63on their website or in DNS records
3name it in their own job postings
7postings naming Tessian, last 90 days
02 — Two ways we see a tool

Where Tessian 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 footprint63

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

Job postings3

Companies whose own postings say the team works in Tessian. 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 Tessian. The rest of the posting population (3) runs Tessian without a public trace on the site or in DNS, which is where job data earns its place.

03 — Who uses it

Companies on Tessian

Every company whose own postings name the tool, any size; job boards and portals left out.

Seen through the website or DNS only

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

66 companies show Tessian; 18 of them have over 1,000 employees.

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04 — Footprint breakdown

By country, company size and industry

The 63 companies with Tessian on their website or in DNS. Click a country for its own page where we have one.

By country
companiesshare
United States
5689%
Australia
46%
United Kingdom
23%
Canada
12%
By company size
companiesshare
Self-employed
12%
2-10 employees
58%
11-50 employees
46%
51-200 employees
1422%
201-500 employees
914%
501-1000 employees
1219%
1001-5000 employees
1422%
5001-10000 employees
46%
By industry
companiesshare
Business & finance services
3454%
Technology & software
914%
Manufacturing & industry
711%
Health care
46%
Transport, logistics & rental
23%
Utilities & infrastructure
23%
Automotive
12%
Commerce & trade
12%
Public, community & associations
12%
Consumer services & leisure
12%
Property & construction
12%
05 — What their DNS and pages also say

The mail, hosting and web stack of Tessian 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.

06 — Job-posting evidence

Who runs Tessian inside the company

The 3 companies whose postings name Tessian: by country, size and the function of the role. The second number in the function table is companies.

Postings by function
postings · companies
IT operations & business systems
7 · 4
Posting companies by country
companiesshare
United Kingdom
267%
United States
133%
Posting companies by size
companiesshare
201-500 employees
133%
5001-10000 employees
133%
10,001+ employees
133%
Hiring on it right now
postings
Postings, last 30 days
5
Postings, last 90 days
7
All open postings
7

3 companies opened a role that names Tessian in the last 30 days. A hiring team that names its tools is the moment to write to the person who owns the stack.

07 — Named alongside

What Tessian teams also ask for

Tools named in the same postings as Tessian. Office software is left out.

08 — email security awareness

Tessian against the rest of its category

Ranked by companies naming each tool in postings. Whole category →

Cite this

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

66 companies show Tessian: 63 carry it on their website or in their DNS records, 3 name it in their own job postings, and 0 do both. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/tessian)
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 Tessian 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

Tessian data: questions

How many companies use Tessian?

66 as of 4 November 2026: 63 carry Tessian on their website or in their DNS records and 3 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 Tessian'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 Tessian. 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 Tessian, 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 66 with verified e-mails and a weekly feed of new Tessian users is in the product. Counting is free.

Companies and people

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