Tools · vulnerability management

Companies using ACAS_

As of 4 November 2026, 373 companies name ACAS in their own job postings; it leaves no trace on websites or in DNS.

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

Largest market
–
Companies with 51+ staff
–
Top industry
–
Team that names it most
IT operations & business systems · 1,583 postings
Hiring on it, last 30 days
332 companies
Most often alongside
Nessus · 222 companies
373companies show ACAS, all sources
0on their website or in DNS records
373name it in their own job postings
1,745postings naming ACAS, last 90 days
02 — Two ways we see a tool

Where ACAS 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 footprint0

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

Job postings373

Companies whose own postings say the team works in ACAS. 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 ACAS. The rest of the posting population (373) runs ACAS without a public trace on the site or in DNS, which is where job data earns its place.

03 — Who uses it

Companies on ACAS

Companies with 201+ employees and high-confidence evidence in their own postings; job boards and portals left out.

L3HarrisDefence systems manufacturers · Melbourne, United States10,001+ employeesNorthrop GrummanDefence systems manufacturers · Falls Church, United States10,001+ employeesApogeeDefence systems manufacturers · Colorado Springs, United States501-1000 employeesEPS CorporationDefence systems manufacturers · United States201-500 employeesRTXDefence systems manufacturers · Arlington, United States10,001+ employeesJ.F. Taylor, Inc.Defence systems manufacturers · Great Mills, United States201-500 employeesShield AIDefence systems manufacturers · United States501-1000 employeesUrsa MajorOther aerospace & defence manufacturing · Berthoud, United States201-500 employeesTrideum CorporationOther testing inspection & contract research · United States201-500 employeesSummit 7 Systems, LLCSME managed IT services · 201-500 employeesPratt & Whitney KaliszAircraft manufacturers · Kalisz, Poland1001-5000 employeesV2XDefence systems manufacturers · Virginia, United States10,001+ employeesCanvasOther testing inspection & contract research · Huntsville, United States201-500 employeesDelaware Nation Industries & InvestmentsIT services & consulting · Oklahoma City, United States201-500 employeesCOLSAIT services & consulting · Huntsville, United States1001-5000 employeesKatmai Government ServicesGovernment agencies & ministries · United States1001-5000 employeesCALIBREManaged cybersecurity services · Alexandria, United States501-1000 employeesCAE Inc.Other B2B SaaS platforms · Saint-Laurent Southeast, Canada10,001+ employees
373 companies show ACAS; 0 of them have over 1,000 employees.

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06 — Job-posting evidence

Who runs ACAS inside the company

The 373 companies whose postings name ACAS: 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
1,583 · 355
Finance & accounting
115 · 63
Engineering (non-software)
85 · 36
Software engineering
58 · 32
skilled trades and field service
26 · 3
Product, program & project management
21 · 17
Legal, compliance & risk
17 · 14
Data & AI
16 · 12
Human resources
15 · 9
Customer service & success
7 · 5
Posting companies by country
companiesshare
United States
32587%
United Kingdom
185%
Canada
62%
Spain
31%
Switzerland
21%
Australia
10%
Czechia
10%
Germany
10%
Denmark
10%
France
10%
Ireland
10%
India
10%
Posting companies by size
companiesshare
Self-employed
72%
2-10 employees
133%
11-50 employees
3710%
51-200 employees
10829%
201-500 employees
6918%
501-1000 employees
3710%
1001-5000 employees
4512%
5001-10000 employees
175%
10,001+ employees
4011%
Hiring on it right now
postings
Postings, last 30 days
1,248
Postings, last 90 days
1,745
All open postings
2,165

332 companies opened a role that names ACAS 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 ACAS teams also ask for

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

08 — vulnerability management

ACAS 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.

373 companies name ACAS in their own job postings; it leaves no trace on websites or in DNS, so the posting layer is the whole picture. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/acas)
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 ACAS 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

ACAS data: questions

How many companies use ACAS?

373 as of 4 November 2026: 0 carry ACAS on their website or in their DNS records and 373 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 ACAS'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 ACAS. 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 ACAS, 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 373 with verified e-mails and a weekly feed of new ACAS users is in the product. Counting is free.

Companies and people

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Every company on ACAS,
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