Shipvane · 4 AE roles
Marco E. · joined Cargolio
Fleetora · first roles in DECompanies using Slack_
As of 4 November 2026, 19,946 companies show Slack: 15,520 carry it on their website or in their DNS records, 5,079 name it in their own job postings, and 653 do both.
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Largest market
- United States · 9,224 companies
- Companies with 51+ staff
- 5,570 · 36% of the footprint
- Top industry
- Technology & software · 43%
- Team that names it most
- Marketing & communications · 3,971 postings
- Hiring on it, last 30 days
- 3,554 companies
- Most often alongside
- Zoom · 1,119 companies
Where Slack shows up
Each population is counted on its own. We never add them up without saying so, because they answer different questions.
Companies whose own pages load Slack's scripts or embeds, or whose domain's mail and hosting records (SPF, DKIM, MX, CNAME) point at Slack. From our crawl of 41.5M company websites and the DNS sweep behind it. Reach: the tool is in the building.
Companies whose own postings say the team works in Slack. Read hourly from ~70 applicant tracking systems, with the function, a quote and a date. Intent: the team that runs it is hiring.
Companies in the footprint whose postings also name Slack. The rest of the posting population (4,426) runs Slack without a public trace on the site or in DNS, which is where job data earns its place.
Companies on Slack
Companies with 201+ employees and high-confidence evidence in their own postings; job boards and portals left out.
Companies with 1,000+ employees whose website or DNS carries Slack but whose postings never name it: the part of the market job data alone misses.
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By country, company size and industry
The 15,520 companies with Slack on their website or in DNS. Click a country for its own page where we have one.
| companies | share | |
|---|---|---|
| United States | 9,224 | 59% |
| United Kingdom | 1,287 | 8% |
| Germany | 661 | 4% |
| Australia | 618 | 4% |
| Canada | 451 | 3% |
| France | 328 | 2% |
| Brazil | 284 | 2% |
| Netherlands | 269 | 2% |
| Sweden | 158 | 1% |
| Switzerland | 156 | 1% |
| Spain | 148 | 1% |
| India | 128 | 1% |
| companies | share | |
|---|---|---|
| Self-employed | 2,198 | 14% |
| 2-10 employees | 2,802 | 18% |
| 11-50 employees | 4,722 | 30% |
| 51-200 employees | 3,380 | 22% |
| 201-500 employees | 1,133 | 7% |
| 501-1000 employees | 488 | 3% |
| 1001-5000 employees | 429 | 3% |
| 5001-10000 employees | 57 | 0% |
| 10,001+ employees | 83 | 1% |
| companies | share | |
|---|---|---|
| Technology & software | 6,631 | 43% |
| Business & finance services | 3,999 | 26% |
| Media & content | 878 | 6% |
| Public, community & associations | 786 | 5% |
| Consumer services & leisure | 677 | 4% |
| Manufacturing & industry | 627 | 4% |
| Commerce & trade | 427 | 3% |
| Property & construction | 320 | 2% |
| Health care | 305 | 2% |
| Utilities & infrastructure | 209 | 1% |
| Hospitality & travel | 171 | 1% |
| Transport, logistics & rental | 161 | 1% |
The mail, hosting and web stack of Slack 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.
Who runs Slack inside the company
The 5,079 companies whose postings name Slack: by country, size and the function of the role. The second number in the function table is companies.
| postings · companies | |
|---|---|
| Marketing & communications | 3,971 · 646 |
| Software engineering | 2,196 · 1,088 |
| Sales | 1,711 · 699 |
| IT operations & business systems | 1,340 · 859 |
| Customer service & success | 1,299 · 668 |
| Administration & office | 1,067 · 606 |
| Product, program & project management | 1,004 · 626 |
| Data & AI | 671 · 415 |
| Human resources | 551 · 327 |
| Finance & accounting | 501 · 271 |
| companies | share | |
|---|---|---|
| United States | 3,493 | 69% |
| United Kingdom | 325 | 6% |
| Germany | 199 | 4% |
| Canada | 122 | 2% |
| France | 96 | 2% |
| Japan | 70 | 1% |
| India | 64 | 1% |
| Australia | 53 | 1% |
| Netherlands | 40 | 1% |
| Brazil | 39 | 1% |
| Poland | 35 | 1% |
| Spain | 31 | 1% |
| companies | share | |
|---|---|---|
| Self-employed | 286 | 6% |
| 2-10 employees | 764 | 15% |
| 11-50 employees | 1,195 | 24% |
| 51-200 employees | 1,260 | 25% |
| 201-500 employees | 607 | 12% |
| 501-1000 employees | 375 | 7% |
| 1001-5000 employees | 387 | 8% |
| 5001-10000 employees | 75 | 1% |
| 10,001+ employees | 130 | 3% |
| postings | |
|---|---|
| Postings, last 30 days | 12,826 |
| Postings, last 90 days | 16,589 |
| All open postings | 21,555 |
3,554 companies opened a role that names Slack in the last 30 days. A hiring team that names its tools is the moment to write to the person who owns the stack.
What Slack teams also ask for
Tools named in the same postings as Slack. Office software is left out.
Slack against the rest of its category
Ranked by companies naming each tool in postings. Whole category →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
19,946 companies show Slack: 15,520 carry it on their website or in their DNS records, 5,079 name it in their own job postings, and 653 do both. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/slack)
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 Slack 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.
Slack data: questions
How many companies use Slack?
19,946 as of 4 November 2026: 15,520 carry Slack on their website or in their DNS records and 5,079 name it in their own job postings; 653 show up in both. We keep the two counts apart because they measure different things.
What does "website or DNS" mean?
Our crawler finds Slack'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 Slack. 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 Slack, 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 19,946 with verified e-mails and a weekly feed of new Slack users is in the product. Counting is free.
Get this list your way
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Every company on Slack,
with the person who owns it
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