Shipvane · 4 AE roles
Marco E. · joined Cargolio
Fleetora · first roles in DECentOS VS Unix_
As of 4 November 2026, Unix is named by 2,662 companies and CentOS by 765; CentOS skews to companies under 200 people (50% vs 43%), Unix to companies over 1,000 (34% vs 26%).
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
The website-and-DNS footprint is not comparable between a marketing suite and a CRM: CentOS's script and mail records show on hundreds of thousands of small sites, Unix rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- CentOS: 2–200 employees
- 50%
- Unix: 2–200 employees
- 43%
- CentOS: 1,000+ employees
- 26%
- Unix: 1,000+ employees
- 34%
- Postings per company, 90 days
- 2.2 · 3.4
- Website or DNS footprint
- 0 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | CentOS | share | Unix | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 16 | 2% | 63 | 2% | even |
| 2-10 employees | 53 | 7% | 183 | 7% | even |
| 11-50 employees | 132 | 17% | 444 | 17% | even |
| 51-200 employees | 196 | 26% | 515 | 19% | CentOS |
| 201-500 employees | 93 | 12% | 321 | 12% | even |
| 501-1000 employees | 74 | 10% | 242 | 9% | even |
| 1001-5000 employees | 87 | 11% | 386 | 15% | Unix |
| 5001-10000 employees | 29 | 4% | 132 | 5% | even |
| 10,001+ employees | 85 | 11% | 376 | 14% | Unix |
| Segment | CentOS | share | Unix | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 407 | 53% | 1,305 | 49% | CentOS |
| Business & finance services | 131 | 17% | 536 | 20% | Unix |
| Manufacturing & industry | 84 | 11% | 257 | 10% | even |
| Utilities & infrastructure | 29 | 4% | 90 | 3% | even |
| Media & content | 28 | 4% | 84 | 3% | even |
| Public, community & associations | 20 | 3% | 102 | 4% | even |
| Consumer services & leisure | 19 | 2% | 83 | 3% | even |
| Commerce & trade | 15 | 2% | 48 | 2% | even |
| Property & construction | 8 | 1% | 22 | 1% | even |
| Transport, logistics & rental | 8 | 1% | 37 | 1% | even |
| Health care | 7 | 1% | 61 | 2% | even |
| Automotive | 5 | 1% | 20 | 1% | even |
| Segment | CentOS | share | Unix | share | Leans |
|---|---|---|---|---|---|
| United States | 413 | 54% | 1,553 | 58% | Unix |
| United Kingdom | 44 | 6% | 130 | 5% | even |
| France | 42 | 5% | 123 | 5% | even |
| India | 34 | 4% | 96 | 4% | even |
| Germany | 29 | 4% | 118 | 4% | even |
| Singapore | 14 | 2% | 30 | 1% | even |
| Canada | 10 | 1% | 65 | 2% | even |
| Italy | 10 | 1% | 33 | 1% | even |
| Netherlands | 10 | 1% | – | – | outside top 12 |
| Poland | 10 | 1% | 27 | 1% | even |
| Japan | 9 | 1% | – | – | outside top 12 |
| Czechia | 6 | 1% | – | – | outside top 12 |
| Spain | – | – | 33 | 1% | outside top 12 |
| Australia | – | – | 24 | 1% | outside top 12 |
| Switzerland | – | – | 24 | 1% | outside top 12 |
| Segment | CentOS | share | Unix | share | Leans |
|---|---|---|---|---|---|
| IT operations & business systems | 1,108 | 45% | 4,076 | 28% | CentOS |
| Software engineering | 722 | 30% | 4,835 | 33% | Unix |
| Engineering (non-software) | 130 | 5% | 1,007 | 7% | even |
| Customer service & success | 84 | 3% | 317 | 2% | even |
| Data & AI | 32 | 1% | 1,005 | 7% | Unix |
| Product, program & project management | 15 | 1% | 153 | 1% | even |
| Sales | 11 | 0% | 115 | 1% | even |
| Quality, safety & environment | 6 | 0% | 51 | 0% | even |
| Education & training | 5 | 0% | 30 | 0% | even |
| Marketing & communications | 5 | 0% | 8 | 0% | even |
| Administration & office | 4 | 0% | 31 | 0% | even |
| General management & consulting | 3 | 0% | 26 | 0% | even |
| Unclassified | 2 | 0% | 48 | 0% | even |
| hospitality and food service | 1 | 0% | 6 | 0% | even |
| Legal, compliance & risk | 1 | 0% | 30 | 0% | even |
| research and science | 1 | 0% | 180 | 1% | even |
| Finance & accounting | – | – | 117 | 1% | outside top 12 |
| skilled trades and field service | – | – | 52 | 0% | outside top 12 |
| Design & UX | – | – | 24 | 0% | outside top 12 |
| arts media and entertainment | – | – | 20 | 0% | outside top 12 |
| logistics warehouse and transport | – | – | 15 | 0% | outside top 12 |
| manufacturing and production | – | – | 15 | 0% | outside top 12 |
| public safety and protective services | – | – | 12 | 0% | outside top 12 |
| healthcare clinical | – | – | 11 | 0% | outside top 12 |
| facilities cleaning and security | – | – | 9 | 0% | outside top 12 |
| Human resources | – | – | 7 | 0% | outside top 12 |
| real estate and property | – | – | 6 | 0% | outside top 12 |
| construction and civil | – | – | 5 | 0% | outside top 12 |
| procurement and purchasing | – | – | 2 | 0% | outside top 12 |
| Business development & strategy | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using CentOS →
Companies using Unix →
linux unix ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Unix is named by 2,662 companies in job postings and CentOS by 765; 107 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/centos-vs-unix)
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 career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
- 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.
- SegmentsCountry, size and industry from the company profile built from its website.
- Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
CentOS vs Unix: questions
Which is more used, CentOS or Unix?
By companies naming it in their own job postings, Unix (2,662) over CentOS (765). By website-and-DNS footprint, Unix (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses CentOS?
50% of CentOS companies have 2 to 200 employees, against 43% for Unix. 26% of CentOS companies have over 1,000 employees, against 34% for Unix.
Do companies run both?
107 companies name both in their postings, usually CentOS in marketing and Unix in sales, or during a migration.
Where do these numbers come from?
From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.
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