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linux unix, ranked by real usage_

As of 4 November 2026, Linux leads linux unix with 15,946 companies naming it in job postings, ahead of Unix at 2,662.

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

Leader
Linux · 15,946
Runner-up
Unix · 2,662
Most hiring, 90 days
Linux
Highest postings per company
FreeBSD
Catalogue
T-1.0.1-prov
26,729companies across the category
60%of them on Linux
116,270postings naming a linux unix in 90 days
29tools with enough evidence to rank
02 — Ranking

Every linux unix we can measure

Companies naming the tool, and postings naming it in the last 90 days. Bars are relative to the leader.

#ToolCompaniescompaniesPostings, 90 dayspostingsper company
1
LinuxLinux Foundation
15,946
83,6615.2
2
UnixThe Open Group
2,662
9,1723.4
3
Red Hat Enterprise LinuxRed Hat
2,259
9,4454.2
4
UbuntuCanonical
1,521
3,4412.3
5
CentOSRed Hat
765
1,6642.2
6
DebianDebian Project
722
1,3141.8
7
IBM AIXIBM
383
8432.2
8
Oracle SolarisOracle
339
1,1263.3
9
eBPFLinux Foundation
284
9333.3
10
cron
259
4121.6
11
SUSE LinuxSUSE
230
7273.2
12
Rocky LinuxRocky Enterprise Software Foundation
208
5292.5
13
SELinux
177
4342.5
14
AlmaLinuxAlmaLinux OS Foundation
143
2041.4
15
POSIXIEEE
140
2882.1
16
Oracle LinuxOracle
98
3513.6
17
systemdsystemd project
83
1942.3
18
Amazon LinuxAmazon Web Services
64
2483.9
19
AppArmorCanonical
59
1101.9
20
HP-UXHewlett Packard Enterprise
53
1202.3
21
FedoraFedora Project
52
1783.4
22
FreeBSDFreeBSD Foundation
52
3396.5
23
NixOSNixOS Foundation
50
2104.2
24
dmesgLinux Foundation
44
741.7
25
journalctlsystemd project
37
461.2
26
eXpress Data Path (XDP)Linux Foundation
37
782.1
27
ext4Linux kernel community
24
522.2
28
grepGNU Project
21
361.7
29
auditdLinux Foundation
17
412.4
03 — Head to head

Compare two tools

Same data, two columns: who chooses which by size, industry and country.

Linux vs Unix15,946 · 2,662Linux vs Red Hat Enterprise Linux15,946 · 2,259Linux vs Ubuntu15,946 · 1,521Linux vs CentOS15,946 · 765Linux vs Debian15,946 · 722Unix vs Red Hat Enterprise Linux2,662 · 2,259Unix vs Ubuntu2,662 · 1,521Unix vs CentOS2,662 · 765Unix vs Debian2,662 · 722Red Hat Enterprise Linux vs Ubuntu2,259 · 1,521Red Hat Enterprise Linux vs CentOS2,259 · 765Red Hat Enterprise Linux vs Debian2,259 · 722Ubuntu vs CentOS1,521 · 765Ubuntu vs Debian1,521 · 722CentOS vs Debian765 · 722
Cite this

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

Linux leads linux unix with 15,946 companies naming it in job postings, ahead of Unix at 2,662. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/category/linux-unix)
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 →

  • CatalogueBreaknorm technology catalogue T-1.0.1-prov: 6,296 tools with vendor and category, editions folded into their parent.
  • CompaniesCompanies whose own postings name the tool as the team's system, any confidence. Candidate wish-lists excluded.
  • 90-day postingsOpen postings first seen or posted in the last 90 days that name the tool.
  • Not countedTools used by teams that do not post jobs, and companies without a career site we can read.
FAQ

linux unix: questions

How is this ranking made?

By the number of companies whose own job postings name the tool as the team's system, from the Breaknorm technology catalogue (version T-1.0.1-prov). No vendor paid for a position and no editor chose the order.

Why is this different from review-site rankings?

Review sites rank by reviews collected. This ranks by companies hiring people to work in the tool, which is closer to seats in use. It under-counts tools used by teams that rarely post jobs.

What about product editions?

Editions and sub-products () are counted under the parent so no company is counted twice.

Can I get the companies behind a number?

Yes: click a tool, see the first 20, and sign up for the full list with verified e-mails. Counting is free.

Companies and people

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