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Technologies · September 2026

Which Operating systems is readiest for AI agents?

6 measured, averaging 14.6% against 21.0% for the web overall. Run web servers and infrastructure

Every one of them, best first

How to read these figures

The colour says what a bar IS, not how it scores: the accent is the one this page is about, grey is everything it is compared with, and the hollow bar is the web overall — the ruler, not a rival. Whether a figure is above or below the rest of the web is in the number and in the arrow beside it.

Every figure here comes from a sample, not from counting every site — so it carries a margin: how much it could move if we had happened to sample different pages. A figure measured on a thousand pages has a wide margin; one measured on a hundred thousand has a narrow one. It matters for one thing: two figures that differ by less than the wider of their margins are not one above the other, they are tied. That is why nothing here has a position number.

Every technology in this category the census can publish a figure for, including the ones above. A technology is here when it has all four dimensions and enough sample to publish; a technology that belongs to two categories is in both.

TechnologyAWCSMonth by month
Ubuntu

Ubuntu

Sample
n=3,378
Coverage
95.8%
Margin
±0.91
The web overall
21.0%

Two figures closer together than ±0.91 are tied, not ranked.

Ubuntu scores 17.0%17.0%
Ubuntu: 5 months, no significant change= −0.0
UNIX

UNIX

Sample
n=767
Coverage
97.6%
Margin
±1.91
The web overall
21.0%

Two figures closer together than ±1.91 are tied, not ranked.

UNIX scores 16.5%16.5%
UNIX: 5 months, no significant change= −1.1
Windows Server

Windows Server

Sample
n=4,051
Coverage
95.8%
Margin
±0.83
The web overall
21.0%

Two figures closer together than ±0.83 are tied, not ranked.

Windows Server scores 15.6%15.6%
Windows Server: 5 months, no significant change= −0.1
Debian

Debian

Sample
n=1,078
Coverage
96.3%
Margin
±1.61
The web overall
21.0%

Two figures closer together than ±1.61 are tied, not ranked.

Debian scores 14.1%14.1%
Debian: 5 months, no significant change= −1.1
CentOS

CentOS

Sample
n=448
Coverage
97.2%
Margin
±2.50
The web overall
21.0%

Two figures closer together than ±2.50 are tied, not ranked.

CentOS scores 12.8%12.8%
CentOS: 5 months, up▲ +3.1
AlmaLinux

AlmaLinux

Sample
n=120
Coverage
94.5%
Margin
±4.84
The web overall
21.0%

Two figures closer together than ±4.84 are tied, not ranked.

AlmaLinux scores 11.6%11.6%
AlmaLinux: 3 months, no significant change= −2.5