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Technologies · September 2026

Which Caching is readiest for AI agents?

10 measured, averaging 16.4% against 21.0% for the web overall. Technologies that store frequently accessed data closer to the user to improve page load times

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
Varnish

Varnish

Sample
n=2,834
Coverage
95.8%
Margin
±1.00
The web overall
21.0%

Two figures closer together than ±1.00 are tied, not ranked.

Varnish scores 19.7%19.7%
Varnish: 5 months, no significant change= −0.7
Litespeed Cache

Litespeed Cache

Sample
n=5,986
Coverage
84.1%
Margin
±0.69
The web overall
21.0%

Two figures closer together than ±0.69 are tied, not ranked.

Litespeed Cache scores 18.7%18.7%
Litespeed Cache: 5 months, no significant change= +0.2
NitroPack

NitroPack

Sample
n=214
Coverage
97.7%
Margin
±3.62
The web overall
21.0%

Two figures closer together than ±3.62 are tied, not ranked.

NitroPack scores 18.2%18.2%
NitroPack: 5 months, up▲ +4.2
Google PageSpeed

Google PageSpeed

Sample
n=401
Coverage
98.3%
Margin
±2.65
The web overall
21.0%

Two figures closer together than ±2.65 are tied, not ranked.

Google PageSpeed scores 17.0%17.0%
Google PageSpeed: 5 months, up▲ +3.7
Endurance Page Cache

Endurance Page Cache

Sample
n=633
Coverage
97.5%
Margin
±2.11
The web overall
21.0%

Two figures closer together than ±2.11 are tied, not ranked.

Endurance Page Cache scores 16.3%16.3%
Endurance Page Cache: 5 months, no significant change= +0.3
Super Page Cache

Super Page Cache

Sample
n=146
Coverage
96.0%
Margin
±4.39
The web overall
21.0%

Two figures closer together than ±4.39 are tied, not ranked.

Super Page Cache scores 16.2%16.2%
Super Page Cache: 5 months, no significant change= −1.2
WP Rocket

WP Rocket

Sample
n=4,273
Coverage
96.0%
Margin
±0.81
The web overall
21.0%

Two figures closer together than ±0.81 are tied, not ranked.

WP Rocket scores 15.6%15.6%
WP Rocket: 5 months, no significant change= +0.3
WordPress Super Cache

WordPress Super Cache

Sample
n=1,496
Coverage
96.6%
Margin
±1.37
The web overall
21.0%

Two figures closer together than ±1.37 are tied, not ranked.

WordPress Super Cache scores 15.5%15.5%
WordPress Super Cache: 5 months, no significant change= −0.5
Redis Object Cache

Redis Object Cache

Sample
n=884
Coverage
96.5%
Margin
±1.78
The web overall
21.0%

Two figures closer together than ±1.78 are tied, not ranked.

Redis Object Cache scores 14.6%14.6%
Redis Object Cache: 5 months, no significant change= −0.4
W3 Total Cache

W3 Total Cache

Sample
n=1,348
Coverage
96.7%
Margin
±1.44
The web overall
21.0%

Two figures closer together than ±1.44 are tied, not ranked.

W3 Total Cache scores 12.6%12.6%
W3 Total Cache: 5 months, down▼ −2.7