Companies Using W3 Total Cache

W3 Total Cache is the oldest plugin in this corner of our Caching table, and our October 2026 crawl reads it from one HTTP header: X-Powered-By: W3 Total Cache. That header appears on 22,193 live domains, 14,403 of them matched to a company, 5th of 12 in Caching. The catch is in the plugin's own code. In W3 Total Cache's configuration defaults, the setting that adds the header to pages is off. Every domain here is one where an admin, or a platform, switched it on. With 900,000+ active installations listed on WordPress.org, our count is a floor, and a particular one: sites set up by someone who went through the settings.

The version number dates the setup

Until June 2026 the header carried the plugin's version. Of the 21,835 live domains with a recent detection, version 2.9.4, the last release before that change, leads with 1,619. 8,847 (40.52%) send no version at all, which W3 Total Cache has done since 2.10.0 came out on 24 June 2026, so most of those are sites that keep updating. At the other end, 3,635 (16.65%) report a version from before 2.0.0, released in December 2020. The plugin can also write the header into .htaccess or nginx rules, so an old number may describe a configuration nobody has saved since rather than the code running today. The gap matters more since June: 2.10.0 was a security release, and NIST lists CVE-2026-57623, an unauthenticated code-execution flaw scored 9.0, for every version up to 2.9.4. That covers all 12,988 domains (59.48%) whose header still prints a version, as far as the header reflects the code they run.

"One W3 Total Cache site in six still reports a version from before 2021. For a plugin that sits in front of every page, that's a maintenance gap anyone can see from outside." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: the version is a filter. Every domain that still prints a version is in the CVE-2026-57623 range, so all of them are leads for WordPress maintenance and security agencies, the 0.x and early 2.x builds first. Domains with no version have updated since June, but not necessarily since: releases before 2.10.5 carry CVE-2026-18051, scored 10.0.

Platforms that installed it for their clients

About 2,600 domains got W3 Total Cache from a platform rather than an owner. The biggest group reports a build number WordPress.org never published: 1,207 live domains, 717 of them on A2 Hosting's network. A2's own A2 Optimized WP plugin required W3 Total Cache until its version 2.1, so this is almost certainly A2's copy, left in place. Next is ProSites, a dental website and marketing company, whose sites account for 692 domains (3.14%). Then LifeLearn, which builds sites for veterinary practices: 534 domains with veterinary titles report the same plugin version from a handful of Amazon and Oracle cloud servers, and the six I opened all loaded LifeLearn's site files. A single server in Montana carries 171 local newspapers and press associations, all on 2.8.5.

Sales signal: for those 2,600 domains the buyer is the platform. A dental practice on ProSites won't swap its cache plugin, but ProSites might, so sell to the platform or skip these rows.

Small, established and quite European

65.15% of matched companies with a known size have 1 to 10 employees and 88.78% have 50 or fewer. The 2010s are the biggest founding decade (42.93%), and only 8.21% were founded in the 2020s, against 14.46% on NitroPack's profile and 28.5% on SpeedyCache's. The United States leads with 4,614 matched companies, but Germany is second with 1,116, ahead of the United Kingdom (1,043). The Netherlands (682), Italy (531) and France (449) add more European weight than LiteSpeed Cache, NitroPack or SpeedyCache show.

Sales signal: W3 Total Cache marks older small-business sites that someone set up carefully and then left alone. German and Dutch agencies selling rebuilds or care plans will find a well-qualified list here.

Large organisations use it on side sites

Only 116 matched companies have more than 1,000 staff. Some run it on the main site: Cimpress, Recordati and Grid Dynamics all sent the header from their home pages. Others keep it on a secondary property. Loyola University Chicago uses it on its news site, Caltech on its alumni site, the American Enterprise Institute on its annual report and Erlanger on its HealthyU blog.

Sales signal: at large organisations, look for the team that owns the microsite. The central web team may have no idea W3 Total Cache is running.

Stacked with other caches, not swapped

790 W3 Total Cache domains also run LiteSpeed Cache today, out of 1,315 ever seen with both. Another 192 run WP Rocket, 172 sit behind Varnish and 3 run NitroPack. None of these pairs passes our switching tests, NitroPack included (6 domains moved from W3 Total Cache to NitroPack and 3 the other way, too few to count as a switching corridor), so we publish no migration table. Since we began tracking on 16 March 2026, 4,893 domains have dropped W3 Total Cache from at least one hostname, and 508 of them still send the header from another one.

"W3 Total Cache doesn't lose sites to one rival in our data. Domains that drop it don't land on any single competitor often enough to call it a switch." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: there's no rival to displace here, only an old setup to replace. Lead with a rebuild or a managed host, not a feature comparison.

The stack around it

WordPress runs on 97.18% of W3 Total Cache domains. Apache serves 41.98%, about twice NitroPack's 19.14%, which fits a plugin that writes its rules into Apache's .htaccess files. Cloudflare sits in front of 25.06%. Elementor (17.74%), Divi (7.89%) and WPBakery (5.42%) are the usual builders.

Sales signal: this is Apache shared hosting with a page builder on top. Managed WordPress hosts have an easy story, and so do teams offering a move to a modern stack.

What reviewers say

On WordPress.org, W3 Total Cache has 5,420 ratings: 4,057 five-star and 516 one-star, so 9.5% gave the lowest mark. It's free, and BoldGrid's Pro tier costs $99 a year for one site, $350 for five and $500 for ten (checked 16 October 2026). The many settings that earn it loyal users are also what make it easy to misconfigure, and our version data shows how many sites were configured once and left.

Sales signal: a $99 Pro licence is a small budget line. A plugin or service that removes the configuration work competes on time saved, not price.

What I checked before trusting the count

Across the whole set, 358 domains (1.63%) no longer resolve or show an error, maintenance or suspended page, too few to change the picture. On 16 October I fetched 300 random domains from the set. 218 loaded, and 210 of those (96.3%) still sent the W3 Total Cache header, so the signal holds up; 104 also served the plugin's page-cache comment, which shows it actively caching that page.

Key takeaways

• 22,193 live domains send the header, 0.79% of Caching, 5th of 12: a floor, because the header is off by default.
• 40.52% send no version (2.10 or later); the other 59.48% report 2.9.4 or older, the range of CVE-2026-57623, and 16.65% a build from before 2021.
• About 2,600 domains got the plugin from a platform: A2 Hosting's old build, ProSites and LifeLearn lead.
• 88.78% of matched companies have 50 or fewer staff, and Germany is the second country.
• No switching corridor passes our tests; sites stack it with LiteSpeed Cache instead.

Sales applications

Outreach: "Your site's server still reports W3 Total Cache [version]. We help teams with older WordPress setups like yours move to [your offer] without a rebuild." Use the version only if your data shows it.

Targeting: on TechnologyChecker.io, filter W3 Total Cache domains to 11 or more employees in the United States, Germany or the Netherlands, then drop ProSites, LifeLearn and A2 Hosting rows, whose owners didn't choose the plugin.

Competitive angle: the 790 domains running LiteSpeed Cache beside W3 Total Cache are running two page caches. That's a clean-up conversation, and an opening for a host or performance service.

The full list of 22,193 W3 Total Cache domains, with 14,403 matched to a company, is on TechnologyChecker.io.