Companies Using NitroPack

I pulled NitroPack out of our October 2026 crawl to answer a narrow question: who pays a cloud service to make a WordPress site fast? A domain counts here when its pages carry the generator meta tag that NitroPack writes into the pages it has optimised. That gives 36,257 live domains, 25,278 of them matched to a company, 4th of 12 in Caching. On 16 October I fetched 800 random live domains. 663 showed NitroPack in the page or its response headers, 61 blocked our request, and most of the rest failed to load, returned an error or redirected elsewhere. The signal is clean. What it measures needs a closer look.

Three ways to be a NitroPack site

The 663 pages fall into three groups of about the same size. 224 (33.8%) were served by WP Engine, which announced its acquisition of NitroPack on 18 July 2024 and had already been selling NitroPack's technology to its hosting customers as Page Speed Boost. 239 (36.0%) carried the NitroPack badge, which the plugin's WordPress.org listing says comes with the Free plan. The other 213 (32.1%) showed neither, so they're the likeliest direct, paying accounts. The groups add up to 676 because 13 WP Engine pages also carried the badge. Our stack data agrees on the first group: WP Engine hosts 33.15% of the 35,624 live NitroPack domains.

Sales signal: a NitroPack list is three lists. The badge third are free users on small sites, the WP Engine third buy through their host, and the rest are the likeliest to pay NitroPack directly. Split them before you pitch.

A slow climb with real churn

The chart reads 33,527 in June, 35,093 in July, 34,839 in August, 35,727 in September and 36,257 in October. Part of that movement is ours: the domains we crawl turn over every month as dead sites drop out and new ones are added, and our detection widens over time. Underneath, the base churns. 12,539 domains have dropped NitroPack from at least one hostname since we started tracking it on 16 March 2026, and when I re-checked, 1,464 of those still ran it on another hostname of the same domain.

"The NitroPack customer worth a call often isn't on NitroPack's own invoice. A third of these sites buy it through WP Engine, and among the largest companies it's closer to three in four." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: treat NitroPack as a pool of about 36,000 domains with steady turnover. For a competing speed tool, the domains that dropped it are a sharper list than the installed base.

Small businesses, big-company hosting

52.41% of matched companies with a known size have 1 to 10 employees and 29.58% have 11 to 50. The 2010s are the biggest founding decade at 38.28%. That's a free-plan crowd. The top of the list looks different. 342 companies have more than 1,000 staff, and when I read the response headers of the biggest names, 32 of the 43 I could read were on WP Engine: GoTo Foods, UniFirst, Greif, Sportradar, Alteryx, Clario, Maples Group and CHOC among them. Empresas Polar, the Venezuelan food group, was an exception, running NitroPack's own plugin elsewhere. I didn't find a NitroPack customer page to cross-check these names against.

Sales signal: at large companies the NitroPack decision usually came with a WP Engine contract. A replacement has to beat the host's own add-on, so start with the team that owns the WP Engine account.

Law firms, builders and clinics

The United States has 11,822 matched companies, then the United Kingdom (2,110), Australia (1,417), India (1,124) and Canada (988). Construction leads the industries at 6.27%, and law firms reach 6.69% once Law Practice (4.31%) and Legal Services (2.38%) are combined. Medical Practices add 3.6%. These are businesses whose website exists to make the phone ring. Some run whole domain portfolios through one NitroPack site. Davis Law Group, a Seattle injury firm, accounts for 38 domains, and eReleases, the press-release distributor, for 174.

Sales signal: US law firms, contractors and clinics are the core. Dedupe by redirect target first, because portfolio owners like eReleases inflate any domain count.

Overlap, not switching

NitroPack rarely replaces another cache; it sits on top of one. 5,900 NitroPack domains also run LiteSpeed Cache today, out of 8,830 ever seen with both. Another 252 run WP Rocket and 230 send Varnish headers from their host. The switching rows that pass our tests are small: 12 domains went from NitroPack to SpeedyCache. With W3 Total Cache, 6 domains moved from W3 Total Cache to NitroPack and 3 the other way, too few to count as a switching corridor.

"Two in three domains ever seen with NitroPack and LiteSpeed Cache together still run both. Site owners stack these tools rather than swap them." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: don't pitch a NitroPack site as a rip-and-replace. A server cache, image tooling or hosting sold alongside it fits how these sites are already built.

The stack around it

WordPress runs on 95.91% of NitroPack domains, Elementor on 29.27% and Divi on 5.64%. Cloudflare sits in front of 50.31%; the WP Engine sites in my sample answered through Cloudflare too. After WP Engine (33.15%), and leaving aside GoDaddy's 23.47%, which is mostly domain and mail records, the most common hosts are Hostinger (6.8%), Kinsta (2.48%) and SiteGround (2.32%). The 4.09% without WordPress are sites on other platforms.

Sales signal: the typical NitroPack site is an Elementor-built WordPress marketing site behind Cloudflare. Agencies that rebuild those sites, and hosts competing with WP Engine, have the clearest pitch.

What reviewers say

On WordPress.org, NitroPack has 311 ratings: 245 five-star and 48 one-star, a split score for a plugin listed with 80,000+ active installations. Pricing by traffic is part of the story. NitroPack's pricing page caps the Free plan at 1,000 pageviews a month, Starter at 8,000 and Plus at 40,000, and calls the cap the traffic you can generate "before optimizations stop" (checked 16 October 2026). A site that outgrows its tier loses the speed it paid for, and that reads like one source of the one-star reviews.

Sales signal: busy free-plan sites are upgrade prospects for NitroPack and switch prospects for everyone else.

What I checked before trusting the count

I looked for one-operator fleets and dead pages. The largest fleet is eReleases: 174 domains redirect to its site, about 0.49% of the clean count. MediaOptions, a domain broker, has 22 short domains that redirect to its own NitroPack site, and those are names for sale, not customers. Across the whole set, 434 domains (1.22%) no longer resolve or show an error, maintenance or for-sale page. Neither changes the picture, so the published count stands.

Key takeaways

• 36,257 live domains, 1.28% of Caching, 4th of 12.
• About a third WP Engine, a third free plan and a third direct accounts.
• 81.99% of matched companies have 50 or fewer staff, yet 32 of the 43 largest names I could check are WP Engine customers.
• NitroPack is stacked, not swapped: 5,900 domains run LiteSpeed Cache too.
• 12,539 domains have dropped it from a hostname since March 2026, 1,464 of them still running it on another, so the base turns over.

Sales applications

Outreach: "Your site serves NitroPack-optimised pages through WP Engine. Teams in that setup usually ask us about [your product] once traffic outgrows their plan." Keep it to the setup you can see.

Targeting: on TechnologyChecker.io, filter NitroPack domains to the United States and 51 or more employees, then split by WP Engine hosting. The WP Engine segment is a host conversation; the rest is a direct NitroPack account.

Competitive angle: the 12,539 domains that dropped NitroPack from a hostname since March 2026, less the 1,464 that still run it elsewhere, are the sharpest list. Some are dead sites or moved hosts, so check each one before you pitch.

The full list of 36,257 NitroPack domains, with 25,278 matched to a company, is on TechnologyChecker.io.