Companies Using Webpack

Webpack is a build tool, so most of what it does happens before a site ships. What a browser can see is the small runtime it leaves behind to load code chunks, and that is what I counted. As of our October 2026 crawl, TechnologyChecker.io finds that runtime's global on 699,804 live domains, with 386,036 organisations matched to a company record. It's the largest footprint in our Developer Tooling category, and a third of it comes from one website builder.

What the signal catches

Our rule checks for two exact global names. webpackJsonp is the chunk array webpack 4 builds create. In webpack 5, webpack's documentation says the default name is webpackChunk followed by the project's unique name, which comes from package.json; only builds without one keep the bare webpackChunk. Renamed globals don't match. That leaves out Next.js (webpackChunk_N_E) and third-party SDKs we saw in our sample, such as Stripe.js and the Didomi and Axeptio consent tools. So the count is a floor, tilted toward webpack 4 and toward builds without a package name. npm lists webpack 5.111.1 as the latest release, published in September 2026; webpack 5.0.0 shipped in October 2020.

Who put webpack on the page

I opened 40 random live webpack domains in a browser. 33 loaded, and 30 exposed one of the two counted globals: 17 webpackJsonp and 13 webpackChunk. All six Webflow sites in the sample used the bare webpackChunk, because Webflow's site runtime is a webpack bundle. Across the full stack analysis Webflow runs on 30.78% of domains and Webflow Ecommerce on 5.0%. The webpackJsonp pages were a mix: custom company apps, Nuxt sites, WordPress sites, betting apps and two domains that redirect to Microsoft's sign-in page.

Some of the count isn't anyone's front end. 13,597 domains (1.97%) are for-sale landers on domainname.de, which loads its own webpack bundle, and 16,046 (2.33%) have numeric names or the title "Welcome", nearly all betting-app shells; four of the 33 pages we loaded were gambling sites. The 3,371 domains titled "Sign in to your account" redirect to Microsoft's hosted login. Together that's about 5% we haven't removed from the headline.

Sales Signal: Split the list three ways before you prospect: Webflow sites, where the platform ships webpack; landers and login redirects, which you drop; and the rest, where a team built and deployed its own bundle.

Coverage, not growth

Our current crawl counts 541,117 domains in June 2026, 655,983 in July, 676,360 in August, 704,663 in September and 699,804 in October. Counts are not a like-for-like series over time: the set of domains we crawl turns over every month, with dead sites dropping out and newly found ones added, and our detection signals widen over time. The 114,866-domain step into July reflects changes on our side, both the domains we cover and the signals we detect webpack with, rather than a surge in adoption. Read the line as our crawl's reach into the signal.

Exits are more telling. 106,872 domains have dropped the global on at least one hostname since we began tracking it in March 2026, and when we rechecked on 13 October only 16,689 of 106,883 (15.6%) still ran it on another hostname. A site loses the exact global when it rebuilds on webpack 5 with a package name, moves to another bundler, or goes offline.

"The largest single source of webpack on the web isn't a company that chose it. It's Webflow, whose site runtime puts webpack on nearly a third of the domains we count." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales Signal: Treat the monthly total as flat and the exits as the live signal. A domain that drops webpackJsonp has usually rebuilt its front end, which makes it a fresh prospect for hosting, performance or agency work.

The companies behind the domains

57.09% of matched companies with a size band have 1-10 employees and 82.65% have 50 or fewer, against 69.03% at 1-10 employees on Babel's page, with 7,550 companies above 1,000 staff. 62.94% were founded in 2010 or later. In our named list, 40 of 50 detections are on a subdomain, and the surfaces repeat: sign-in pages (ADP, TD Bank), locators (KFC, Safeway, Farmers Insurance agents) and portals (Salesforce AppExchange, HPE's software licensing centre). Of the 40 named pages we confirmed, 30 used webpackJsonp, so large companies' webpack apps are mostly webpack 4 builds. Webpack publishes no customer list, so there was nothing vendor-side to cross-check.

Sales Signal: At an enterprise, a webpackJsonp hit on a login or portal app marks a front end that hasn't moved to webpack 5. That is the team to approach for build modernisation, performance or front-end platform work.

Industry and geographic concentration

Software Development leads at 5.27%, and software, IT services and internet companies together reach 12.68%; on Babel's page Software Development is only 2.03%. The ten largest industries still cover only 34.04%. The United States has 106,624 matched companies (27.62%), and Germany is a strong second with 45,788 (11.86%), ahead of the United Kingdom (28,677), France (19,668) and the Netherlands (16,158). English-speaking countries account for 42.46%, against 55.96% on Babel's page.

Sales Signal: For European developer-tool or agency sales, filter webpack plus Germany, France or the Netherlands and exclude Webflow; what remains is a large pool of in-house builds.

Why there is no migration table

We tested switching corridors and published none. Bundlers sit beside each other on one domain far more often than they replace each other. Babel runs today on 48,210 of the 56,690 domains where we've seen it with webpack, Vite on 2,065 of 2,574, Parcel on 1,551 of 2,008 and Turbopack on 6,140 of 11,531. Those are layers of the same build, or an old app beside a new one.

"A bundler change is invisible from outside until the old global disappears. That's why we count webpack's exits, not its rivals' gains." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales Signal: If you sell Vite-era tooling or migration services, target domains that run webpack and nothing newer. A domain already showing Vite or Turbopack beside webpack is mid-way and may not need you.

Technology ecosystem

Across the 689,829 domains in our stack analysis, jQuery runs on 71.03% and core-js on 65.3%, Lodash on 22.73%, Swiper on 20.06% and GSAP on 11.97%. Vue.js (8.82%) and React (7.36%) are the leading frameworks, with Nuxt.js at 5.58%, Angular at 3.63% and Next.js at only 2.7%. Shopify is on 7.45%, Shopware on 1.6% and Google Analytics on 56.79%.

Sales Signal: The jQuery figure says many of these bundles wrap older front ends. Pitch performance and bundle-size work rather than framework migration.

Key takeaways

1. 699,804 live domains expose webpack's default chunk global; renamed webpack 5 builds aren't counted.
2. Webflow carries 30.78% of the base through its own runtime.
3. About 5% is for-sale landers, betting shells and Microsoft login redirects.
4. Large companies run it on single apps, mostly as webpack 4 builds.
5. Only 15.6% of dropped domains still run it elsewhere, so exits are real.

Sales applications

For targeting, filter Webpack on TechnologyChecker.io, exclude Webflow, and keep companies with 200+ employees; what remains are teams shipping their own builds. For outreach, be specific: "Your sign-in app still runs a webpack 4 build. We move teams to webpack 5 or Vite without a redesign." For competitive work, watch the exits: the 106,872 domains that dropped the global since March are the ones that changed their front end most recently.

The full list of 386,036 matched organisations behind 699,804 webpack domains, with size, industry and country filters, is on TechnologyChecker.io.