Companies Using Dart

I pulled Dart out of our October 2026 crawl to answer the question a seller would ask about any language row: when a domain shows Dart, what is running there? Less than the category label suggests. Our crawl finds Dart on 5,483 domains, and 3,188 of them match a company record, a 58.14% match rate. On the web, nearly every one of those hits is a Flutter app. That makes the Dart row less a language census than a list of companies that built a browser app with Google's UI toolkit.

What the signal catches

A domain counts when a page sets Dart's session cookie, exposes one of the runtime globals that Dart's JavaScript compiler emits, or loads a script from a path segment named "dart". In practice the compiled file Flutter ships, main.dart.js, is what turns up (our technology detection methods post explains how such rules are matched). 5,220 of the 5,483 domains (95.2%) also load Flutter's web engine.

The path-segment clause catches things that aren't Dart, and a crawl always carries some dead domains, so before writing this I fetched every one of the 5,752 domains that passed our title filter on 16 October. I removed 269: 148 that no longer resolved in DNS, 44 parked or placeholder pages, 42 gambling lobbies (22 "KWG Game" lottery sites and 8 "FYT" betting sites among them) and 35 false matches, mostly WordPress themes, a Drupal ad module and a code editor's syntax file that happen to have "dart" in a path. The How We Counted note at the foot of the page has the full split. Of the 5,483 left, 5,208 served a Flutter loader or compiled Dart file when I fetched them.

Sales signal: treat a Dart hit as "this company ships a Flutter web app". The detection URL tells you which app, and it is rarely the homepage.

Growth trajectory

The chart has a single point, 5,483 domains in October 2026, because October is the first month counted after the cleaning. I wouldn't read growth into the uncleaned months before it either. The set of domains we crawl turns over every month, with dead sites dropping out and newly found ones added, and our detection signals have widened over the same period, so most of any earlier rise was ours. Since we began tracking Dart on 16 March 2026, 1,036 domains have dropped it on at least one hostname, and when I checked in mid-October 59 of those still ran it on another hostname.

"Dart on the web is Flutter on a subdomain. Of the 50 companies we list, 47 run it on an app, portal or login host, and their main site is built with something else." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: size the market at about 5,500 domains. The opportunity is in what these apps need around them, not in a fast-growing install base.

Who the customers are

63.53% of matched companies with a known size have 1 to 10 employees and 20.93% have 11 to 50. Age points the same way: 50.24% were founded in the 2020s and 32.93% in the 2010s. That reads as startups building their product in Flutter. The large-company tail is different. 70 companies have more than 1,000 staff (47 at 1,001 to 5,000, 10 at 5,001 to 10,000 and 13 above that), and the ones I opened each run one customer-facing app: OTP Bank's SingleMarket portal, Vodafone Idea's Vi Finance loan app, Hero MotoCorp's application form, Tata Communications' career portal, Schunk's Control Center.

Dart's own Who uses Dart page names Google teams (Play Console, Ads, Assistant), Workiva and Wrike. Our crawl confirms Wrike, whose sign-in page loads a compiled main.dart.js, and Google's Ads Transparency Center. Much of what that page lists sits behind logins or inside mobile apps, where a crawl can't see it.

Sales signal: at enterprises, the buyer is the team that owns the app, usually digital channels or customer self-service. Sell to that team, not to central IT.

Industry and geography

Software Development (12.46%), Technology, Information and Internet (9.04%) and IT Services and IT Consulting (6.54%) add up to 28.04% of matched companies. Then comes Financial Services at 5.33%, and the named list leans harder that way than the chart: banks (OTP, CIB, Nations Trust), insurers (Pacífico Seguros, Generali Central, CIC, King Price), brokers (Geojit, Ventura Securities) and lenders (GoodLeap). Geography has one surprise. The United States leads with 521 of the 3,188 matched companies, but India is second with 358, ahead of Brazil (213), Germany (146), France (119) and the United Kingdom (114).

Sales signal: Indian and Latin American financial firms are the clearest enterprise pocket. They build customer apps in Flutter and need the same things every regulated app needs: identity checks, document capture, app security and analytics.

Switching: what the data can and can't say

We publish no migration table for Dart, and that's deliberate. Languages don't replace each other the way vendors do, and the overlaps we see are a Flutter front end sitting on a server stack. 509 Dart domains run PHP today, out of 735 that ever had both. Java is on 32 (36 ever), Python on 6 (10 ever) and Perl on 1 (3 ever). Those are domains running both today, not companies moving between them.

"When a bank or an insurer adds Dart, it hasn't left anything. It has added one Flutter app beside the stack it already had." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: don't pitch a Dart list as "companies leaving PHP". Pitch it as companies that run a customer-facing app and have to secure, test and measure it.

The stack around it

Percentages here are of the 5,483 clean live domains. Cloudflare is in front of 33.1%. jsDelivr (22.63%), cdnjs (15.56%) and unpkg (10.3%) look like front-end habits but are often Flutter plugins loading their web helpers: in the 16 October fetch, 313 of these domains pulled PDF.js from jsDelivr, 168 Cropper.js from cdnjs, and others loaded hls.js, Google Maps and QR-scanning libraries. Nginx (19.93%) and Apache (12.11%) serve the files. WordPress (16.74%) and Elementor (8.72%) usually sit on the marketing homepage, not the app. Next.js shows on 8.41%.

Sales signal: the plugin libraries tell you what each app does. PDF.js means document viewing, Cropper.js means profile or ID photo upload, QR libraries mean scanning. Those are better qualifiers than the language itself.

Key takeaways

• Dart's web footprint is Flutter: 95.2% of the 5,483 domains load Flutter's engine.
• About 5,500 domains after removing 269 dead, gambling and falsely matched ones.
• A startup-heavy base (63.53% at 1 to 10 staff) with a real enterprise tail of 70 companies above 1,000 staff.
• Financial services and India stand out among the named companies.
• The loose path rule mismatched 35 domains, 0.61% of the 5,752 we fetched, and they're out of the count.

Sales applications

Outreach template: "I noticed your team runs its customer portal as a Flutter web app at [detection URL]. Teams that ship Flutter to the browser usually hit [your product's problem] next. Worth comparing notes?"

Targeting: filter Dart domains by company size above 200 and Financial Services, Banking or Insurance, then sort by the detection URL's subdomain (app., portal., my.) to find the customer-facing apps.

Competitive angle: if you sell rebuilds or a low-code builder, look at the domains that dropped Dart since March and kept no Dart on any hostname. Some rebuilt, some shut down, so check the live site before you call.

The full list of Dart domains, with company size, industry and the URL where we saw each app, is on TechnologyChecker.io: 5,483 domains and 3,188 matched companies from our October 2026 crawl.