Companies Using FingerprintJS

We detect FingerprintJS on 74,533 domains, including Infosys Limited, Siemens AG, Upwork Enterprise. A detection means the technology is present on that domain, which for large organisations is often a single storefront or subdomain rather than a company-wide deployment. Among domains we matched to a company with a resolved industry, the most common is Real Estate (11.44%).

We detect 74,533 domains running FingerprintJS across our monthly crawl of live business domains. Company data could be matched for 29,621 of them (39.7%), and every company-size, industry and country breakdown on this page describes that matched subset rather than the full detected base. A further 17,073 domains carried a FingerprintJS detection previously and no longer do.

FingerprintJS holds 25.81% of the Visitor Identification category, ranking #1. This is a share of the domains we detect running a platform in this category — not a share of all websites, and not a share of spending — so it is not directly comparable to figures published on other denominators.

The top alternatives to FingerprintJS include ipapi.co (14.42% market share), Leadfeeder (12.57% market share), ip-api (10.27% market share), Zoominfo (10.13% market share) — measured as a share of the domains we detect running a platform in this category.

United States leads with 12,245 matched FingerprintJS domains, followed by Poland (2,235), United Kingdom (2,127), France (1,077), Germany (1,075). These are counts within the 29,621 domains we could match to a company record, not the full detected base.

The most common company size is 1-10 employees, representing 55.34% of the FingerprintJS domains we could match to a company record and size — a subset of 29,621 matched companies, not of all 74,533 detected domains. This is followed by 11-50 employees (24.84%) and 51-200 employees (11.81%).

Among the FingerprintJS domains we could match to a company with a known founding date, the largest group was founded in the 2010s (38.26%), followed by the 2000s (18.88%). That matched subset is drawn from 29,621 companies and is not representative of all 74,533 detected domains. This suggests FingerprintJS is most popular among relatively young companies.

The ideal FingerprintJS customer is: Company Size: 1-10 employees, Location: US, UK, or France, Industry: Retail, Software, or Technology, Founded: 2010-2019, Company Age: 5-15 years old — based on our analysis of 29,621 enriched companies at TechnologyChecker.io.

FingerprintJS ranks #1 in our Visitor Identification category with a 25.81% share across 74,533 active domains, and G2 reviewers rate it strongly for ease of use (131 mentions) and setup (99 mentions). The main reliability criticism in reviews is inaccuracy (31 mentions), specifically false positives that flag legitimate users. In practice about a third of FingerprintJS domains also run Cloudflare Bot Management, reCAPTCHA, or Turnstile, which is how most teams handle that: device identity as one layer of several rather than a single verdict.

Browser fingerprinting is used across many industries. Our data shows real estate (11.44%), retail (8.42%), and motor vehicle manufacturing (4.55%) as the top verticals for FingerprintJS adoption — all three are high-fraud submission surfaces. Enterprise deployments sit on account and login flows specifically: Chase on autopreferred.chase.com, The Hartford on account.thehartford.com, Baidu on passport.baidu.com, H&R Block on login.taxes.hrblock.com, and Bank Alfalah on its transaction portal.

FingerprintJS queries 100+ browser attributes (canvas rendering, audio context, installed fonts, WebGL data, screen resolution, and more) to compute a stable hashed visitor identifier. This ID persists across sessions even when cookies are cleared. It's used for fraud prevention, returning visitor recognition, and multi-accounting detection. ZBD, for example, cut multi-accounting by 95% using it. The open-source version runs entirely client-side in the browser.

No browser is 100% untraceable. Tor Browser comes closest by standardizing browser attributes to make fingerprints look identical across users. Brave and Firefox with strict privacy settings also resist fingerprinting. However, advanced techniques can still extract partial identifiers. FingerprintJS claims 99.5% accuracy on standard browsers, though privacy-focused browsers significantly reduce that effectiveness.

You can check for browser fingerprinting by inspecting page source code for scripts like FingerprintJS, using browser developer tools to monitor canvas and WebGL API calls, or visiting sites like EFF's Cover Your Tracks. TechnologyChecker.io also detects FingerprintJS on any website, currently tracking 74,533 active domains. Browser extensions like Privacy Badger can flag fingerprinting attempts in real time.

ClientJS is the closest open-source alternative, though far smaller. Commercially, the main option is Fingerprint Pro, the paid tier from the same vendor, which adds server-side identification and Smart Signals. The other technologies in our Visitor Identification category — ipapi.co, ip-api, Leadfeeder, Zoominfo — are not really alternatives: they resolve IP addresses to locations or companies rather than identifying devices, and 60-67% of domains that have ever shown FingerprintJS alongside them still show both.

FingerprintJS is the most widely adopted option, ranking #1 in our Visitor Identification category at 25.81% share, with 26,900+ GitHub stars and over 5 million monthly npm downloads. ClientJS is the main open-source alternative but has far less adoption. For commercial use, Fingerprint Pro adds server-side identification and Smart Signals from $99/mo. Note that most of the category above and below FingerprintJS does IP geolocation or B2B company resolution rather than device identification.

Browser fingerprinting legality varies by jurisdiction. Under GDPR (EU), fingerprinting requires user consent because it processes personal data. Under CCPA (California), users must be informed and given opt-out rights. FingerprintJS states it is SOC 2 Type II, GDPR, and CCPA compliant. However, implementing the library legally still requires your site to obtain proper consent and disclose fingerprinting in privacy policies.

FingerprintJS, the open-source library, is completely free with no API call limits. Fingerprint Pro has three tiers: Free ($0/mo, 1,000 API calls plus a 14-day Pro Plus trial), Pro Plus ($99/mo for 20K API calls, then $4 per additional 1,000), and Enterprise (custom pricing with 99.9% SLA). Pricing details per fingerprint.com/pricing. G2 reviewers cite pricing as their #1 complaint (60 mentions), noting costs rise quickly with scale.

The largest organisations we currently detect running FingerprintJS are Baidu (passport.baidu.com), Siemens (dex.siemens.com), Chase (autopreferred.chase.com), Ping An Insurance, The Hartford (account.thehartford.com), H&R Block (login.taxes.hrblock.com), Palo Alto Networks, EDF, Upwork, OpenText, and Bank Alfalah. The pattern is consistent: the library sits on login, account-opening, and transaction surfaces rather than marketing homepages. Note that Fingerprint Inc's own marketing names a number of other large brands we cannot confirm from our crawl — those are the vendor's claims, not our measurements.

Yes. The core FingerprintJS library is open-source and completely free with no API call limits. It runs client-side in the browser. The commercial Fingerprint Pro product also offers a free tier with 1,000 API calls per month. Paid plans (Pro Plus from $99/month) add server-side identification, webhooks, and higher accuracy. Our data shows 74,533 active domains running the library, most on the free open-source version.

Yes. FingerprintJS is open source under the MIT license, hosted on GitHub with over 26,900 stars and 2,500 forks. The open-source version runs entirely in the browser and provides client-side fingerprinting. Fingerprint Pro, the commercial product built by the same company (Fingerprint Inc.), adds server-side processing, higher accuracy (claimed 99.5%), and features like Smart Signals for VPN and bot detection.

The open-source FingerprintJS library provides browser-level accuracy that varies based on browser settings and privacy tools. The commercial Fingerprint Pro product claims 99.5% identification accuracy by combining client-side signals with server-side processing. G2 reviews include 31 mentions of inaccuracy, primarily around false positives. Accuracy drops significantly on privacy-focused browsers like Tor, Brave, and Firefox with enhanced tracking protection.

Real Estate leads at 11.44%, followed by Retail (8.42%) and Motor Vehicle Manufacturing (4.55%), based on our analysis of 29,621 enriched companies at TechnologyChecker.io. That top three is a fraud-surface ranking rather than a technology one: property enquiry forms, retail checkout, and dealership lead capture are three of the most abused submission points on the consumer web. No other vertical exceeds 3%.

FingerprintJS is the open-source browser library, free and MIT-licensed, running client-side only. Fingerprint Pro is the commercial product from the same vendor, adding server-side identification, Smart Signals for VPN and bot detection, and a much higher accuracy claim. Our 74,533 detected domains are overwhelmingly the open-source library. Pricing is the most common G2 complaint (60 mentions), which is worth reading alongside our churn figure: 17,073 domains have dropped the library since March 2026, and an open-source component is cheap to remove.