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About

ThumbmarkJS is a fair, privacy-friendly fingerprinting library built by developers for developers. Offered under an MIT license, it can be installed via NPM or loaded from jsDelivr, and with just a few lines of JavaScript, importing the UMD bundle and calling tm.get(), it returns a consistent 32-character thumbmark fingerprint. For small projects requiring higher accuracy, a free API version is available, while the Pro version scales indefinitely and cost-efficiently for large-scale applications. Without complex setup or invasive tracking, ThumbmarkJS has been integrated into over 60,000 websites, handling more than 1 billion identifications and 200 thousand downloads per month. It is free, open source, and has been designed as an alternative to FingerprintJS. It generates distinct, persistent device fingerprints using web APIs like canvas, audio, fonts, WebGL, and more, enabling identification of browsers across sessions.

About

Fingerprint is a device intelligence platform that works across web and mobile applications to identify every visitor with industry-leading accuracy, even when they are anonymous. It helps businesses stop fraud, detect bots and AI agents, reduce friction for trusted users, and build safer, more seamless products. It recognizes returning browsers and mobile devices without relying on cookies or IP addresses, assigning each visitor a persistent visitor ID that remains stable even across incognito mode, VPN usage, cleared cookies, and tampered devices. Fingerprint combines the original fingerprinting library with more than 100 signals developed by its research team, including VPN detection, IP geolocation, high-activity device detection, raw device attributes, IP blocklist matching, geolocation spoofing, browser bot detection, rooted device detection, browser tampering detection, and other Smart Signals.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Web developers and security engineers requiring a solution for user identification without compromising privacy

Audience

Businesses and security teams that need accurate visitor identification and device intelligence to prevent abuse while keeping legitimate users moving smoothly

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

15€ per month
Free plan includes 1K API calls per month. Pro plan includes 15K API calls per month for 15€ / month, then 1€ per additional 1K API calls. Enterprise plan with custom pricing is available at +1M API calls per month.
Free Version Supported
Free Trial Not Supported

Pricing

Free
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 4.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • I really like the ease of integration with this. It's really straight forward and does exactly what it promises. The dashboard is informative and you can see exactly how many requests have been made. I also like the webhook functionality.

Cons

  • It seems like the system is lacking a bit in detecting VPN connections and private browsing. Some VPN connections are not being detected, and private browsing is not something that we were able to get through this either, but we combined another service with this to get the full package.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

ThumbmarkJS
Finland
www.thumbmarkjs.com

Company Information

fingerprint.dev
United States
fingerprint.dev/

Alternatives

Alternatives

GeoComply Core

GeoComply Core

GeoComply

Categories

Categories

Integrations

Angular Supported
JavaScript Not Supported
Preact Supported
React Supported
VUE Supported

Integrations

Angular Not Supported
JavaScript Supported
Preact Not Supported
React Not Supported
VUE Not Supported
Claim ThumbmarkJS and update features and information
Claim ThumbmarkJS and update features and information
Claim fingerprint.dev and update features and information
Claim fingerprint.dev and update features and information