Content
Promo Code Abuse: How to Stop Users from Gaming Your Promotions
Promo code abuse erodes margins and corrupts acquisition data. Learn how multi-accounting works and how browser fingerprinting stops it.
How to Prevent Account Takeover Fraud: A Practical Playbook
A practical guide to account takeover fraud prevention for fraud and product teams — attack vectors, layered defenses, and device fingerprinting explained.
Cookieless Personalization: How to Tailor Experiences Without Cookies
Cookies are going away. Here's how to keep delivering personalized experiences using fingerprinting, first-party data, and zero-party data.
Bot Detection: A Developer's Guide to Identifying and Blocking Automated Traffic
How to block bad bots in production — signals that work, techniques with honest tradeoffs, and code you can ship.
Browser Fingerprinting Techniques: How Each Signal Works (With Code)
Learn how canvas, WebGL, audio, and TLS browser fingerprinting techniques work — with example JavaScript code
Providing high quality visitor identification at scale
How ThumbmarkJS scales indefinitely while maintaining high quality visitor identification.
Most of the value for a fraction of the cost
Why developers are switching to ThumbmarkJS over competitors.
ThumbmarkJS vs. FingerprintJS: The Best Alternative for 2026
Looking for a FingerprintJS alternative? This guide compares ThumbmarkJS vs. FingerprintJS on pricing, accuracy, and licensing to help you choose the best solution.
Top 4 free browser fingerprinting libraries for 2025
A comprehensive list of the best free browser fingerprinting libraries in 2025.
How to Prevent New Account Fraud
Stop fake signups and users abusing your new account free trials.
Cross-Domain localStorage: How Browser Fingerprinting Enables Seamless Data Sharing
Discover how browser fingerprinting can create a cross-domain localStorage alternative, enabling secure data sharing between different websites without cookies or CORS restrictions.
What is Browser Fingerprinting? A Complete Guide to Digital Identity Tracking
Learn what browser fingerprinting is, how it works, and how ThumbmarkJS provides a powerful solution for visitor identification without cookies.