Content
What Is Device Fingerprinting? (And Why It's Really Browser Fingerprinting)
Device fingerprinting explained honestly: how it works, how it differs from browser fingerprinting, and what it really can and can't identify.
Web Personalization Examples: Tactics That Work Even for Anonymous Visitors
Real web personalization examples for ecommerce, content, and SaaS — including tactics that work for anonymous visitors. See what drives engagement.
Browser Fingerprinting in JavaScript: A Developer's Implementation Guide
Implement browser fingerprinting in JavaScript: signals, working code, open-source vs API — and whether device fingerprinting in JS is possible.
Building a Metered Paywall: Enforcing Free-Article Limits Fairly
Learn to build a metered paywall that survives cookie clearing. A developer guide using browser fingerprinting to close the incognito bypass gap.
How to Reduce Shopping Cart Abandonment with Persistent Carts
Cut cart abandonment with proven checkout fixes plus persistent carts that restore anonymous shoppers' carts - no login required.
How to Prevent Credential Stuffing: A Developer's Playbook
Credential stuffing attacks exploit leaked passwords at scale. Learn how to layer bot detection, device fingerprinting, and rate limiting to stop them.
New Account Fraud Prevention: Stop Fake Signups
Learn how to detect and prevent new account fraud with browser fingerprinting. Practical guide to stopping fake signups, multi-accounting, and free trial abuse.
Web Scraping Prevention: Techniques That Actually Work
Robots.txt and IP blocks won't stop determined scrapers. This guide covers the layered techniques — including browser fingerprinting — that actually prevent web scraping.
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.
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.