Antoine Vastel is joining Castle as Head of Research
Bot detection is broken. Attackers have moved far beyond basic bot scripts—they’re leveraging AI, residential proxies, and sophisticated
Johan Brissmyr
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Fixing the blind spots in fraud prevention
Fraud prevention fails when you can’t see what’s happening on your platform. Most companies rely on basic fraud
8 Common Types of Account Abuse
Leading platforms like Canva, Atlassian, Figma, Notion, and Dropbox have completely transformed the modern workspace. They have brought productivity to
Castle & Twilio Segment – Instant Account Defense
Securing apps and users from account abuse has long been a resource-draining challenge for security and fraud teams, irrespective of
Industry
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How to Prevent Account Sharing Like Netflix
Account sharing is a form of account abuse that needs to be detected with more sophistication than just a one-time check during signup or login. Plus, there's no strict rule on how many accounts are okay to share—it's all up to your service's policies
Industry
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Which CAPTCHA(s) Should I Use?
As a developer encountering your first wave of bots trying to register or log into your application, which CAPTCHA should you opt for?
The Different Forms of Online Abuse
Fighting fraud is serious business for companies, even when they have clear rules and steps to follow. However, its evil
From Spam to Scams: How to Handle Fraud vs. Abuse
In the early stages of a startup, your primary focus is often on growth and development. Goals are set around
7 Fraud Prevention Rules Using Device Fingerprinting
In a previous article, 9 Device Fingerprinting Solutions for Developers, I outlined a set of open source and commercial solutions
11 Ways to Pinpoint a User's True Location
Hi 👋 – I'm the founder of Castle, a developer-first fraud prevention platform that helps you automatically collect and analyze
Industry
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9 Device Fingerprinting Solutions for Developers
As the availability of unique IPs and user agents wanes and cookie reliability remains half-baked at best, device fingerprinting has emerged as a serious contender in the battle against online fraud and abuse.
7 Proxy Piercing Techniques: What Works in 2023?
Introduction With the rise of online tracking, proxy and VPN services have become a popular way to protect people'