Client-side intelligence is the full analysis of everything happening in users' browsers, not just security threats, but all behavioral patterns, data flows, and interactions. Current use cases include fraud detection through device fingerprinting, chargeback prevention, ad fraud protection, malware detection, privacy monitoring, compliance monitoring, and user behavior analysis. As web browsers become more sophisticated computing environments, client-side intelligence will become the foundation for understanding and protecting the entire user experience ecosystem.
cside now offers this as a dedicated Device Intelligence product, 250+ signals per session for fraud, bot, and AI-agent detection.
How do client-side attacks actually happen?
Compromising a third-party service your website relies on is one common way attackers get in.
Why can't traditional security tools detect client-side threats?
Firewalls, WAFs, and vulnerability scanners are traditional security tools used to protect your server, but they cannot see what's happening in your users' browsers.
What's the difference between client-side security and server-side security?
Server-side security protects your infrastructure, while client-side security focuses on where your application actually runs, inside your users' browsers.
What's the difference between client-side security and application security?
Client-side security is a critical subset of AppSec that focuses on protecting applications where they actually execute--in users' browsers.