Stop 3rd Party Data Leaks
Prevent PII data leaks through malicious or mismanaged 3rd-party scripts that load on your website.
What Happens If Data Leaks Through 3rd-Party Scripts
Your users' email addresses, page views, and payment behavior can be siphoned off.
The impact of a data loss incident is hard to measure and can last for years. No-one wants to buy from a vendor that puts their data at risk, and showing best effort to prevent data loss does not suffice in the public eye.
Control which scripts access user data, and get alerted the moment behavior changes.
Leading companies trust cside
Built for security teams who need visibility inside the browser, cside defends against client-side attacks while supporting PCI DSS, GDPR, CCPA/CPRA, and HIPAA compliance. We help you secure the last mile of the web.
GDPR 
SOC 2 
PCI DSS FAQ
Frequently Asked Questions
We monitor every script running in the browser and log all access to sensitive data. We flag immediately any script that tries to access or send user data without context or consent.
Yes. cside lets you set policies instead of blocking a script entirely. You can allow your chat tool to load, but block it from reading email fields or tracking users pre-consent.
Non-malicious but unmanaged scripts cause most data leaks. Examples include analytics tags that read too much and pixels that were never updated for new privacy rules. We help you detect and correct this before it becomes a compliance issue.
No. cside loads separately and is designed for production environments. It works without causing latency or blocking rendering, and it caches static scripts to improve performance.
Eliminate your Client-side blindspot
Gain full visibility and control over every script delivered to your users to improve site security and performance.Start free, or try Business with a 14-day trial.
