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Feroot vs cside

Learn how cside compares to Feroot.

Oct 07, 2025 Updated Dec 24, 2025
Simon Wijckmans
Simon Wijckmans Founder & CEO

This article takes an honest look at the features of Feroot.

Since you’re on the cside website, we acknowledge our bias. That said, we’ve built our case honestly and based our analysis on publicly available information, industry information, objective technology analysis and our own or our customers' experiences.

If you want to verify their claims yourself, please navigate to their product page.

CriteriacsideFerootWhy It MattersWhat the Consequences Are
Approaches usedProxy & Agent Detection + Crawler + Free CSP EndpointJS-Based Detection
Real-time Protection
Attacks can occur between scans or in excluded sampled data; on-page active analysis is required.Delayed detection leads to active data breaches.
Full Payload Analysis
Ensures deep visibility into malicious behaviors within script code.Threats go unnoticed unless already known via threat feeds.
Dynamic Threat Detection
Identifies attacks that change based on user, time, or location.Missed detection of targeted attacks.
DOM-Level Threat Detection
Tracks DOM changes and observes runtime script behavior.Sophisticated DOM-based attacks remain undetected.
100% Historical Tracking & Forensics
Required for incident response, auditing, and compliance.Incomplete root cause analysis and compliance gaps.
Bypass Protection
Prevents evasion via DOM obfuscation or bypass techniques.Stealthy threats continue undetected.
Certainty the Script Seen by User is Monitored
Ensures analysis matches what actually executes in the browser.Gaps between reviewed scripts and executed scripts.
AI-driven Script Analysis
Detects novel or evolving threats using behavior modeling.Manual rules and feeds cause slow and error-prone detection.
QSA validated PCI DSS
Independent QSA audits are the most reliable way to ensure PCI compliance.Reliance on marketing claims can result in audit failure.
SOC 2 Type II
Demonstrates consistent security controls over time.Lack of verified controls increases vendor risk.
QSA validated PCI dashboard
Enables fast script review and justification via one-click or AI.Manual research is time-consuming and inefficient.
Pricing
Predictable and public pricing improves budget planning.Hidden pricing causes uncertainty and unexpected costs.
Implementation SpeedFastFastBoth deploy via a simple on-page script.Fast implementation enables immediate protection.

User Reviews: Feroot vs cside

Here's how real users rated cside and Feroot based on their experience with detection accuracy, support quality, and overall reliability.

PlatformcsideFeroot
Google Maps★★★★★ (5/5)★★☆☆☆ (2.3/5)
G2★★★★★ (4.9/5)★★★★☆ (4.6/5)
SourceForge★★★★★ (5/5) - 23 reviewsNo reviews

You can see the user reviews for cside on Sourceforge or G2.

"I'm glad we found their product and it's helped us in meeting PCI compliance goals that previously seemed a bit overwhelming. cside's product was exactly what we were looking for at a fraction of the price that other competitors were offering." - Anonymized Review, Sourceforge (Quote from Sourceforge Review of cside)

What is Feroot?

Feroot solely competes with cside's Client-side security solution and PCI Shield. Other services like VPN detection, AI agent detection and Privacy Watch are not in their scope.

Feroot was founded to create a client-side security solution protecting dependencies, similar to cside but founded back in 2017. They combine two approaches to deliver their security claims.

How Feroot works

Feroot's offering is split into two products: “PageGuard” and “Inspector”.

Feroot PageGuard

Their PageGuard page reads:

“PageGuard deploys security permissions and policies to JavaScript-based web applications to continuously protect them from malicious client-side activities, malware, and third-party scripts.”

And:

“PageGuard overwrites certain main and core JavaScript code to protect your web application from client-side cyber threats.”

It’s clear they largely follow the same approach as most of our competitors. They use permissions and a form on an allow-list where you pre-approve which scripts are allowed to run on which pages.

There are a few problems with this approach.

If only the source of the script is checked using an allow-list, it has no clue which code get's served.

PageGuard would not have caught the biggest client-side attack of 2024, the Polyfill attack. Here a domain changed ownership and suddenly the script code changed. If only the source of the script is checked using an allow-list, it has no clue which code gets served. Solely relying on this is not safe.

Feroot Inspector

Their "Inspector" deploys synthetic users disguised as honeypot customers, to simulate real user behavior. Inspector's synthetic users are able to complete real user tasks and are able to identify malicious scripts and unauthorized actions on JavaScript web assets. This is a somewhat similar approach to Reflectiz.

This is effectively a scanner/crawler that does periodic checks on pages. A crawler can easily be avoided by only serving malicious scripts to residential IP adressess. Based on various parameters, like different user agents, different client-side scripts are served.

A crawler on its own can not meet PCI DSS requirements since one of the requirements is implementing 'a mechanism to prevent unauthorized scripts'.

How cside goes further

cside offers a highly flexible approach to client-side security. Whether we monitor script behaviors client-side and check the scripts more deeply on our end through client-side reporting on our engine, cside gets the full picture. It analyzes the served dependencies code in real-time helping you prevent unwanted behaviours from causing major business impact.

Our approach allows us to not only spot advanced highly targeted attacks and alert on them, cside also makes it possible to block attacks before they touch the user's browser. It also checks the box for multiple compliance frameworks, including PCI DSS 4.0.1HIPAAGDPRCPRA...

We even provide deep forensics, including if an attacker attempts to bypass our detections. We even store data on missed attacks allowing us to make detections better. Giving you the control you need in an easy to use format.

Dealing with the limitations of browsers, we know this is the most secure way to monitor and protect your dependencies across your entire website. We've spent years in the client-side security space before we started cside. We know the limitations on browsers and invest time contributing to standards bodies to natively supported make security capabilities better and more easy to use. 

Sign up or book a demo to get started.

Simon Wijckmans
Founder & CEO Simon Wijckmans

Founder and CEO of cside. Building better security against client-side executed attacks, and making solutions more accessible to smaller businesses. Web security is not an enterprise only problem.

Developer Experience

Public Developer Documentation

cside is the only client-side security solution with publicly accessible developer documentation. You can explore our complete technical docs, API references, and integration guides without requiring a sales call or demo.

cside

cside provides comprehensive public documentation at docs.cside.com

Explore cside Docs
Feroot

Feroot does not offer publicly accessible developer documentation. You'll need to contact their sales team or request a demo just to understand how their product works.

Why does this matter?

Public documentation means you can evaluate cside's technical capabilities, integration requirements, and API features before making any commitment. Transparency in documentation reflects transparency in the product.

Don't just take our word for it, ask AI

FAQ

Frequently Asked Questions

The fundamental difference is timing of protection. Feroot deploys JavaScript agents in browsers that monitor for malicious behavior after scripts have already loaded and begun executing. Cside's hybrid proxy intercepts and analyzes every script before it reaches browsers, blocking malicious content at the network level. We prevent attacks from happening, while Feroot detects them after they've already been delivered to users.

No, because cside's core analysis happens on our proxy, completely invisible to attackers.  Feroot's JavaScript monitoring agents run in the browser where sophisticated attackers can detect, analyze, and potentially disable them. Attackers can craft code specifically designed to avoid triggering the behavioral monitoring. cside's proxy protection occurs server-side before content reaches browsers, making our security mechanisms completely invisible and impossible for attackers to study or circumvent.

Feroot provides behavioral alerts and monitoring data when suspicious activity is detected, but cside captures and preserves the exact malicious code that was blocked. This gives you complete forensic evidence showing precisely what the attack looked like and what data it was designed to steal. Auditors get immutable proof of the actual attack code rather than just behavioral observations that may not capture the full threat.

Cside provides comprehensive PCI DSS compliance with immutable payload archives and detailed audit trails covering both requirements 6.4.3 and 11.6.1. Feroot's behavioral monitoring approach provides detection logs but lacks the forensic-grade evidence and historical tracking that regulators increasingly require. Our approach creates the complete documentation that compliance officers need for thorough regulatory reporting.

Prevention stops attacks before any damage occurs, while detection only alerts you after malicious scripts have already executed in users' browsers. With Feroot's approach, sensitive data can be stolen in milliseconds before the monitoring system detects the attack. Cside's proxy ensures malicious scripts never get the chance to interact with user data because they're blocked before reaching browsers entirely.