CSide vs Reflectiz: The Reality Check

CSide recently published a comparison page making bold claims about their proxy-based approach. As the industry leader in client-side security with more script detection capabilities than our competitors, we believe enterprises deserve the full picture when evaluating security solutions.

This page presents factual, evidence-based comparisons to help you make an informed decision about protecting your digital assets.

Reflectiz
c/side
Solution Type
Agentless
Proxy-based
Onboarding Time
✓ 24 hours
✗ Weeks
Implementation Complexity
✓ Zero code changes
✗ Proxy setup
Performance Impact
✓ Zero latency added
⚠ Proxy latency
Script Detection Rate
✓ Full browser visibility
⚠ Limited proxy visibility
On-Demand Blocking
✓ Blocking available
✓ Proxy-based blocking
Failure Mode
✓ No single point of failure
✗ Proxy is critical path
PCI DSS Dashboard
✓ Purpose-built for compliance
✓ QSA validated
Pricing Model
✓ Predictable per-website
⚠ Traffic-based pricing
iFrame Visibility
✓ Full iFrame monitoring
✗ No proxy iFrame visibility
User Data Privacy
✓ No access to user data
✗ Full access to user data
Attack Code Visibility
✓ Detection logic hidden
✗ Client-side code exposed
Analytics Impact
✓ Zero impact on analytics
✗ Affects analytics data
Downtime Risk
✓ No impact on site availability
✗ High availability is required

Trusted by top companies:

⚠️ Critical Issues with CSide’s Proxy Approach

1. Performance Degradation at Scale

Multiple industry reports confirm proxy architectures can add  latency, particularly for complex web applications with numerous third-party scripts. 

2. Massive Privacy & Data Exposure Risk

CSide can see your user data through their proxy – including personal information, payment details, and sensitive customer data. This creates an enormous privacy risk and compliance nightmare. You’re essentially giving a third-party vendor complete visibility into your customer interactions.

3. No iFrame Visibility – Critical Security Blind Spot

Through its proxy-based setup, CSide cannot monitor or protect content within iFrames – a massive security gap. Many payment processors, chat widgets, and third-party integrations use iframes. Attackers know this and specifically target iframe-based attacks that proxy-based CSide simply cannot detect or prevent. They may have an agentless solution to achieve this iframe visibility. 

4. 30% Traffic Blindness Due to Ad Blockers

Ad blockers can block up to 30% of web page components such as trackers. This means CSide most likely will detect less components than an agentless solution like Reflectiz.

5. Catastrophic Downtime Risk

Proxy-based solutions require high availability to avoid any downtime risk. It also require immense responsibility to maintain sufficient proxy settings throughout.  

6. Complex Implementation & Maintenance

Implementing a proxy requires infrastructure changes, SSL certificate management, DNS modifications, and ongoing maintenance. CSide’s “hybrid” approach, where some scripts are proxied and others aren’t, creates additional complexity and potential security gaps.

7. Data Integrity & Analytics Problems

Routing traffic through a proxy affects your analytics data. IP addresses, user locations, and traffic patterns all get distorted. Your marketing analytics, fraud detection systems, and business intelligence tools see CSide’s proxy IPs instead of real user data. This breaks attribution, skews metrics, and can cost millions in misdirected marketing spend.

8. Compliance and Legal Liability

Routing all user traffic through a third-party proxy raises significant privacy and compliance issues. Under GDPR and other data protection regulations, you’re adding another data processor to your chain, increasing compliance complexity and liability. CSide becomes a custodian of your customer data.

9. Browser Compatibility & Blocking Issues

The consequences of a proxy-based solution: Brave Shields [Brave browser’s built-in privacy and security feature that blocks ads] is blocking proxy.cside.dev, which CSide uses to proxy third-party JavaScript for security analysis. Cside don’t want you to know that so they removed the link, but we have the screenshot proof:
cside blocked

 

CSide is being flagged by browser security tools, which could impact their service delivery.

✓ Reflectiz’s Enterprise-Proven Advantages

Industry-Leading Detection with Zero Implementation

Reflectiz detects more scripts than any competitor on complex websites – without requiring a single line of code change. Our agentless approach means you get comprehensive visibility in hours, not months. We’ve proven this across thousands of enterprise deployments.

Advanced Deobfuscation Engine

Our proprietary deobfuscation technology is the most sophisticated in the industry, capable of analyzing even the most complex obfuscated malicious code. Unlike CSide’s basic LLM approach, our engine uses multi-layer analysis methods trained on millions of threat patterns, providing instant insights into sophisticated attack techniques.

On-Demand Script Blocking

When threats are detected, Reflectiz provides instant blocking capabilities without the complexity of proxy management. Our intelligent blocking system learns from your security team’s responses, automatically adjusting to your risk tolerance while maintaining site functionality.

True Real-Time Behavioral Analysis

Our behavioral analysis engine monitors actual script behaviors in real-world conditions across all user segments. We detect when scripts capture keystrokes, modify payment fields, or exfiltrate data to unauthorized endpoints – providing alerts your security team can act on immediately.

Zero Performance Impact

Because Reflectiz operates completely outside your traffic flow, there’s absolutely zero impact on your website’s performance. No added latency, no proxy bottlenecks, no SSL complications – just pure security intelligence without compromise.

⚠️Beware of Misleading Claims

CSide’s comparison page contains several inaccuracies about Reflectiz:

  • We DO provide real-time protection and blocking capabilities
  • We DO analyze full script payloads, not just domains
  • We DO offer comprehensive forensics and historical tracking
  • We DO detect DOM-level threats and sophisticated attacks
  • Our detection rates are HIGHER than proxy-based solutions

🚨Critical Security Gaps CSide Won’t Tell You

Before choosing CSide, understand these severe limitations:

  • ZERO iFrame Protection: Cannot see or protect payment widgets, chat systems, or any iFrame content with proxy-based solution. Remote solution can give you this visibility. 
  • Complete Data Exposure: CSide’s proxy can see your customer data including passwords, payment info, and PII
  • Analytics Affected: Proxy breaks your analytics, attribution, and fraud detection systems

Ask yourself: Can you afford these risks?

Frequently Asked Questions

Q: How does Reflectiz detect more scripts than CSide’s proxy?

Unlike embedded or proxy-based solution, Reflectiz advanced browser-based detection engine has no limitations — and uses multiple discovery methods including intelligent crawling with geo-targeting, device simulation, and behavioral pattern analysis. We detect scripts that only appear under specific conditions – something proxy-based solutions miss entirely. Independent testing shows we detect more scripts on complex websites.

Q: Can Reflectiz really block scripts without a proxy?

Yes. Reflectiz offers multiple blocking mechanisms that don’t require routing traffic through a proxy. Our solution integrates with your existing security infrastructure to provide instant blocking when threats are detected, without adding latency or complexity to your architecture.

Q: Why can’t CSide see iFrame content?

Proxy-based solutions like CSide operate at the network layer and cannot inspect content within iFrames due to browser security policies (same-origin policy). This is a fundamental limitation of their architecture. Reflectiz uses advanced browser-based detection that can monitor and analyze iFrame behavior, protecting payment widgets, chat systems, and other critical iFrame-based components. CSide may have an agentless solution, like Reflectiz, to help with this detection blind spot. 

Q: What are the privacy implications of routing traffic through CSide’s proxy?

Severe. CSide’s proxy can see your customer data – passwords, payment details, personal information, everything. You’re making them a custodian of your most sensitive data. If CSide gets breached, has a rogue employee, or has a bug, your customer data is at risk. Under GDPR and other regulations, you’re adding another data processor with full access to user data. Reflectiz never touches your user traffic or sees any customer data.

Q: Can attackers reverse-engineer CSide’s detection methods?

Absolutely. CSide’s detection logic runs in client-side JavaScript, fully visible to anyone who opens browser developer tools. Sophisticated attackers routinely reverse-engineer client-side security code to find bypasses. It’s security through obscurity at its worst. Reflectiz’s detection logic is server-side and completely invisible to attackers.

Q: How does CSide’s proxy affect analytics and fraud detection?

Proxies affect your analytics data. All traffic appears to come from CSide’s proxy IPs instead of real users. This breaks attribution, skews geographic data, interferes with fraud detection systems, and can cost millions in misdirected marketing spend. Your business intelligence becomes unreliable. Reflectiz has zero impact on your analytics or other systems.

Q: How quickly can Reflectiz be onboarded compared to CSide?

Reflectiz can be fully operational within 24 hours with zero code changes. CSide’s proxy architecture requires DNS changes, SSL certificate management, infrastructure modifications, and extensive testing. Enterprise CSide deployments typically take weeks, while Reflectiz starts immediately within 24 hours.

 

The Technical Reality: Why Proxies Fail at Scale

Independent security research consistently shows the limitations of proxy-based approaches:

  • Latency Impact: Studies show proxy architectures add 50-200ms of latency in production environments.
  • SSL Complexity: Managing SSL termination at the proxy layer introduces security vulnerabilities and operational overhead
  • Bypass Vulnerabilities: Attackers can detect and evade proxy IP ranges just as easily as they evade crawlers

🔒 The Privacy Nightmare: CSide Can See Everything

Your Customer Data Flows Through CSide’s Servers

Every proxy-based solution has the same fundamental flaw: some of your user traffic passes through their servers. This means CSide has visibility into:

  • ✗ Customer login credentials and passwords
  • ✗ Payment card details and transaction data
  • ✗ Personal identification information (PII)
  • ✗ Proprietary business data and customer interactions
  • ✗ Session tokens and authentication cookies
  • ✗ Form submissions and user inputs

Think about it: You’re essentially making CSide a man-in-the-middle for all your customer interactions. If they get breached, if they have a rogue employee, if they have a bug in their system – your customer data is at risk. Is that a risk you can afford to take?

Why Reflectiz Customers Don’t Switch

Zero Implementation Risk

Deploy in 24 hours without touching your infrastructure. No proxy setup, no SSL certificates, no DNS changes.

Superior Detection

Detect more scripts than any competitor. Our multi-dimensional analysis catches what proxies miss.

Enterprise Scale

Proven at Fortune 500 scale without performance degradation. No proxy bottlenecks, no latency concerns.

Instant Blocking

Block malicious scripts on-demand without proxy complexity. Intelligent, adaptive protection that learns from your team.

Best Deobfuscation

Industry-leading deobfuscation engine reveals even the most sophisticated attack techniques instantly.

Compliance Ready

Purpose-built for PCI DSS 4.0, GDPR, and enterprise compliance without adding complexity to your architecture.

The Bottom Line

In our view, CSide’s proxy approach represents outdated thinking in client-side security. While they focus on complex proxy architectures that add latency and create single points of failure, Reflectiz has built the future: agentless, intelligent security that deploys instantly and scales infinitely.

Don’t let marketing claims fool you. When Fortune 500 companies need real client-side security without compromising performance or adding complexity, they choose Reflectiz. Join thousands of security teams who’ve made the smart choice.

The Reflectiz Proactive Approach

Go beyond client-side security and vulnerability patching by taking a proactive approach to combat sophisticated web threats, gain deeper visibility, and mitigate security and privacy risks before they strike.

Agentless monitoring solution

Effortlessly launch with no code implementation and zero impact on website performance

Quick time to value

Start seeing value from day one with a vast intelligence database that identifies and prevents risks on your website from the start.

Robust detection capabilities

Reflectiz detects more scripts on complex websites, compared to c/side.

Reflectiz Provides Full-Suite Coverage of Web Threats

Web Skimming and Magecart

Secure your website against next generation client-side attacks before the damage is done

Read more
PCI Compliance

Avoid costly mistakes with Reflectiz compliance solution for PCI-DSS 4.0

Read more
Tag Manager Security

Scale up with peace of mind by securing the implementation of tags outside of the security department

Read more
Website Privacy Enforcement

Discover the behavior of third-party vendors and components, and adjust your policies to ensure you align with tight compliance regulations

Read more
Web Asset Management

Govern all web assets from one centralized dashboard

Read more
Web Supply Chain Risks

Prevent vulnerabilities in your web app supply chain, and ensure all is working as intended

Read more

Here is what our clients had to say about us

When I got to BigCommerce a year and a half ago, Magecart had been one of my primary concerns. Today it’s one of my least concerns… I’d say we’ve lucked out with the right people. Our partnership with Reflectiz has been awesome… Not just because of the tech, but because of the people. You need effort and care on both sides to make it successful

Dan Holden
VP, Cyber Security

"With Reflectiz, it’s almost like having an additional security analyst on site. I now have peace of mind that there is a system constantly watching for anything abnormal on the third-party website. This solution plugged into my existing security setup with ease and was ready to go. It also revealed hidden supply chain risks that I didn’t know were there."

Graham Peck
Head of IT & Security, Leeds United

Reflectiz gives us the visibility we lacked. If a Facebook pixel suddenly starts doing something different, we know. That kind of behaviour protection is what really sets it apart from the other tools we evaluated. If you’re struggling with how to meet the new PCI DSS v4.0.1 on-page script monitoring requirements, Reflectiz is the answer. It removes the blind spots without disrupting your platforms or teams.

Keyur Lavingia
Head of Security, Village Roadshow

Being responsible for thousands of ecommerce stores used by millions of shoppers, I have to make sure we are well secured and have the ability to rapidly address dynamic changes. The Reflectiz solution offers quick deployment and for me, as a CISO, it also lets me sleep well at night.

Lance Wright
Information Security Executive

Reflectiz platform is great and allow us to get complete visibility of third-party risks which helps us to reduce our attack surface and security risks.

Shay S.
Cyber Operation

Great product that allow us to get full visibility on our third-party risks, and create an added value to the organization.

Eli Petel Assuta
Eli Petel
CISO in the medical industry

"With Reflectiz, meeting PCI requirements is effortless. All the necessary data is ready to download, so we can quickly generate reports and submit them to the QSA without the hassle of manual preparation."

Jack Davies
Cyber Security Director, Aberystwyth University