A Buyer's Guide to PCI DSS 6.4.3 and 11.6.1 Compliance Solutions

Did you know that while most standard security tools monitor your server, they don’t track e-skimming (Magecart attacks) because these happen inside your customer’s web browser? This is why the PCI DSS Council added new requirements ( 6.4.3 and 11.6.1 ), making client-side script management mandatory. This means that businesses can no longer ignore third-party JavaScript (like chatbots, analytics trackers, and review widgets) running on their checkout page and possibly being open to malicious threat actors. However, choosing the best vendor for meeting PCI requirements 6.4.3 and 11.6.1 is not an easy choice. You want someone who offers the PCI service you need, who meets your budget, and has the technology to monitor your shopping cart for threats. This blog will address the main vendors (SecurityMetrics, Reflectiz, Jscrambler, c/side, and Source Defense), comparing their strengths and who they are best for, so you can make an informed decision. The Competitors At-A-Glance To help your readers understand how these tools operate, it's best to divide them by how they deploy: Agentless (External Scanners) vs. In-Browser (Active Injections). | Vendor | Deployment Type | Primary Strength | Best For | |----|----|----|----| | SecurityMetrics | Agentless (Synthetic User) | Simple compliance + integrated PCI auditing. | SMBs, Mid-Market, and Enterprise seeking fast compliance. | | Jscrambler | Hybrid (Agent + Agentless) | Security & active threat blocking. | High-volume enterprise / targets. | | Reflectiz | Agentless (Remote Crawler) | Multi-page monitoring | Mid-market to enterprise needing zero code change. | | c/side | In-Browser Agent | AI-driven autonomous script neutralization. | EV teams wanting proxy defense. | | Source Defense | In-Browser Tag | Real-time sandboxing of third-party script permissions. | Enterprise eCommerce. | Deep Dive: Product Breakdowns, Pros & Cons 1. SecurityMetrics: Shopping Cart Monitor SecurityMetrics approaches this problem through the lens of a compliance auditor. Their Shopping Cart Monitor uses patented Webpage Integrity Monitoring (WIM) to act as a "synthetic user" that automatically tests your checkout process and reports back. The Pros: Completely code-free. You simply give them your URL and they scan it from the outside. SecurityMetrics offers everything you need to reach PCI compliance, (QSAs, PCI Audits, add-on security products, etc.), unlike other vendors on this list. If you already use SecurityMetrics for your ASV scans or SAQ portal, your compliance documentation is perfectly centralized. SecurityMetrics also offers managed solutions for mid-market and enterprise customers seeking a more hands-off approach to PCI compliance. The Cons: It is built for detection, not prevention. SCM operates on a snapshot-interval basis (e.g., daily scans). It will alert you after a script behaves maliciously, but it cannot actively block the threat while a customer is typing their card number. 2. Jscrambler: Webpage Integrity (WPI) Jscrambler focuses on client-side defense. They transitioned from protecting application source code to building an advanced runtime application self-protection (RASP) tool for browsers. The Pros: Real-time prevention. Jscrambler sits inside the customer’s browser. If an ad network or chatbot gets hijacked and tries to read data from a payment form field, Jscrambler identifies the unauthorized behavior and blocks it instantly. The Cons: It requires putting code on your site. The implementation requires developers, testing, and continuous maintenance to make sure Jscrambler doesn't accidentally block legitimate code updates. It is also significantly more expensive than standard scanning tools. 3. Reflectiz Reflectiz is the closest direct competitor to SecurityMetrics' style of deployment. It is a completely remote, agentless web exposure platform. The Pros: Code-Free setup that can be live within 24 hours. Reflectiz maps your entire web ecosystem, including difficult-to-track iframes. It features "Smart Approvals" that automate the manual workload of creating business justifications for PCI 6.4.3. The Cons: For Reflectiz’ code-free software to detect an e-skimmer on a payment page, it must successfully navigate modern, highly dynamic single-page applications (SPAs)—adding items to a cart, generating mock shipping addresses, and hitting the final checkout view. If the website's UI changes or an unexpected validation error occurs, the crawler can get stuck, creating unmonitored "dark corners" on the site. Relfectiz’ product is also vulnerable to anti-bot cloaking, meaning it can be bypassed by sophisticated e-skimmers. 4. c/side c/side is an AI-driven platform built explicitly for the modern web layer. It focuses on proxying and inspecting third-party scripts dynamically. The Pros: It uses AI to determine script intent on the fly and features active neutralization capabilities. It’s used by modern development teams because it focuses heavily on the speed of execution, ensuring security doesn't slow down page load times. The Cons: It requires a script/proxy setup on your site. As a newer player in the market compared to giants like SecurityMetrics, c/side lacks the broader compliance portal ecosystem (like handling your SAQ or network vulnerability scans). 5. Source Defense Source Defense takes a "Zero Trust" approach to JavaScript. Instead of just monitoring scripts, it places them in a virtual sandbox, dictating exactly what they are allowed to see and do. The Pros: It neutralizes threats at the source by utilizing "Vice" technology to stop third-party scripts from interacting with sensitive form fields entirely. It prevents data exfiltration even if a legitimate script is compromised. The Cons: Requires using a deployment tag on your web pages. Because it actively restricts script permissions, it requires thorough initial configuration to ensure important tools (like analytics) don't break. How To Choose Your Requirement 6.4.3 and 11.6.1 Vendor Choose SecurityMetrics if you are an SMB, Mid-Market, or Enterprise business whose main priority is achieving PCI 4.0.1 compliance easily, within a single, familiar compliance portal. SecurityMetrics is also a one-stop shop for PCI compliance, allowing users to start and validate their compliance with the use of a single vendor. Choose Reflectiz if you are a medium-to-large enterprise that wants advanced script visibility, iframe tracking, but your engineering team has strictly banned adding any more third-party code/agents to the website. Choose Jscrambler or Source Defense if you are a massive eCommerce player (thousands of daily transactions) for whom compliance is secondary to raw data protection. Choose c/side if you have an agile development team that wants cutting-edge, fast, AI-driven client-side defense designed specifically to handle modern malicious script injections without damaging site performance. \ :::tip Exclusive offer: Get 50% off Shopping Cart Monitor when you mention HackerNoon. Call 1-801-995-6855 or email us to get your discount. Offer expires June 30, 2026. ::: \ \ \n \