Jscrambler alternatives for protecting the payment page (2026)
By Laís Peixoto
Growth Marketer, Proteside
Published
Teams looking at Jscrambler alternatives find three families. On-page agents such as Feroot and c/side inventory and block scripts in real sessions. External monitors such as Reflectiz and SecurityMetrics visit the page from outside, with no code on the site. CDN modules such as Cloudflare Client-Side Security (formerly Page Shield) act from the proxy. Proteside adds a fourth check: the payment shown to the shopper.
Why teams evaluate other options
The checkout takes more than cards
UPI, PromptPay, PayNow, Pix, boleto and stablecoins have no form to watch. The fraud is a swapped payee on screen, and catching it means comparing what is displayed with what the merchant issued.
Real sessions on every page
Jscrambler's public guide offers an agentless mode with a synthetic user. Teams that want to observe each shopper's browser, on each page, look for a tool that does so by default.
Install without a project
The onboarding Jscrambler describes includes weekly meetings, form mapping and quarterly allow-list reviews. Small and mid-sized operations prefer one line of code that protects and produces the report the same day.
The short list
| Option | How it works | Makes sense for | Comparison |
|---|---|---|---|
| Proteside | A script on the payment page checks every QR code, payment key, bank slip line, wallet address and card field against what your server issued, and blocks the swap before confirmation. | Merchants paid through instant rails such as UPI, PromptPay, PayNow or Pix, by card, by bank slip or in stablecoins, who need protection and PCI DSS evidence from a single install. | Jscrambler vs Proteside |
| Feroot PaymentGuard e DXSecure | Inventories the scripts on payment pages, records justifications and integrity, and alerts on changes to content and headers; runtime policy enforcement is described as optional. | Card-centric operations that need script governance across websites and mobile apps, with a report for the assessor. | Feroot vs Proteside |
| c/side Script Security | A snippet on the page watches third-party scripts in real sessions, keeps a history of what each script loaded and blocks by combining CSP with its own rules, with no reverse proxy and no DNS change. | Teams that want detailed visibility into the behavior of every third-party script, with compliance dashboards and alerts in chat tools. | c/side vs Proteside |
| Reflectiz PCI Module | An automated browser visits payment pages from outside, on a schedule, with no code on the site; blocking, when triggered in the interface, injects a CSP policy that excludes a domain. | Teams that cannot or prefer not to place a script on the page and accept detection with human review. | Reflectiz vs Proteside |
| SecurityMetrics Shopping Cart Monitor | Scans the payment page from outside, at intervals, simulating the checkout, and alerts on new scripts and changes; the company itself describes the product as a detection tool and says it was not built to prevent. | Merchants already using the SecurityMetrics PCI portal (questionnaires, ASV scans) who want evidence for requirements 6.4.3 and 11.6.1 in the same place. | SecurityMetrics vs Proteside |
| Cloudflare Client-Side Security (antes Page Shield) | From the proxy, Cloudflare adds a report-only CSP header to a sample of pages and builds the inventory from browser reports; blocking happens through allow rules in the advanced tier. | Sites already behind Cloudflare that want script monitoring with nothing to install. | Cloudflare Page Shield vs Proteside |
Choose the category before the vendor
Pick the category before the vendor. On-page agents and CDN modules control what runs in the browser and produce the evidence for requirement 6.4.3; they differ in who triggers the block and which sessions are observed. External monitors need no code on the site and, by their own description, work through scheduled visits. None of the three families describes checking whether the QR code, account identifier or wallet address on screen is the one the merchant issued.
Proteside starts from that check, the integrity of the payment moment, and includes the script inventory and change history for requirements 6.4.3 and 11.6.1. A team that also needs to protect its own application code still needs an obfuscation tool such as Jscrambler's Code Integrity; that scope sits outside Proteside.
The options in detail
Proteside
Proteside records what is legitimate on each payment page (the details of each charge, the form fields, the authorized scripts) and continuously verifies, in the payer's browser, what is displayed, what is copied and where the data goes. When it detects a mismatch, it stops the action before the payment is confirmed and logs the attempt.
The script inventory and the change history form the evidence for PCI DSS requirements 6.4.3 and 11.6.1. Installation is one line of code on any e-commerce platform, or a single integration for platforms and payment providers, with a dashboard, API and alerts.
Proteside is the right choice when: Choose Proteside when your checkout is paid through instant rails, bank slips or stablecoins as well as cards, when you need the payee swap blocked in real sessions, or when you want protection and PCI DSS evidence without changing your CDN.
Feroot PaymentGuard e DXSecure
Feroot centers its offer on compliance: PaymentGuard covers requirements 6.4.3 and 11.6.1 with script inventory, justifications, integrity checks and an evidence report for the QSA. Public documentation cites integrations with alerting and operations tools, and coverage of iOS and Android apps alongside websites.
The point to watch for anyone paid outside cards is scope: the public material speaks of scripts and card data, with no mention of QR codes, payment keys, boleto (Brazilian bank slip) or crypto wallets. For those payment methods, a payee swap sits outside what the tool describes checking.
Feroot is the right choice when: your priority is script governance and PCI DSS evidence across websites and mobile apps, and your checkout is paid mostly by card.
c/side Script Security
c/side defines itself as a client-side security platform. Public material describes an inventory with the content history of each script, a vendor graph, alerts, dashboards for requirements 6.4.3 and 11.6.1 and an endpoint for receiving CSP reports.
Its public page on crypto cites the swap of a wallet address copied to the clipboard, which brings it close to the problem Proteside solves. Pix, boleto (Brazilian bank slip) and the QR codes of instant payment rails such as UPI or PromptPay do not appear in the public documentation we consulted.
c/side is the right choice when: you want the detail of each third-party script's behavior and a crypto address swap is already your main concern outside cards.
Reflectiz PCI Module
Reflectiz describes its own approach as agentless: a sandboxed browser simulates the user journey, inventories scripts (including inside iframes), monitors headers for requirement 11.6.1 and exports evidence for the QSA. The platform also covers privacy and offensive testing.
The vendor's own material explains blocking as a script that stays inactive on the page until triggered in the interface, when it starts excluding a domain through CSP. It is a design choice: detection first, human intervention second. Scams that appear only to one specific buyer are not observed by simulated visits.
Reflectiz is the right choice when: your internal policy forbids adding scripts to the payment page and your security team reviews alerts before acting.
SecurityMetrics Shopping Cart Monitor
SecurityMetrics is a PCI assessment company (QSA, ASV) and Shopping Cart Monitor fits into its portal: script inventory with justification, detection of content and header changes, alerts and an exportable log for the assessor, with nothing installed on the site.
The public material is candid about the limit: the tool was built to detect, the vendor says, and it works from snapshots taken at intervals. For teams that need the scam blocked while the customer is still on the page, the approach works as a complement to a real-session block.
SecurityMetrics is the right choice when: your PCI DSS assessment already goes through SecurityMetrics and you want payment page evidence integrated into the same portal.
Cloudflare Client-Side Security (antes Page Shield)
The feature, called Page Shield until March 2026 and now Client-Side Security, is available for domains proxied through Cloudflare. Documentation describes monitoring of scripts, connections and cookies, detection of malicious scripts and code changes, and content security rules that can block anything outside the allow list.
The documentation itself explains the mechanism: the report-only header goes out on a sample of responses, so a new script can take time to appear. Requirements 6.4.3 and 11.6.1 are covered in the advanced tier. Pix, boleto (Brazilian bank slip) and instant payment rails do not appear in the material.
Cloudflare Page Shield is the right choice when: your site is already behind Cloudflare, cards are the main payment method and sampled script monitoring satisfies your assessor.
How to evaluate an alternative
- 1Which payment methods does the page display? With UPI, PromptPay, PayNow, Pix, boleto or a wallet address, the tool has to compare those values with what the merchant issued.
- 2Does the tool watch each shopper or a simulated visitor? Ask on which pages and in which sessions the block actually happens.
- 3How much configuration does deployment require? Form mapping, allow-lists and tuning meetings are part of the operating cost.
- 4Do you have your own JavaScript to protect against reverse engineering? If so, obfuscation is a separate requirement from payment page protection.
- 5When is your next PCI DSS assessment? The report has to leave the dashboard with inventory, authorizations and change history, ready for the QSA.
Frequently asked questions
What is the best alternative to Jscrambler?
It depends on what your checkout accepts and what you need to protect. For script governance with cards, Feroot, c/side and Cloudflare Client-Side Security cover similar ground. For UPI, PromptPay, PayNow, Pix, boleto and stablecoins, verification of the displayed payment appears only in Proteside's public documentation.
What does a Jscrambler alternative need to cover?
Script inventory and authorization, blocking in the shopper's browser, detection of changes to the page and its headers, and a report for the assessor. If your team uses Code Integrity, protecting your own code is a separate need that a payment page tool does not replace.
Who are Jscrambler's competitors?
In the on-page agent family, Feroot, c/side, Source Defense and HUMAN Security. In external monitoring, Reflectiz and SecurityMetrics. In CDN and WAF modules, Cloudflare, Akamai, Imperva and F5. Proteside compares with each of them on these pages.
Does Proteside replace Jscrambler?
On the web payment page, Proteside covers the script inventory, requirements 6.4.3 and 11.6.1 and verification of the payment. Code Integrity's obfuscation and Iframe Integrity for providers sit outside Proteside's scope; in those cases the two tools coexist.
All guides
- Feroot alternatives
- c/side alternatives
- Source Defense alternatives
- HUMAN Security alternatives
- Reflectiz alternatives
- SecurityMetrics alternatives
- Cloudflare Page Shield alternatives
- Akamai Client-Side Protection alternatives
- Imperva Client-Side Protection alternatives
- F5 Client-Side Defense alternatives
- All comparisons
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