TL;DR: cside vs Reflectiz
- Reflectiz is a periodic remote scanner. A cloud crawler visits your pages on a schedule, so coverage is limited to what it happens to see at scan time. If an attacker fingerprints the scanner, they serve it a clean page.
- cside runs in 100% of real user sessions with no sampling, downloading every script to its own infrastructure for server-side analysis. A bad actor cannot serve cside a clean script the way they can a scheduled crawler, because cside is inside actual user traffic. Every payload archived.
- Site serves static, unconditional content to everyone: a scanner might do, and it will be cheaper. Facing geo-, device-, or account-conditional attacks: cside.
Quick answer
Reflectiz sees what its crawler receives. cside sees script behavior in real user browsers through Script Method and also offers Scan Method as scanner-based fallback coverage.
That difference matters because client-side attacks often adapt to the visitor. A crawler from a cloud IP can receive clean JavaScript while a real shopper receives malicious code inside the actual DOM. cside's approach creates optionality: use real-user browser visibility where possible, and use scanning where a script deployment is not possible yet.
Comparison table
| Criteria | cside | Reflectiz | Why it matters | What the consequence is |
|---|---|---|---|---|
| Approach | Script Method + Scan Method | Remote scanner | cside includes scanner-based coverage, but does not depend on scanning alone. | Teams get optionality instead of being locked into scanner-only blind spots. |
| Real-user browser visibility | Full support |
No support |
cside runs in the actual DOM of real sessions. A cloud scanner sees only what the page serves to that scanner. | A crawler can receive clean code while users receive malicious code. |
| Scanner evasion resistance | Full support |
No support |
Attackers can vary scripts by IP, device, country, user agent, login state, or time. | Remote scans can create a false sense of coverage. |
| [PCI DSS 4.0.1](https://www.pcisecuritystandards.org/document_library/) evidence + SAQ D | Full support |
Partial support |
PCI evidence needs to satisfy assessors and remediation reviews. | Self-described reporting may still need independent validation. |
| SOC 2 Type II | Full support |
No support |
Enterprise buyers often require independent operational assurance. | Missing SOC 2 Type II can become a procurement blocker. |
| Public status page & uptime transparency | Full support |
No support |
You can independently check live uptime and incident history before and after you buy, instead of first hearing about outages from your own users. | Reflectiz publishes no public status page or uptime SLA, so buyers can't independently verify availability. |
| Browser-side blocking | Full support |
Partial support |
Any browser-side blocking control must run inside the application. | Reflectiz accepts the same application-interaction class of risk it criticizes. |
| Public pricing | Full support |
No support |
Public pricing makes budget planning easier. | Hidden pricing adds buying uncertainty. |
Why cloud-browser scanning is not the same as DOM visibility
A scanner is a browser running somewhere else. In practice, that usually means a headless or automated browser from cloud infrastructure, a known IP range, a predictable user agent, and a session that does not behave like a real shopper.
cside's Script Method runs inside the actual page DOM in real user sessions. That is the meaningful difference. It lets cside observe what scripts do when they execute for the user, not only what a crawler was allowed to see during a scheduled scan.
This is also why scanner-only claims become weak against modern client-side attacks. Attackers can serve clean scripts to scanner infrastructure and malicious scripts to real users based on IP, geography, device, login state, checkout state, or time window.
User reviews
| Platform | cside | Reflectiz |
|---|---|---|
| G2 | 4.8/5, 11 reviews | 4.7/5, 31 reviews |
| SourceForge | 4.9/5, 25 native SourceForge reviews plus 12 additional verified third-party ratings surfaced on SourceForge (37 total reviews and ratings) | 0 native SourceForge reviews. Tooltip aggregates 33 third-party ratings (4.7/5) rather than native SourceForge reviews. |
| Gartner Peer Insights | Vendor page with 1 review | 0 reviews and 0 products listed |
Checked July 2, 2026. SourceForge's Reflectiz tooltip says 0 native SourceForge reviews and aggregates 33 third-party ratings, which suggests SourceForge is surfacing ratings from other review sites rather than native SourceForge reviews for Reflectiz.
What Reflectiz users say they dislike
Reflectiz scores well overall (4.7/5 on G2), but recurring themes in its own G2 reviews include rudimentary reporting, a cluttered interface, false positives on common payment and tracking providers, and the cost of required training. Verbatim, from "What do you dislike about Reflectiz?" responses on G2:
"I am not convinced that Reflectiz is a game changer. Additionally, I find the reporting to be rather rudimentary."
"Interface is a bit clustered makes it a bit hard to find the key point, also the false positives over popular payment providers / tracking software."
"Product complexity. The software requires training which is an added cost making its affordability limited to established companies and organisations."
Sources: cside on SourceForge, Reflectiz on SourceForge, cside on G2, Reflectiz on G2, and public Gartner Peer Insights vendor pages.
Why we are responding
Reflectiz has published unusually aggressive claims about cside. We do not know why they started doing that, but the tone is clearly hostile toward a competitor.
Security buyers should separate tone from evidence. A vendor that publishes aggressive competitor claims while not publishing SOC 2 Type II, PCI DSS SAQ D, or equivalent independent assurance gives buyers a fair reason to ask harder trust questions.
Corrections to Reflectiz claims
| Reflectiz claim | Correction |
|---|---|
| cside accesses passwords, card numbers, or PII | cside analyzes public script contents and script actions. It does not store user-entered values. |
| cside is proxy-only | cside uses Script Method and Scan Method. Script Method does not require DNS or SSL changes. |
| cside does not offer scanning | cside offers Scan Method. The difference is that cside treats scanning as one option, not the entire detection model. |
| cside takes weeks to deploy | Script Method requires one script tag. Scan Method is available when code changes are not possible. |
| cside uses hidden AI prompt injections | cside's Ask AI links are visible, user-initiated URLs with readable prompt text. You can go check this out yourself on the blog. |
| cside's blocking breaks applications | Any in-browser control can affect an application, including Reflectiz's own blocking script. |
| Cross-origin iframes are a cside blind spot | Same-origin policy applies to every vendor. Third-party payment iframes are outside the merchant's PCI DSS script-management scope, and injected iframe attacks should be handled by detecting the parent script that injected them. |
| cside detects fewer scripts | Reflectiz has not published evidence for its 20-50% claim. Scanner visibility and real-user browser visibility are not equivalent. |
The dedicated rebuttal is here: Incorrect claims made by Reflectiz about cside.
Cross-origin iframes
No vendor script on a merchant page can inspect inside a third-party cross-origin iframe such as Stripe Elements, PayPal, or Adyen during a real user session. The browser's same-origin policy prevents it. Reflectiz does not get a special exemption from that browser rule.
For PCI DSS, that point is also mostly irrelevant. A third-party payment provider's iframe is the payment provider's scope, not the merchant's script-management scope. PCI DSS 6.4.3 and 11.6.1 focus on scripts on the merchant page, the parent context around the checkout experience.
If a malicious iframe appears because another script injected it, the security control belongs one level higher: detect the script that created or controlled the injection. cside monitors parent script behavior and also runs periodic scans. For customer-owned cross-origin iframes, cside can add coverage with an additional script tag.
Independent assurance
cside has been reviewed and approved by VikingCloud for PCI DSS 4.0.1 requirements 6.4.3 and 11.6.1. cside also publishes SOC 2 Type II certification and PCI DSS SAQ D through its Trust Center.
Reflectiz did not publish equivalent QSA approval, PCI DSS SAQ D, or SOC 2 Type II certification in the public materials reviewed on May 20, 2026.
cside also publishes a public status page at status.cside.com, a public trust portal at trust.cside.com, and a 99.9% uptime SLA, so you can verify our reliability and incident history for yourself. Reflectiz publishes no public status page or uptime SLA.
Conclusion
Reflectiz can help with inventory and periodic review. cside also offers scanning, but combines it with runtime browser-layer detection, payload forensics, PCI evidence, and enterprise assurance. That gives buyers more deployment optionality and stronger real-world coverage.
Try cside before you buy. cside has a free plan, so you can sign up, deploy, and explore the platform yourself, with no sales calls or procurement process. And our support team is one message away whenever you need a hand.
Sign up or book a demo to get started.
Reflectiz alternatives: how cside compares
If you are evaluating Reflectiz alternatives for client-side security and PCI DSS 4.0.1 requirements 6.4.3 and 11.6.1, cside is the runtime option that does not depend on a scheduled scanner. Reflectiz runs periodic remote scans from cloud infrastructure, so coverage is limited to what its crawler sees at scan time, and an attacker who fingerprints the scanner can serve it a clean page. cside runs in 100% of real user sessions with no sampling, downloads every script to its own infrastructure for server-side analysis, and archives the raw payload as QSA-grade evidence. And if you want scanner-style coverage too, cside offers a like-for-like agentic crawler that is more intelligent and easier to set up than Reflectiz: it captures script behavior at runtime and maps the entire vendor load chain, including the fourth-party scripts your vendors pull in, powered by threat intelligence gathered across thousands of sites. cside also publishes SOC 2 Type II, PCI DSS SAQ D, VikingCloud QSA validation, public pricing, and a public status page, none of which Reflectiz publishes as of this comparison. cside gives you both real-user browser visibility and a smarter crawler, with payload forensics and independent assurance.
Reflectiz competitors
Reflectiz competes with client-side security and PCI DSS script-monitoring tools including cside, Jscrambler, Akamai Page Integrity Manager, Imperva, Source Defense, and Cloudflare Client-Side Security. Teams most often shortlist cside when they want real-user session coverage instead of scheduled scanning, and archived payloads for QSA review rather than scanner reports alone. The comparison table and reviews above put the two side by side.
Related resources
Founder and CEO of cside. Previously a product manager on Cloudflare Page Shield (now Cloudflare Client-Side Security). Co-chair of the W3C Anti-Fraud Community Group and a Forbes 30 Under 30 honoree. Building accessible security against client-side attacks, web security is not an enterprise-only problem.
