DomDog Alternative: cside vs DomDog (2026)

DomDog is a tool specifically designed to solve PCI DSS 4.0.1 requirements 6.4.3 and 11.6.1. On January 30th 2025, companies needing to comply with both requirements received an update.

Mar 02, 2025 • Updated Jul 19, 2026

Simon Wijckmans Founder & CEO

DomDog Alternative: cside vs DomDog (2026)

TL;DR: cside vs DomDog

DomDog is CSP tooling for reporting and violation triage. It only sees what CSP is configured to observe, and it does not analyze payloads or archive attack code.
cside runs in 100% of real user sessions with no sampling, downloads every script to its own infrastructure for server-side analysis, and archives raw attack code. CSP allowlists a domain. cside analyzes what that domain actually serves.
Only need CSP reporting: DomDog. Need real-time payload analysis, script inventory, tamper detection, and QSA evidence: cside.

What is DomDog?

DomDog's founders have a long history and track record in client-side security. All information regarding their product, and their pricing, is fully visible and very easy to find. This is rare with products in our space. Pricing starts at $999 per year, similar to cside.

How DomDog works

DomDog is tailor made for PCI DSS requirements 6.4.3 and 11.6.1 focusing on client-side security. Their set up process requires just a single script to be added to the header tag of your website. This is similar to cside, though the functionality of both scripts very a lot.

It seems like they are collecting data, showing the scripts in a dashboard and asking the user to review it. While okay for PCI, it's not the best approach from a security standpoint.

Say a stored XSS script turns malicious, they won't be able to detect it since they don't sit in the flow of the delivery. This approach is often called a JavaScript "Agent". JavaScript Agents operate within the JavaScript layer and can not monitor code outside of it. It scans for which data various scripts are collecting and allows the user to black- or whitelist certain scripts on certain websites or pages.

They do use a secondary approach, being a Content Security Policy (CSP). A CSP acts like a firewall which only trusts pre-approved script sources, not their content. Should the source stay the same but the content changes, like in the biggest client-side attack of 2024 - Polyfill - a CSP won't catch it.

We wrote an in depth article on Why CSP Doesn't Work in regards to providing the best client-side security solution:

CSP operates on an allow-list model, which permits resources from trusted domains but cannot block individual scripts or resources from those domains.

We could not find a SOC2 or PCI DSS certification.

How cside goes further

DomDog is built to check the PCI DSS 4.0.1 compliance box. cside is built to stop client-side attacks. Compliance follows from real security.

DomDog focuses narrowly on requirements 6.4.3 and 11.6.1 with behavioral monitoring that detects changes to scripts and page elements. Detection after delivery means an attacker can exfiltrate data before any alert fires. cside blocks malicious scripts before they execute in the browser. No detection window.

Where DomDog monitors for behavioral changes, cside performs payload analysis on our own infrastructure. We download scripts server-side, run detection, and identify malicious intent at the code level. This catches threats that behavioral monitoring alone would miss, especially targeted attacks that only activate under specific conditions (certain geos, time windows, or device types).

cside also goes beyond PCI DSS. We help you meet compliance requirements across HIPAA, GDPR, and CPRA. If your compliance needs extend beyond payment card standards, DomDog doesn't cover that ground.

For forensics, cside keeps immutable archives of every script payload with full version history. When auditors ask what happened during an incident, you have the actual attack code and a complete timeline, not a behavioral change log.

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. DomDog publishes none of these.

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.

Related resources

Founder & CEO Simon Wijckmans

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.

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 provides full public documentation at docs.cside.com

DomDog 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.

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

FAQ

Frequently Asked Questions

The fundamental difference is prevention versus detection timing. Domdog uses JavaScript-based detection that runs after scripts have already loaded in browsers, relying on behavioral analysis to catch threats post-execution. cside's hybrid approach analyzes scripts on our own infrastructure before they execute, blocking malicious payloads proactively. We prevent attacks from happening, while Domdog detects them after they've already been delivered.

No, because cside's core analysis happens on our platform, completely invisible to attackers. Domdog's JavaScript monitoring runs in browsers, where sophisticated attackers can detect, analyze, and potentially circumvent the detection mechanisms. cside's analysis happens server-side before content reaches browsers, so attackers can't study or bypass it.

Domdog provides behavioral 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. Incident response teams get the actual attack code for analysis rather than just behavioral observations that may not capture the full threat.

cside provides full PCI DSS compliance with immutable payload archives and detailed audit trails covering both requirements 6.4.3 and 11.6.1. Domdog's behavioral monitoring 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.

Proactive blocking prevents attacks before any user data can be compromised, while reactive detection only alerts you after malicious scripts have already executed and potentially stolen information. Domdog's behavioral analysis means sensitive data can be exfiltrated before their monitoring system triggers an alert. cside ensures malicious scripts never reach browsers, providing guaranteed protection rather than post-execution detection.

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