cside.com

What It Is

cside is a Browser Security & Fraud Prevention Platform focused on browser-side security. Its core use case is monitoring third-party scripts on payment and checkout pages to detect Magecart, web skimming, e-skimming, malicious script changes, while also providing device fingerprinting, AI agent/headless browser detection, account takeover and credential-stuffing detection, and chargeback evidence collection. It emphasizes 100% visitor-session coverage with no sampling, making it suitable for payment-flow security and client-side supply chain risk management.

Core Capabilities and Compliance

In terms of protection, cside covers client-side script security, CSP reporting, script blocking, clickjacking and cryptojacking defense, and can provide automated dashboards and AI-generated script compliance explanations for PCI DSS 4.0.1 requirements 6.4.3 and 11.6.1. Its Fingerprint product supports cross-session device identification, VPN/proxy detection, AI agent detection, and recognition of automation frameworks such as Puppeteer, Playwright, and Selenium. Compliance-related information includes PCI DSS Validated, AoC, SOC 2 Type II, as well as capabilities for preventing GDPR/CCPA/HIPAA violations.

Deployment, Management, and Integrations

Deployment is lightweight: add a script tag, and cside says monitoring can begin within 5 minutes. It does not operate as a proxy or reverse proxy, nor does it sit in the critical transaction path. On the management side, it provides real-time malicious-domain alerts, script payload alerts, script history retention, per-vendor permission controls, and audit logs. Integrations include Webhook, email, SSO, S3 log push, SIEM, Jira/Linear, Vanta/Drata, Chargebacks911, and AWS Marketplace. Support is a notable highlight: according to the text, all plans from Free to Enterprise can receive a shared Slack or Teams channel, with a 15-minute response SLA during business hours.

Pricing, Pros, and Cons

Pricing is split into Script Security and Fingerprint. The free tiers provide 2,500 payment-page views and 1,000 API calls respectively. Business plans for both start at $99/month. Script Security is billed based on payment/checkout page views, with 500,000 views priced at $399/month. Enterprise pricing is custom and also supports MTU-based pricing. The advantages are that, for PCI scenarios, billing is based only on payment pages rather than total site traffic; deployment is simple; and the feature set spans compliance through fraud prevention. The downsides are that enterprise pricing is not transparent, and SSO, SLAs, long-term retention, dedicated support, and advanced integrations are mostly limited to Enterprise. It also does not disclose information about China accessibility, data residency, or Chinese-language support.

Best Fit and China Access

cside is suitable for e-commerce, payments, SaaS, subscription businesses, and any team that needs to protect checkout/payment pages and meet PCI DSS 4.0.1 requirements. It is also relevant for organizations dealing with AI agents, credential stuffing, ATO, or chargeback dispute evidence needs. The source text does not specify China accessibility, so it should be considered unknown. Network connectivity, cross-border payment support, and compliance implementation should be verified before trial or purchase. If deploying in mainland China, teams should also assess script-loading stability, outbound log transfer, payment methods, and local alternatives.