Best Client-Side Protection Solutions - Page 2

How Many Client-Side Protection Solutions Products Does G2 Track?

Total Products under this Category: 20

Category Stats (Sep 2026)

  • Average Rating: 4.44/5 The average rating of products in this category, based on all submitted ratings

Last updated: September 28, 2026

How Does G2 Rank Client-Side Protection Solutions Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 900+ Authentic Reviews
  • 20+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Client-Side Protection Solutions

G2 Grid® for Client-Side Protection Solutions plotting products by satisfaction and market presence

Highlighted products: Cloudflare Application Security and Performance, Reflectiz, Feroot Security, cside, and Jscrambler.

Underlying data: [Grid® JSON](https://www.g2.com/categories/client-side-protection/grids.json?focus%5B%5D=cloudflare-application-security-and-performance&focus%5B%5D=reflectiz&focus%5B%5D=feroot-security&focus%5B%5D=cside&focus%5B%5D=jscrambler)

otto

otto-js defends your live WebApp against attacks at runtime while continuously monitoring for new risks, vulnerabilities, and out-of-compliant scripts. otto-js is an end-to-end script security & compliance solution for your cross-function team, centralizing the security, compliance, management, reporting & alerting for all your 3rd & Nth-party script dependencies. otto-js gives RegOps, WebOps, SecOps, and DevOps teams the end-to-end unified solution they need to co-manage script security & compliance with ease and speed. 3rd-party scripts and open-source components that may have been tested in the CI/CD pipeline can change, introducing new risks to your security & compliance, leaving your site open to attacks, user data compromise, and costly fines.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind otto?

  • Seller: otto-js
  • Year Founded: 2017
  • HQ Location: Memphis, US
  • LinkedIn® Page: www.linkedin.com
    2 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of otto?

Radware Client-Side Protection

Client-Side Protection Secure end users from attacks embedded in your application supply chain.

Who Is the Company Behind Radware Client-Side Protection?

  • Seller: Radware
  • Year Founded: 1997
  • HQ Location: Tel Aviv, Tel Aviv
  • Twitter: @radware
    12,488 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    1,609 employees on LinkedIn®

ScriptPatrol

ScriptPatrol is client-side (browser-layer) security monitoring for any website that handles payments or logins — e-commerce, SaaS, banking, booking, and healthcare. Your firewall and server can't see the JavaScript that runs in your customers' browsers, and that's exactly where Magecart, formjacking, and e-skimming attacks operate. ScriptPatrol can see it. It loads your real checkout, login, and admin pages the way a visitor's browser does — with no tag to embed, no agent to install, and zero impact on site performance — fingerprints every script (external and inline) with a SHA-256 hash, and compares each scan against a verified baseline. When an unexpected or unauthorized script appears or changes, it is risk-scored and you are alerted by email and Slack with a plain-language explanation of what changed. Every monitored page gets a transparent A+ to F Security Score built from your security headers, your TLS configuration, and live script integrity. ScriptPatrol also identifies the vendor behind each third-party script, flags look-alike (impersonating) domains, maps where each page sends data, and checks scripts against known-vulnerable library versions and known-malware/phishing hosts. Routine vendor updates are recognized and filtered out, so an alert always means something worth a look. It scans reliably even on sites behind Cloudflare and bot protection, and detects challenge pages so they are never mistaken for real results. Export PDF reports with a full script inventory and change history — the same evidence PCI DSS 6.4.3 and 11.6.1 ask for, where they apply.

Who Is the Company Behind ScriptPatrol?

SiteWall

SiteWall by CellWall is a client-side security, third-party JavaScript governance platform that helps organizations discover, monitor, control, and prove what happens on their websites. Built for CISOs, CTOs, application security, engineering, privacy, and compliance teams, SiteWall provides continuous visibility into first-party and third-party scripts, providers, resources, network requests, browser APIs, storage access, and runtime behavior. SiteWall automatically discovers every observed provider and JavaScript resource running on a monitored website. It creates a live third-party script inventory with provider profiles, resource history, loading relationships, security scores, performance data, API access, network destinations, activity history and past incidents. Visual exposure maps and load-flow analysis show which third parties load additional code, what browser capabilities they use, and where data may be transmitted. Session-level evidence supports investigation and validation of the real client-side attack surface. Continuous client-side monitoring detects anomalous behavior, unauthorized changes, risky resource activity, new scripts, integrity issues, and operational problems that may affect website security, privacy, performance, or functionality. SiteWall centralizes anomalies, issues, alerts, and runtime evidence so teams can move from detection to investigation and response without relying only on periodic scans or static source-code analysis. SiteWall also provides policy enforcement and runtime protection. Teams can apply Zero Trust defaults to newly discovered resources, automatically derive permissions from observed usage, configure granular browser capability controls, restrict storage and network access, define geographic and domain-based network policies, and manage controls globally or for individual providers and resources. If a third-party provider becomes compromised or affects website reliability, teams can restrict or block it while preserving a clear policy and audit trail. For compliance and audit readiness, SiteWall maps observed client-side activity to requirements and evidence for PCI DSS, GDPR, and ISO 27001. Dedicated workflows support script inventory, change detection, authorization, business justification, integrity verification, third-party assessment, requirement-level findings, remediation actions, readiness tracking, and exportable reports. This replaces fragmented screenshots and manual evidence collection with continuous, audit-ready proof based on actual browser behavior. SiteWall integrates with existing security, monitoring, and operational workflows, including SIEM and observability tools. By combining third-party JavaScript discovery, client-side attack-surface visibility, browser runtime monitoring, anomaly detection, policy enforcement, incident investigation, compliance automation, and reporting, SiteWall helps organizations discover, control, and prove what happens in the browser.

Who Is the Company Behind SiteWall?

Source Defense Protect

Source Defense Protect is a turnkey, automated web security and data privacy compliance solution designed to protect data at the point of input. It extends web security beyond the server to the client-side (the browser) where a majority of data theft activity now occurs. It provides a simple and effective solution for data security and data privacy compliance – with options for securing your own code, as well as addressing a ubiquitous gap in the management of third-party digital supply chain risk – controlling the actions of the third-party, fourth and nth party JavaScript that powers your site experience. It acts as a sandbox for all of the JavaScript running on your websites, isolating it from the web browser in real-time and preventing any malicious code execution. Source Defense Protect provides security against all forms of client-side security incidents – keylogging, formjacking, digital skimming, Magecart, etc. Additionally, it provides compliance assurance with strict data privacy mandates such as PCI DSS, GDPR and CCPA by allowing you to enforce your policies over the dozens of third-party partners on your websites – preventing them from reading or storing data without your express authorization. The Platform requires virtually no-effort to implement, less than five hours of management per month and delivers immediate benefits to all of your stakeholders – from the Digital and eCommerce teams that need to continually enhance your web properties, to the Security teams entrusted to mitigate cyber risk, to the Compliance teams that must ensure adherence to a variety of data privacy requirements. FULL VISIBILITY - Inventory every script – the 3rd parties you work with and the partners they call on - Understand and document the behavior of every script - Know when behaviors are modified – whether by design or through malicious activity - Continually modify policies to control unwanted or malicious behavior SECURITY & COMPLIANCE ASSURANCE - Automated prevention of client-side security incidents (formjacking, clickjacking, digital skimming, credential harvesting, Magecart, etc.) - Ongoing data privacy compliance management with the ability to customize policies - Perfectly designed for PCI DSS guidance on client-side security RAPID DEPLOYMENT & EASY MANAGEMENT - Deployed as two lines of code on your websites - Out of the box security and compliance policies - Simple and powerful two-step management process – implement policies in a flash - Less than 5 hours of management per month - The Ideal Solution for Client-Side Security and Data Privacy Compliance OUR UNIQUE APPROACH - Patented technology designed with simplicity in mind – solving a complex problem without adding strain to your already strained security operation - Multiple solutions and deployment options to fit your specific needs and budget - Complete visibility into your website partner ecosystem – allowing you to know what script is running and what it is doing - Security and compliance assurance – protecting your websites from the risk of data theft and data leakage - Complete control – enabling you to apply your own security and compliance policy controls over the behavior of every script running on your site - Ability to integrate technology actions and threat intelligence to further strengthen your security posture

Who Is the Company Behind Source Defense Protect?

  • Seller: Source Defense
  • Year Founded: 2014
  • HQ Location: Rosh Ha'Ayin, IL
  • Twitter: @SourceDefense
    833 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    44 employees on LinkedIn®
Lauren Worth
LW
Researched and written by Lauren Worth
Updated October 3, 2024