Comparing Browser Security vs CASB

Seraphic is an innovative browser agent that seamlessly deploys into any traditional or AI browser, instantly turning it into a Secure Enterprise Browser (SEB).

What is Seraphic Secure Enterprise Browser

Seraphic’s Secure Enterprise Browser is powered by native JavaScript Agent (JSA) enforcement, giving precision, pre-execution, and runtime control inside the browser. Seraphic stops zero and n-day exploits, advanced phishing, token/session theft, in-session exfiltration, and data loss before it happens – with no workflow change. Seraphic is injected into existing browsers or offered as a hardened browser for BYOD/contractors. The lightweight, policy-driven JavaScript component operates in the page context to govern web APIs and data paths in real-time, enabling prevention, not just detection. It augments the existing browser with an injected, standards-compliant JSA, preserving native behavior and UX, with near-zero latency.

What is a CASB

A CASB is a security solution that sits between users and cloud service providers to enforce enterprise security, governance, and compliance policies. CASBs provide visibility into cloud application usage, enabling organizations to detect risky behaviors, shadow IT, and unauthorized data sharing. They deliver powerful controls such as DLP, threat protection, and encryption for data accessed or stored in the cloud. A CASB integrates with both sanctioned and unsanctioned cloud services, offering granular policy enforcement based on user, device, and application context.

Why a CASB Falls Short

A CASB acts as a security policy enforcement point between users and cloud service providers. CASBs typically operate as forward or reverse proxies, with limited API integrations (mostly to SaaS apps), to provide visibility, compliance, data security, and threat protection for sanctioned SaaS applications. CASBs are highly effective at monitoring application usage, enforcing access policies, and integrating with other network security tools.

CASB causes shortfalls in:

Limited Control Inside the Browser

CASBs can only enforce policies at the network or application layer, lacking the ability to control granular user actions within the browser, such as copy/paste, printing, screen capture, or interaction with unsanctioned apps and browser extensions.

Traffic Steering and Visibility Gaps

For effective operation, CASBs require traffic to be routed through their proxies. This is possible in managed, on-premises environments but becomes complex or impossible for unmanaged/BYO devices and remote users. As a result, CASBs often lack visibility and control overshadow IT or unsanctioned SaaS applications.

Performance and User Experience

Inline inspection and enforcement can introduce latency, degrade user experience, and create additional points of failure.

Limited Protection Against Modern Threats

CASBs were designed for network and SaaS governance – not for detecting modern, in-browser threats such as phishing on legitimate domains, malicious extensions, or session hijacking within active browser sessions.

How Seraphic Secures the Browser

Seraphic delivers native, patented JavaScript Security Agent (JSA) enforcement that adds precise pre‑execution and runtime control inside any browser. It prevents zero‑ and n‑day exploits, advanced phishing, token and session theft, and in‑session data exfiltration before it happens, with inline DLP and governance and no workflow changes. It also adds AI‑aware protections to govern prompts, responses, and model connections in web and SaaS workflows.

At its core is a small, lightweight, policy‑driven JavaScript component that runs in the page context to instrument and govern web APIs and data paths in real time. Rather than replacing the browser, it augments it with a standards‑compliant JSA, preserving native behavior and user experience with near‑zero latency.

Seraphic places a JavaScript‑based abstraction layer above the browser’s JavaScript engine, effectively its kernel. From this vantage point, it exposes execution and memory planes to enable pre‑execution control, exploit prevention, and fine‑grained data governance across any browser and Electron app—without requiring users to switch browsers.

Identity‑ and app‑aware policies follow users across SaaS and web apps, including unmanaged devices and multiple browsers. DLP is enforced inline with granular controls for fields, forms, clipboard, downloads, uploads, and screenshots, with smart redaction and masking. AI security extends this with guardrails for AI usage, prevention of sensitive‑data exposure to AI platforms, and allow‑/deny‑listing of AI tools.

Because enforcement happens in the page context, controls remain consistent across versions, and browsers (traditional and Agentic), and are resilient to upstream browser changes. The experience is user‑friendly, with inline guidance and just‑in‑time prompts that remediate issues without breaking workflows. Deployment is frictionless and lightweight, requiring no heavy endpoint agents and with no impact on user browsing experience.

Seraphic is available in flexible delivery models: inject into existing browsers via extension, embed within an existing browser build, use agentless or workspace‑level paths, or deploy a hardened Seraphic browser for BYOD and contractor use.

Area of Focus	CASB	Seraphic Enterprise Browser Security (SEB)
Policy Enforcement Point	Network/Cloud Proxy/limited API	Extension and agent controlling all browser interactions
Visibility	Network level – external only	Browser level – including internal apps
Visibility into modern protocols (QUIC, HTTP/3, WebSockets)	Limited - encryption and multiplexing prevent inspection; often requires blocking or downgrade	Protocol-agnostic; inspects and enforces policies at browser layer before encryption
DLP Controls	Limited – file uploads/downloads	Full user action control (copy, paste, print, screen, clipboard, etc.)
Dynamic Data Masking	Not supported or depends on SaaS APIs	Real-time, policy-based masking of sensitive fields inside the browser without disrupting workflows
Session Storage and Cookie Protection	Not supported – relies on SaaS controls or IdP sessions	Encrypts browser session storage and cookies, preventing token theft, replay attacks, and session hijacking
Shadow IT Discovery	Partial, via proxy, requires traffic steering	Full, via browser-level discovery and control
Extension Governance	Minimal; may detect known risky extensions	Monitors, classifies, and blocks malicious or sideloaded extensions at runtime
Endpoint Coverage	Managed devices, on-premises, limited support for Unmanaged devices	Managed, unmanaged, BYOD, and contractor devices
Threat Protection	Network-based threats	Browser-based threats (such as phishing, exploits, extensions)
User Experience	May degrade due to proxying	Native, seamless, no browser migration
Deployment Complexity	High - traffic steering, proxy config	Low - agent/extension, supports all browsers
GenAI and SaaS Control	Limited	Full – with browser-level governance and DLP