Cisco WSA vs Zscaler: What are the differences?

Introduction

In this article, we will discuss the key differences between Cisco WSA (Web Security Appliance) and Zscaler, two popular web security solutions. Below are the six key differences between these two:

1. Deployment Model: Cisco WSA is an on-premise web security solution that requires dedicated hardware and software installation within the organization's network infrastructure. On the other hand, Zscaler is a cloud-based web security platform that offers security services without the need for on-premise hardware or software.

2. Scalability and Performance: Cisco WSA provides scalability and performance limitations based on the capacity of the installed hardware. Adding additional capacity may require hardware upgrades or replacement. In contrast, Zscaler leverages a globally distributed cloud infrastructure, providing unlimited scalability and performance that can easily handle increased traffic volumes.

3. Security Coverage: Cisco WSA primarily focuses on web filtering, application control, and visibility, providing protection against web-based threats like malicious websites, botnets, and phishing attacks. Zscaler, besides offering similar web security features, also includes advanced threat protection, cloud sandboxing, and data loss prevention capabilities, providing comprehensive security coverage.

4. Global Presence: Cisco WSA is deployed within the organization's network, which limits its availability to specific locations where the organization has operations. Zscaler, being a cloud-based solution, has a global presence with its distributed cloud infrastructure, enabling users to access web security services regardless of their geographical location.

5. Integration and Compatibility: Cisco WSA integrates well with other Cisco security products and networking solutions, providing a unified security ecosystem. Zscaler, on the other hand, can seamlessly integrate with a wide range of security solutions, including firewalls, proxies, and secure web gateways, ensuring compatibility with diverse IT infrastructures.

6. Management and Control: Cisco WSA offers centralized management and control through Cisco Security Management Appliance (SMA) or Cisco Defense Orchestrator (CDO). These platforms allow administrators to configure policies and monitor web traffic. In the case of Zscaler, its cloud-native architecture enables centralized management and control via a user-friendly web-based console, providing real-time visibility and control over web security policies.

In summary, Cisco WSA is an on-premise web security solution with limitations in scalability and security coverage, while Zscaler is a cloud-based platform that offers unlimited scalability, comprehensive security coverage, and global availability.