Cisco OpenDNS Home vs Zscaler Cloud Access Security Broker (CASB): Side-by-Side Comparison (2026)

Cisco OpenDNS Home: Free DNS service providing content filtering and phishing protection. built by OpenDNS. Core capabilities include DNS resolution service, Phishing protection, Customizable content filtering..

Zscaler Cloud Access Security Broker (CASB): CASB for securing SaaS and IaaS with inline and out-of-band protection. built by Zscaler. Core capabilities include Inline real-time security with proxy architecture and TLS/SSL inspection, Out-of-band API-based scanning for data at rest, Shadow IT discovery across cloud applications..

Both serve the Cloud Access Security Broker market but differ in approach, feature depth, and target audience.

Cisco OpenDNS Home differentiates with DNS resolution service, Phishing protection, Customizable content filtering. Zscaler Cloud Access Security Broker (CASB) differentiates with Inline real-time security with proxy architecture and TLS/SSL inspection, Out-of-band API-based scanning for data at rest, Shadow IT discovery across cloud applications.

Cisco OpenDNS Home is developed by OpenDNS. Zscaler Cloud Access Security Broker (CASB) is developed by Zscaler. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Cisco OpenDNS Home and Zscaler Cloud Access Security Broker (CASB) serve similar Cloud Access Security Broker use cases: both are Cloud Access Security Broker tools. Review the feature comparison above to determine which fits your requirements.