SASE (Secure Access Service Edge) integrates network functions and security functions into the cloud. It is the mainstream direction for enterprise network and security architecture transformation in 2026.

Core SASE Components

SD-WAN: Flexible wide-area network connection. SWG (Secure Web Gateway): Filter malicious web traffic. CASB: Protect SaaS application data. ZTNA: Replace VPN for secure remote access. FWaaS: Cloud-delivered next-generation firewall capability.

Major Vendors

Cisco Viptela+Umbrella is the top choice for large enterprises. Netskope leads in CASB and SWG. Cloudflare One excels in performance and edge security. Zscaler leads the SASE market.

Conclusion

SASE implementation should follow an incremental approach. Prioritize replacing VPN with ZTNA, then gradually integrate other components to reduce migration risk.