Top 10 Best Software-Defined Perimeter (SDP) Solutions in 2026
Brief
A software-defined perimeter makes your infrastructure invisible: resources accept no unauthenticated connections, so attackers cannot scan, probe, or exploit what they cannot see.
Zscaler leads at enterprise scale, Appgate remains the purest SDP implementation of the original architecture, and Twingate is the fastest path for teams replacing a VPN this quarter. Here are the ten best SDP solutions, what separates them, and how to choose.