What is SASE? Secure Access Service Edge, or SASE, is an enterprise networking and security category introduced by Gartner. SASE converges SD-WAN and Security Service Edge (SSE) functions, including FWaaS, CASB, DLP, SWG, and ZTNA, into a unified, cloud-native service. With SASE, enterprises can eliminate the effort and costs required to maintain complex and fragmented infrastructure made of point solutions, reduce the risk for breach and data loss with optimal security posture, enable secure work from anywhere, and improve access to global applications on premises and in the cloud.