Our firm is expanding its remote workforce, and our current hardware-based VPN is struggling with latency. I’m hearing a lot about Secure Access Service Edge (SASE) as a replacement for SD-WAN. For a mid-sized company, is the cost of migrating to SASE worth the performance gains, or should we just upgrade our existing SD-WAN infrastructure?
3 answers
The shift to SASE is less about "ditching" SD-WAN and more about integrating it with a security stack. In 2026, the "perimeter" has essentially vanished. SASE combines SD-WAN’s routing capabilities with cloud-native security like ZTNA (Zero Trust Network Access) and CASB. If your users are accessing SaaS apps like Salesforce or O365, SASE is far superior because it inspects traffic at a nearby Point of Presence (PoP) rather than backhauling it to your data center. This drastically reduces latency compared to a traditional VPN.
With SASE being cloud-delivered, do we lose the granular control we used to have with on-premise firewall appliances?
Go with SASE if you have a "Cloud-First" strategy. If most of your workloads are still on-prem, stick with SD-WAN for now.
Agreed, Jennifer. The ROI on SASE really shines when your data is distributed. For centralized data, the migration complexity might outweigh the immediate benefits.
David, to answer your concern, you actually gain unified control. Instead of managing 50 different firewall rules across various branches, you manage one global policy in the cloud. Most SASE providers now offer "Digital Experience Monitoring," which gives you more visibility into the end-user's actual connection quality than any local appliance ever could. You aren't losing control; you're just moving the dashboard from a local rack to a global console.