What SD-WAN Can't Do, But SASE Can
Where connectivity alone stops and converged security begins.
Why it is worth reading
SD-WAN was the logical step away from rigid, costly networks that backhauled everything to the data center: reliable local internet access at a fraction of the cost. But work now happens anytime, anyplace, anywhere - and security integrated as an afterthought will not keep remote users safe without slowing them down. That is where SD-WAN hits its limits.
This guide shows where SASE picks up: SD-WAN stays the network component, while the Security Service Edge - ZTNA, CASB, SWG, FWaaS and advanced threat protection - covers security in the cloud and at the edge, close to users and devices. It walks through six ways SASE drives business value, from cybersecurity and TCO to compliance, cloud, Zero Trust and hybrid work, and makes the case for acting now.
What is inside
- SD-WAN vs. SASE - a new eraWhy SD-WAN was the right move for the cloud decade, and why regulatory pressure and remote work now demand more.
- About SD-WANWhat the software-defined overlay does well - performance, reliability, cost - and where edge security reaches its limits.
- What SD-WAN can't do, but SASE canNetwork and security converged as a service from one cloud platform, with ZTNA, CASB, SWG and FWaaS built in natively.
- How SASE drives business valueSix angles in detail: cybersecurity, lower TCO, regulatory requirements like DORA and NIS2, cloud, Zero Trust and hybrid work.
- Why act nowSD-WAN was good for its time; SASE encompasses it and goes beyond it toward cyber resilience.
- Open Systems as a SASE partnerWhat a managed, cloud-native SASE platform with 24x7 expert support looks like in practice.
SASE can do more than SD-WAN because it encompasses SD-WAN and goes beyond it to create cyber resilience.Who it is for
- Network and infrastructure leads running an SD-WAN that has reached its security limits
- CISOs and compliance owners facing DORA, NIS2 and the Cyber Resilience Act
- IT leaders building the business case for converging network and security
Founded in Switzerland. Backed by Swiss Post.
Founded in Switzerland in 1990, Open Systems generates more than USD 100 million in annual revenue and supports global enterprise customers operating in more than 180 countries. Since 2024, the company has been part of Swiss Post, combining Swiss trust and stability with global reach. As a European alternative to US- and Israel-based cybersecurity providers, Open Systems is guided by strong principles around sovereignty requirements, regulatory alignment, transparency and shared responsibility - taking clear ownership for security, performance and operational outcomes, helping organizations maintain control in an increasingly complex digital landscape.
Autonomous SASE. AI-powered. Human-backed.
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