Where SD-WAN Started
The technology that became SD-WAN had no name in 2010. The conversation back then was about WAN optimization: squeezing more performance out of expensive MPLS circuits that were slow to provision and increasingly misaligned with the cloud. By the time SD-WAN gained market traction around 2014, the value proposition was clear: intelligent traffic routing across multiple link types, centralized management, and the ability to replace costly private circuits with commodity broadband. Early adopters gained significant bandwidth at their branches and reduced connectivity costs substantially.
The pure-play vendors that defined the category, including Viptela, VeloCloud, Silver Peak, and Versa Networks, attracted the attention of the industry's largest players. A wave of acquisitions between 2017 and 2022 brought SD-WAN into the portfolios of Cisco, VMware, HPE, and Palo Alto Networks. More recently, Arista Networks acquired VeloCloud from Broadcom in 2025, expanding into branch networking with an AI-era WAN thesis. HPE's acquisition of Juniper Networks created a combined portfolio spanning EdgeConnect, Session Smart Router, and Mist AI. Carrier managed services, now preferred by the majority of enterprises over self-managed deployments, became a primary delivery model during this same period.
Each ownership transition and platform evolution reinforced a consistent pattern: organizations that moved quickly without a clear requirements definition struggled most. The technology changed. The organizational challenge did not.
Where the Market Is Today
Single-vendor SASE is winning. The forces driving this shift, the distributed workforce, cloud-first applications, and zero trust security requirements, demand a unified answer that legacy WAN architectures cannot provide. Vendors that have genuinely integrated SD-WAN and security service edge capabilities on a shared policy engine are taking market share from those that have bolted them together through APIs and marketing language.
SASE has moved from an emerging concept to the default way enterprises think about networking and security together. What used to be two separate evaluations, one for SD-WAN and one for security service edge, is now a single platform decision for most organizations. In my conversations with enterprise customers, the shift is already well underway: when a network modernization comes up, the security conversation is no longer a separate track. It is part of the same decision from the start.
AI and agentic capabilities are reshaping the battleground further. Every major SASE vendor is racing to secure enterprise AI traffic as organizations deploy generative AI tools, copilots, and internal AI agents. This matters because agentic AI rewrites WAN traffic patterns in ways the network was not originally designed to handle. Traditional enterprise traffic flows from users to applications. Agentic AI introduces peer-to-peer communication between AI agents, traversing networks automatically and without human oversight. The SASE platform that can classify, secure, and optimize that traffic is the platform positioned to win the next buying cycle.
On the operations side, AI and AIOps are delivering measurable value in day-two network management: faster troubleshooting, predictive anomaly detection, intelligent path recommendations, and capacity planning. The honest assessment is that fully autonomous self-healing capabilities remain aspirational at scale, but AI-assisted operations are real and working in production environments today.
What This Means for Your Organization
In 2018 and 2019, many enterprises adopted SD-WAN because it was the next major technology. They moved fast, and many skipped the step that matters most: a formal requirements definition. Without clearly answering what the solution needs to accomplish, which business units are impacted, and at which layers (application, security, branch, mobile), organizations ended up with technically correct deployments that underperformed operationally. Those organizations are now the ones navigating the most complex SASE migrations.
One of the most consistent issues we encounter at ePlus is organizations that go straight from business dissatisfaction to vendor evaluation without completing that requirements work. The result is a technically sound selection that does not fit the operational model. The deployment succeeds on paper. The organization struggles in practice. Getting requirements right before the vendor conversation begins is the single most impactful thing an enterprise can do to improve its SASE outcome.
The second most common challenge is treating SD-WAN or SASE as a project rather than a managed capability. The value is not in the deployment. It is in the ongoing optimization: tuning policies as applications change, managing transport performance across link types, adapting as cloud footprints evolve. Organizations that build in managed operations from the start get dramatically more from their investment than those that treat cutover as the finish line.
At ePlus, we use READI as our architectural framework across every networking engagement: Resilient, Efficient, Agile, Defensive, Intelligent. We apply it across all layers of the enterprise and all business units, because what resilience means to a healthcare network is not what it means to a manufacturer's branch environment. Surfacing those definitions before the vendor evaluation begins is how we help organizations make better decisions and build networks that deliver on their promise.
Our managed SD-WAN and SASE services span multiple platforms, giving customers the flexibility to choose the right technology while working with a partner that understands both the technical depth and the operational reality. Whether you are beginning a WAN modernization journey, re-evaluating an existing deployment, or navigating the SASE convergence, the conversation starts with requirements.
Ready to start that conversation?
Reach out to your ePlus account team or visit eplus.com/what-we-do/enable-high-performance-and-drive-transformation to learn about our READI network assessment approach and managed networking services.