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SD-WAN vs MPLS
MPLS was the enterprise WAN standard for two decades. SD-WAN is now the default choice for cloud-first, distributed businesses. Here is how they actually compare.
SD-WAN is a software-based approach that routes traffic across any transport (broadband, DIA, LTE/5G) and connects directly to cloud applications, typically cutting WAN costs 30 to 50 percent versus MPLS. MPLS is a private, carrier-managed circuit with guaranteed SLAs for latency and packet loss, better suited to legacy, latency-sensitive applications between fixed locations.
At a glance
SD-WAN
Software-defined WAN that routes traffic over any transport.
MPLS
Private, carrier-managed circuits with guaranteed SLAs.
Head-to-head comparison
| Criterion | SD-WAN | MPLS |
|---|---|---|
| Cost | Lower; uses commodity internet transport | Higher; dedicated private circuits |
| Performance | Best-effort with intelligent, application-aware routing | Guaranteed SLAs for latency, jitter, and packet loss |
| Cloud access | Connects directly to cloud applications | Traffic is backhauled through a central data center |
| Deployment speed | New sites live in days | Provisioning can take weeks to months |
| Security | Pairs with SASE for a full zero trust posture | Inherent isolation, but no encryption by default |
The verdict
Most cloud-first, multi-site businesses are better served by SD-WAN. MPLS still makes sense for legacy, latency-critical applications running strictly between fixed locations. A hybrid approach, MPLS for the most sensitive traffic and SD-WAN for everything else, is common.
Frequently Asked Questions
Questions buyers actually ask about sd-wan vs mpls, answered plainly.
Can I run SD-WAN alongside my existing MPLS circuits?
Yes. SD-WAN can overlay existing MPLS circuits, giving you centralized visibility and intelligent routing while still leveraging your MPLS investment during a phased transition.
How much can I save switching from MPLS to SD-WAN?
Businesses commonly see a 30 to 50 percent reduction in WAN costs, though exact savings depend on your current circuit count, locations, and bandwidth needs.
Is SD-WAN as secure as MPLS?
Modern SD-WAN platforms include next-generation firewall features, encryption, and segmentation, and pair with SASE for a security posture that goes beyond what a private MPLS circuit provides on its own.
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