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Remote access is no longer limited to users connecting to a corporate network from a single location. Teams now work across cloud apps, SaaS platforms, and distributed environments, which has pushed organizations to rethink how they secure access.
Traditionally, VPNs handled remote connectivity by creating encrypted tunnels into internal networks. As infrastructure moved to the cloud and users began accessing applications directly, newer approaches like Secure Access Service Edge (SASE) emerged.
Both SASE and VPN are designed to provide secure remote access, but they work in different ways. In our SASE vs VPN guide, we’ll break down how each works and highlight their differences to help you understand when one may be more suitable than the other.
What Is SASE?
Secure Access Service Edge (SASE) uses a cloud-delivered architecture to provide secure access to applications and resources. Instead of backhauling traffic to a corporate data center, SASE delivers access through distributed cloud points of presence closer to users and resources. SASE combines networking and security capabilities into a single service.
These may include:
- Secure web gateways (SWG)
- Cloud access security brokers (CASB)
- Firewall-as-a-service (FWaaS)
- Zero trust network access (ZTNA)
- Software-defined WAN (SD-WAN)
Together, these components help enforce access policies, inspect traffic, and route connections securely. Organizations often consider SASE when supporting distributed teams, cloud applications, and remote users.
What Is VPN?
A virtual private network (VPN) creates an encrypted tunnel between a user’s device and a private network or gateway. Users can securely access internal systems, applications, or resources over the internet as if they were connected directly to the organization’s network.
When connected to a VPN, traffic is routed through a VPN server before reaching its destination. Encryption is used to protect sensitive data in transit, while the VPN gateway controls access to internal services.
Organizations commonly use VPNs to enable remote access for employees, connect branch offices, and secure connections to private infrastructure. VPNs provide network-level access, meaning users connect to the broader network before reaching individual applications.
SASE vs VPN: Key Differences
While both aim to secure remote access, SASE and VPN are built differently. Here’s how they compare:
Architecture
SASE uses a cloud-delivered architecture where networking and security services are provided through distributed points of presence. Users connect to the nearest SASE edge, where security policies are applied before traffic is routed to applications. The model avoids sending traffic back to a centralized corporate network before reaching cloud or internet-based resources.
VPNs rely on a gateway-based architecture. They establish an encrypted tunnel to a VPN server, which may be located in a data center, corporate network, or cloud environment. Traffic flows through that gateway before accessing internal systems or other resources, keeping access centered around the network rather than distributed cloud edges.
Access Model
SASE follows an application-centric access model. Users are granted access to specific applications or services based on defined policies, rather than connecting to an entire network. Access decisions are typically enforced at the cloud edge before traffic reaches the requested resource.
VPNs take a network-centric approach to access. After establishing a connection to the VPN gateway, users are placed on the internal network and then access applications from there. Access permissions are enforced through configured policies, either at the VPN gateway or within the internal network.
Security
SASE integrates security controls into the access layer, allowing traffic to be inspected and policies enforced before users connect to applications. Security functions like SWG, FWaaS, and ZTNA are delivered through the same cloud architecture. Consistent policies can be applied regardless of user location or the application being accessed.
VPNs focus on securing the connection between the user and the network via encryption. Once the tunnel is established, access is granted to the internal network based on configured policies. Additional security controls may be applied at the VPN gateway or within the internal network, depending on how the deployment is configured.
Performance
SASE can route traffic directly to applications through nearby cloud points of presence, thereby reducing the distance data needs to travel. Direct-to-application access can help avoid unnecessary routing through a centralized network, particularly when users access cloud or SaaS services.
VPN performance depends on the VPN gateway and the path traffic takes after connection. Traffic is first sent through the VPN server before reaching its destination, which can introduce additional latency. Performance may also be affected when multiple users connect to the same gateway and share available bandwidth.
Scalability
SASE scales through cloud-delivered infrastructure. New users and locations can be added without deploying additional on-premises gateways, as access is delivered through distributed cloud points of presence. Capacity is handled within the provider’s infrastructure, allowing organizations to extend access as requirements grow.
VPN scalability comes down to how the VPN infrastructure is deployed. Expanding access may involve increasing gateway capacity, adding additional servers, or deploying multiple gateways. Scaling can require infrastructure planning to maintain performance as the number of users grows.
Deployment
SASE deployment involves configuring access policies and connecting users or locations to the cloud-delivered service. Security and networking capabilities are delivered through the same platform, with policy management handled centrally.
VPN deployment requires setting up VPN gateways, configuring authentication, and defining network access policies. Users must connect to the gateway to access internal resources, and deployment may involve integrating with existing network infrastructure.
SASE vs VPN Comparison Table
The table below summarizes the key differences between SASE and VPN:
| SASE | VPN | |
| Architecture | Cloud-delivered architecture with distributed points of presence | Gateway-based architecture with traffic routed through a VPN gateway |
| Access Model | Application-centric access to specific applications based on policies | Network-centric access to the internal network before reaching applications |
| Security | Security controls integrated into the access layer with centralized policy enforcement | Encrypted tunnel with additional controls at the gateway or within the network |
| Performance | Routing through nearby cloud points of presence can reduce traffic distance | Traffic routed through the VPN gateway can introduce additional latency |
| Scalability | Scales through cloud-delivered infrastructure as users and locations are added | Scaling depends on gateway capacity and additional VPN infrastructure |
| Deployment | Centralized policy configuration through the service | Gateway setup with authentication and network access configuration |
When to Use SASE
SASE may be a better fit in the following scenarios:
- Supporting distributed or remote workforces
- Accessing cloud and SaaS applications directly
- Applying consistent policies across users and locations
- Reducing reliance on centralized network infrastructure
- Managing networking and security through a single platform
When to Use VPN
VPNs may be more suitable in the following situations:
- Providing remote access to internal systems
- Securing access to private infrastructure
- Connecting users to a centralized corporate network
- Supporting legacy or network-dependent applications
- Extending access within existing network environments
Frequently Asked Questions
SASE is not necessarily better than VPN, but it serves a different purpose. SASE is built for application-centric access across distributed users and cloud environments, while VPNs connect users to a network. The better option depends on how users access resources and where those resources are hosted.
Yes, SD-WAN is commonly included as part of a SASE architecture. It provides the networking layer used to route traffic across locations and users. SASE also typically includes security components such as SWG, CASB, FWaaS, and ZTNA.
SASE delivers secure access through a cloud-delivered architecture with integrated networking and security controls. VPNs create encrypted tunnels that connect users to a network before accessing applications. The difference lies in how access is delivered and enforced.
Yes, VPNs are still widely used for remote access. Organizations commonly use them to connect users to internal networks, private infrastructure, and legacy applications. VPN deployment depends on how access to internal resources is structured.
Final Thoughts
Choose SASE when access is centered around cloud applications, distributed users, and centralized policy enforcement. Choose VPN when users need secure connectivity to internal networks, on-premises systems, or legacy resources. Both approaches remain valid, and the right fit depends on how your environment is structured.
