Free tools Windows power users keep installed
One-click scans. No signup required.
For enterprise remote access, the main alternatives to a conventional VPN are zero-trust network access (ZTNA) and, for broader security programs, Secure Service Edge (SSE) or Secure Access Service Edge (SASE). ZTNA is a natural candidate when people need access to specific private applications; SSE/SASE is worth evaluating when private access is one part of a wider cloud-delivered security program. A VPN can still fit network-level or legacy requirements. The right choice depends on the resources, users, controls, and operational responsibilities your organization actually has—not on the architecture label alone.
What should you compare?
Enterprise access has to serve distributed employees, contractors, partners, and devices reaching resources across on-premises systems and multiple clouds. A single perimeter-centered design may not match that mix. NIST’s guidance addresses zero-trust access to resources in those environments, while its enterprise-network publication discusses VPN, ZTNA, and SASE as part of an evolving network landscape: NIST SP 1800-35 and NIST SP 800-215.
Compare architectures against the same requirements rather than treating them as interchangeable products. In particular, evaluate:
- Access scope: Do users need network-level reachability, or access to named applications?
- Identity and devices: How should identity, authentication, and device signals affect access decisions?
- Resource coverage: Can the approach serve legacy, on-premises, and cloud-hosted systems, plus partners and contractors?
- Policy and visibility: Can administrators express the required access rules and see enough to monitor and investigate activity?
- User and administrator workflow: What changes for users, help desks, application teams, and security administrators?
- Architecture and operations: Which components and services does the design depend on, and who owns policy, maintenance, monitoring, and exceptions?
- Migration and cost: What must coexist during rollout, and what do the organization’s own deployment estimates and vendor proposals show?
These are decision criteria, not a published head-to-head product score. The cited government guidance does not establish comparative vendor pricing or an independent VPN-versus-ZTNA performance winner.
#1 Best Overall
How do the main options differ?
| Approach | Access model and when to consider it | What to examine |
|---|---|---|
| Traditional remote-access VPN | Network-level access; consider it where users need that reachability or legacy systems depend on it. | Concentrator exposure, configuration, patching, traffic routing, and operational workload. CISA and partner agencies discuss vulnerabilities and deployment risks; that is not a claim that every VPN deployment is insecure. See their June 18, 2024 guidance. |
| Zero-trust network access (ZTNA) | User- and device-to-application access; consider it when the intended policy is access to particular private applications, whether on-premises or in the cloud. | Identity and device-policy integration, application coverage, exceptions, monitoring, and dependencies. NIST documents varied implementation approaches in SP 1800-35; product architecture differs by vendor. For example, Zscaler’s Private Access architecture documentation describes that vendor’s approach, not an independent comparison. |
| SSE or SASE | Consider these broader approaches when private application access is part of a wider cloud-delivered security program. NIST describes SASE within a framework for integrating security services for modern enterprise networks. | Whether the broader scope matches actual requirements, which services and dependencies are included, and who operates them. A broad platform is not automatically necessary for every VPN replacement. See NIST SP 800-215 and CISA’s joint guidance. |
ZTNA, SSE, and SASE are not security guarantees by themselves. Assess the implementation, its policies and dependencies, and how it will be operated. CISA encourages organizations to consider modern approaches including Zero Trust, SSE, and SASE, while also highlighting risks associated with remote-access and VPN deployments in its network access security guidance.
When is each approach a fit?
Keep or use a VPN for network-level needs
A VPN remains a candidate when an application or workflow requires network-level access, or a legacy dependency cannot yet be served another way. Map the reach users receive and the traffic path, then include concentrator configuration, patching, exposure, and operating workload in the security review. CISA’s guidance identifies vulnerabilities and misconfiguration-related business risks to account for; it does not say that every VPN is unsafe.
Rank #2
Evaluate ZTNA for access to private applications
ZTNA is most relevant when the policy goal is to connect an authorized user and device to a particular private application rather than grant broader network reachability. Check that the design covers the actual locations and types of applications, the identity and device signals you intend to use, and the exceptions required by real workflows. NIST SP 1800-35 provides examples rather than a single prescribed implementation: its 2025 guide documents 19 example implementations, developed with 24 collaborators through Cooperative Research and Development Agreements. The examples can inform design choices, but do not promise a particular deployment result.
Consider SSE/SASE for a broader security program
Bring SSE or SASE into scope when the organization is evaluating a wider set of cloud-delivered security services alongside private application access. NIST SP 800-215, published in November 2022, places SASE in the context of integrated security services for modern enterprise networks. Decide whether that wider scope addresses requirements you have identified; do not assume that replacing a VPN requires adopting a broad platform.
How should you plan a migration?
Treat migration as a design and operations effort, not just a change of remote-access client. Use a staged plan that makes dependencies, owners, and failure handling explicit.
- Inventory people, devices, and resources. Record employees, contractors, partners, device types, and the applications they use. Include legacy services, on-premises resources, and cloud platforms.
- Map access requirements. For each application or workflow, identify who needs access, whether network-level reachability is required, and which identity and device signals should inform the policy.
- Choose a pilot and define ownership. Select representative users and applications that can be migrated independently. Assign owners for access policy, logging, exception handling, and operational support.
- Set validation and rollback criteria. Define what successful access looks like for each representative user journey, what logs administrators need, how exceptions will be approved, and when a change should be reversed.
- Test before expanding. Exercise representative application and user journeys, including relevant legacy dependencies and partner access. Resolve policy and workflow problems before broad rollout.
- Coexist where necessary, then reassess. Keep existing access paths available during a staged transition when dependencies require it. Remove or reduce them only after the replacement path and operational procedures have been validated.
NIST’s SP 1800-35 examples and supplemental introduction can help teams consider implementation approaches and resource types. Cloudflare also publishes a vendor reference architecture for moving from VPN concentrators to ZTNA; it is a vendor-specific planning example, not evidence of a universal schedule or outcome.
Rank #4
How can you make the decision for your organization?
Write down the required access model first, then evaluate candidate architectures against the same application inventory, policy needs, user journeys, and operational responsibilities. Ask each vendor to show how its proposal handles your representative cases, what components and service dependencies it introduces, and what your team must operate. Compare total cost using your own deployment assumptions and vendor proposals; the cited sources do not establish current comparative product prices or a universal cost advantage.
The available guidance supports a choice based on requirements, not a single best architecture for every enterprise. NIST’s enterprise network guidance discusses these approaches in a changing landscape, and CISA’s 2024 guidance encourages considering modern alternatives while attending to remote-access risks.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
