Your team works from home on Monday, from a Portland office on Tuesday, and from a client site on Thursday. Your apps live in Google Workspace, AWS, a few SaaS tools, and maybe one server that still sits in a closet. The question is no longer whether people work remotely. It is how they reach company resources safely from anywhere.
For years, the answer was a VPN. Today, many growing companies weigh zero trust network access (ZTNA) instead. The two approaches solve the same problem in very different ways.
This guide compares ZTNA vs. VPN in plain language, explains where each one fits, and shows how hybrid teams can move toward zero trust without a risky overnight switch.
The Short Answer: The Difference Between ZTNA and VPN
A VPN creates an encrypted tunnel that places a remote device on your network. Once connected, the user can often reach far more than they need.
ZTNA connects a verified user on a verified device to specific applications. It checks identity and device health before granting access, and many tools recheck during the session. The user does not land on the broader network.
In short, a VPN trusts the connection once it is up. ZTNA trusts nothing by default and verifies access to each application.
How a Traditional VPN Works
A remote access VPN runs client software on the laptop. The user signs in, the client builds an encrypted tunnel to a VPN gateway (often on the office firewall), and the laptop receives an internal IP address.
From that point, the laptop behaves as if it sits inside the office. Firewall rules decide what it can reach, but in many small companies those rules stay broad because tight rules take time to maintain.
Where VPNs Still Work Well
Accessing legacy systems that cannot sit behind a modern access proxy.
Admin access to network equipment from a controlled device.
Small teams with few internal resources and simple needs.
Site-to-site connections between offices or between an office and a cloud network.
Where VPNs Fall Short for Hybrid Teams
Broad access. A compromised laptop on the VPN can often scan and reach many internal systems.
Exposed gateway. VPN appliances sit on the internet and draw attackers looking for unpatched flaws. In 2024, CISA issued Emergency Directive 24-01 after widespread exploitation of Ivanti's remote access gateways.
Performance. A full-tunnel VPN routes all traffic through one gateway, which can slow cloud apps and video calls.
Poor fit for SaaS. Most of your apps no longer live behind the office firewall, so a VPN protects less of your environment than it used to.
Shared credentials and weak offboarding. Without tight identity integration, access can outlive employment.
How Zero Trust Network Access Works
ZTNA applies zero trust principles to remote access. NIST SP 800-207 describes zero trust as moving defenses away from static network perimeters toward users, assets, and resources, with no implicit trust based solely on network location.
In practice, a ZTNA tool sits between users and applications:
The user signs in through your identity provider with multi-factor authentication.
The ZTNA service checks device posture, such as disk encryption, OS version, and endpoint protection.
Policy decides which specific applications that user can reach.
The service brokers a connection to that application only. The user never lands on the broader network.
In most ZTNA designs, internal apps stay hidden from the internet, and users cannot see or scan resources they have no access to.
ZTNA vs. VPN: Side-by-Side Comparison
| Factor | Traditional VPN | ZTNA |
|---|---|---|
| Access scope | Network-level, often broad | Application-level, least privilege |
| Trust model | Trust after login | Verify access to each application |
| Device checks | Often limited | Checked at sign-in, often rechecked during the session |
| Internet exposure | VPN gateway is publicly reachable | Apps usually stay hidden behind the broker |
| User experience | Connect and disconnect manually | Usually runs in the background |
| Cloud and SaaS fit | Weak when traffic is backhauled | Strong, built for distributed apps |
| Legacy app support | Strong | Varies by vendor and app type |
| Setup effort | Lower for simple cases | Higher upfront, lower ongoing friction |
Why Hybrid Teams Push Companies Toward ZTNA
Hybrid work multiplies the places people connect from. A laptop moves between home Wi-Fi, a coworking space, an airport, and the office in a single week. Network location stops meaning much.
ZTNA matches that reality. It ties access to who the user is and the state of their device, not where they sit. A Portland employee on office Wi-Fi and a remote contractor in another state go through the same checks.
This model also maps well to customer security reviews. Questionnaires often ask how you enforce least privilege, verify devices, and revoke access. ZTNA can help you give clear, documented answers.
Identity-driven access is also a top priority in Foxcove's CISO checklist, alongside least privilege and segmentation.
The CISA Zero Trust Maturity Model as a Roadmap
Zero trust is a journey, not a product. The CISA Zero Trust Maturity Model Version 2 lays out a gradual path across five pillars: identity, devices, networks, applications and workloads, and data. CISA tailored it for federal agencies, but the document says all organizations should consider its approaches.
For a growing company, the model offers a useful reminder. ZTNA covers part of the networks and applications pillars. You still need strong identity, managed devices, and data controls to get real value from it.
Should You Replace Your VPN with ZTNA?
Not always, and not all at once. The right answer depends on your apps, team size, compliance needs, and in-house skills.
ZTNA Makes Sense When
Most of your apps live in the cloud or SaaS.
Your team works across many locations.
Customers or auditors ask about least privilege and device trust.
You already use a central identity provider with MFA.
Your VPN appliance needs frequent emergency patching.
A VPN May Still Fit When
You rely on legacy apps that ZTNA tools cannot support well.
Your team is small and accesses only a few internal systems.
You need network-level admin access for specific engineers.
Many companies run both during a transition. ZTNA handles most user access, while a tightly restricted VPN remains for a few admin or legacy use cases.
How to Move from VPN to ZTNA in Phases
A phased rollout limits disruption and lets you learn as you go.
Phase 1: Get Identity and Devices Ready
Centralize sign-in through one identity provider. Enforce MFA for every user. Enroll laptops in device management so you can check encryption, patch levels, and endpoint protection.
Phase 2: Inventory Applications and Access
List every internal and cloud application. Note who uses each one, how they reach it today, and how sensitive the data is. This inventory becomes your access policy.
Phase 3: Pilot with Low-Risk Apps
Move a small set of applications and users to ZTNA first. Gather feedback on speed, sign-in friction, and support requests.
Phase 4: Expand and Tighten
Add more apps and users. Replace broad VPN access with app-specific policies. Remove VPN access for users who no longer need it.
Phase 5: Restrict or Retire the VPN
Limit the VPN to the few cases that still require it, with strict rules and logging. Retire it entirely if no use cases remain.
Throughout the process, document policies and decisions. That record supports audits and helps new admins understand the design.
What to Look for in a ZTNA Tool
ZTNA products vary widely. When you compare options, check these points:
Identity integration. The tool should work with your existing identity provider and enforce MFA.
Device posture checks. Look for checks on encryption, OS version, and endpoint protection, plus support for your device management platform.
App coverage. Confirm support for web apps, SSH, RDP, and any legacy protocols you still use.
Deployment model. Decide between agent-based access for managed devices and agentless browser access for contractors.
Logging. Make sure access logs export to your monitoring or SIEM tool for audits and investigations.
Pricing structure. Understand whether pricing scales by user, app, or bandwidth as you grow.
A short pilot answers most of these questions better than a sales demo.
Common Mistakes When Adopting ZTNA
Buying a tool before fixing identity. ZTNA depends on reliable identity and MFA. Weak identity undermines it.
Copying VPN rules into ZTNA. Broad "allow all" policies defeat the purpose.
Ignoring unmanaged devices. Decide how contractors and personal devices get access, if at all.
Skipping user communication. People need to know what's changing and why, or they'll find workarounds.
Where Foxcove Fits for Portland Hybrid Teams
Remote access design touches your network, identity, cloud, and security policies at once. Foxcove's secure network design services in Portland cover the network side of this decision, including access control between segments and connectivity between offices and cloud platforms. For teams with workloads in AWS, Azure, or Google Cloud, Foxcove's cloud and data management services in Portland cover access control and cloud visibility.
The right path depends on your headcount, app stack, compliance needs, and internal capacity. Foxcove helps you decide whether to keep, restrict, or replace your VPN.
Plan Your Move to Zero Trust Access
VPNs still solve some problems well. For hybrid teams with cloud-first apps, though, ZTNA usually provides tighter access, better device checks, and a cleaner user experience.
Start with identity and devices, move apps in phases, and keep a VPN only where it still earns its place. If your team needs help planning that path, explore Foxcove's information security services or contact Foxcove to discuss your remote access setup.
Frequently Asked Questions
1. Is ZTNA more secure than a VPN?
ZTNA generally reduces risk because it grants access to specific apps, not the whole network, and checks identity and device health before granting access. Its security still depends on strong identity controls, MFA, and sound policy design. A poorly configured ZTNA tool can still leave gaps.
2. Can ZTNA completely replace a VPN?
Often, but not always. Some legacy applications and network admin tasks still need a VPN. Many companies keep a restricted VPN for those cases during and after the transition.
3. Is ZTNA the same as zero trust?
No. Zero trust is a security model that applies across identity, devices, networks, applications, and data. ZTNA is one technology that applies zero trust principles to remote access.
4. Does ZTNA work for small businesses?
Yes, many ZTNA tools suit small teams, especially those that rely on cloud apps and a central identity provider. The value grows as headcount, locations, and customer security requirements increase. Readiness depends more on identity and device management than on company size.
5. Does ZTNA slow down internet performance?
ZTNA can improve performance for cloud apps by avoiding routing traffic through a central office gateway. Results depend on the provider's network and your app locations. A pilot reveals real-world impact before a full rollout.
