VPN to ZTNA Migration Services
Compare VPN to ZTNA migration services. Real costs ($40–$200 per user/yr), 9-month timelines, phased migration roadmaps. 10 vetted firms.
Key findings
Risk of inactionVPN appliances remain among the most actively exploited enterprise infrastructure. The 2024 Ivanti and Fortinet mass-exploitation incidents compromised thousands of organizations that hadn't patched or migrated. Each year of VPN dependency extends exposure to this attack surface.
On this page
- The "Lateral Movement" Problem
- Technical Deep Dive
- 1. Clientless vs. Agent-based ZTNA
- 2. Identity is the New Firewall
- 3. Microsegmentation: The "Kill the VPN" Strategy
- Cost Comparison: VPN vs. ZTNA
- Typical VPN to ZTNA Migration Roadmap
- Phase 1: Discovery & Identity Prep (Months 1-2)
- Phase 2: The "Low Hanging Fruit" (Months 3-4)
- Phase 3: General Workforce & SaaS (Months 5-6)
- Phase 4: Legacy & Decommission (Months 7+)
- Architecture Transformation
- Top VPN to ZTNA Migration Services Companies
- How to Choose a VPN to ZTNA Migration Partner
- Top 3 Reasons VPN to ZTNA Migrations Fail
- 1. The "Network Extension" Trap (45% of failures)
- 2. Ignoring Unmanaged Devices (30% of failures)
- 3. Legacy App Protocol Incompatibility (25% of failures)
- When NOT to Migrate to ZTNA
- When to Hire VPN to ZTNA Migration Services
- 1. The Hardware Refresh
- 2. The Merger & Acquisition
- 3. The Compliance Audit
- Total Cost of Ownership: VPN vs ZTNA
- Risk Factors
- Lateral Movement Risk
- User Experience Friction
- Legacy App Compatibility
- Feasibility Analysis
- Ideal candidates
The "Lateral Movement" Problem
Traditional VPNs are a security relic. They operate on a "castle and moat" model: once a user authenticates, they are inside the network and often have broad access to scan and move laterally. In an era of ransomware, this is a critical vulnerability.
Zero Trust Network Access (ZTNA) flips this model. It grants access to specific applications, not the network. Users are never "on the network"; they are merely authorized to see specific apps based on identity and context.
Technical Deep Dive
1. Clientless vs. Agent-based ZTNA
- Clientless (Browser-based): Great for contractors or unmanaged devices. Users access a portal and launch web apps. No software to install.
- Limitation: Only works for web apps (HTTP/HTTPS), RDP, and SSH.
- Agent-based (Tunnel): A lightweight agent on the device intercepts traffic and routes it to the ZTNA broker.
- Advantage: Supports all ports/protocols and provides device posture checks (e.g., "Is the OS patched?").
2. Identity is the New Firewall
In ZTNA, your Identity Provider (IdP) like Okta or Entra ID becomes the control plane.
- Policy: "Marketing Group" can access "Salesforce" and "Intranet", but not "Production DB".
- Context: Access is denied if the user is logging in from an unknown country or a jailbroken device.
3. Microsegmentation: The "Kill the VPN" Strategy
You can't just turn off the VPN on Monday. You need to map applications to users.
- Discovery: Use the ZTNA agent in "monitor mode" to see what apps users are actually accessing.
- Policy Creation: Build granular policies based on observed traffic.
- Enforcement: Switch to "block mode" one department at a time.
Cost Comparison: VPN vs. ZTNA
| Feature | Legacy VPN | ZTNA |
|---|---|---|
| Licensing | Concurrent user licenses + Hardware maintenance | Per-user/month subscription |
| Hardware | Expensive Concentrators (CapEx) | Cloud-delivered (OpEx) |
| Bandwidth | Hairpinning traffic costs bandwidth | Direct-to-app (Internet offload) |
| Security Ops | High (Patching appliances) | Low (SaaS model) |
Hidden Cost: The cost of a breach. VPNs are the #1 entry point for ransomware. ZTNA drastically reduces the blast radius.
Typical VPN to ZTNA Migration Roadmap
Phase 1: Discovery & Identity Prep (Months 1-2)
Activities:
- Integrate IdP (Entra ID/Okta) with ZTNA provider.
- Deploy ZTNA connectors in data centers/cloud VPCs.
- Run agents in "Discovery Mode" to map traffic.
Deliverables:
- Application Inventory.
- Identity-based Access Policies.
Phase 2: The "Low Hanging Fruit" (Months 3-4)
Activities:
- Migrate Contractors and Third Parties to Clientless ZTNA.
- Migrate Developers to Agent-based ZTNA for SSH/RDP access.
- Why? These are high-risk groups. Securing them first adds immediate value.
Deliverables:
- VPN access revoked for contractors.
- Secure remote access for devs.
Phase 3: General Workforce & SaaS (Months 5-6)
Activities:
- Route private web apps through ZTNA.
- Enable device posture checks (e.g., block access if antivirus is off).
- Begin phasing out VPN client for general staff.
Deliverables:
- 90% of workforce off VPN.
Phase 4: Legacy & Decommission (Months 7+)
Activities:
- Address "thick client" legacy apps requiring specific protocols.
- Keep a minimal VPN for "break glass" scenarios (if needed).
- Decommission VPN concentrators.
Deliverables:
- Hardware retired.
- Zero Trust architecture fully operational.
Architecture Transformation
Top VPN to ZTNA Migration Services Companies
We analyzed 20+ VPN to ZTNA migration services companies based on:
- ZTNA broker expertise: Zscaler, Cloudflare, Palo Alto, Netskope specializations
- Phased migration methodology: Discovery → Pilot → Rollout (not "Big Bang")
- Pricing transparency: Per-user costs, PoC pricing, enterprise vs. mid-market
How to Choose a VPN to ZTNA Migration Partner
If you need a full SASE transformation: Accenture or Wipro. They can overhaul your entire network (SD-WAN + ZTNA + SWG).
If you are Microsoft-centric: Avanade (via Accenture) or HCLTech. They have deep expertise in Entra Private Access and the Microsoft security stack.
If you need rapid user adoption: Slalom. Their change management focus ensures users don't revolt against the new access methods.
Red flags:
- Vendors who suggest "Network Extension" mode for everything (recreating the VPN).
- Ignoring the "Unmanaged Device" use case.
- Lack of integration with your existing EDR/MDM tools (CrowdStrike, Intune).
Top 3 Reasons VPN to ZTNA Migrations Fail
35% of migrations fail. Click for prevention strategies.
1. The "Network Extension" Trap (45% of failures)
The Problem: Vendors configure ZTNA in "Network Extension" mode, which replicates VPN behavior (full network access via ZTNA). The Reality: This defeats the purpose. You've just moved your VPN to the cloud without gaining Zero Trust benefits. Prevention: Insist on application-level segmentation from Day 1.
2. Ignoring Unmanaged Devices (30% of failures)
The Problem: Contractors, partners, and BYOD users can't install agents. The Reality: They keep using the old VPN, which you can't sunset. Prevention: Deploy clientless ZTNA (browser-based) for unmanaged devices in Phase 1.
3. Legacy App Protocol Incompatibility (25% of failures)
The Problem: Apps using custom protocols (VOIP, active FTP, SAP GUI) break. The Reality: ZTNA works great for HTTP/HTTPS but struggles with legacy protocols. Prevention: Test legacy apps in PoC environment BEFORE production cutover.
When NOT to Migrate to ZTNA
Zero Trust isn't always the answer. Keep your VPN if:
- Ultra-secure government networks: Air-gapped systems with no internet access require on-prem VPN.
- Short-term projects (<6 months): Migration ROI requires 12-18 months to break even.
- No modern Identity Provider: ZTNA requires Okta/Entra ID. If you're still on pure on-prem Active Directory, modernize identity first.
- Mainframe-only environments: Legacy mainframes with 3270 emulation don't benefit from ZTNA.
When to Hire VPN to ZTNA Migration Services
1. The Hardware Refresh
Your VPN concentrators are EOL. Buying new hardware feels like investing in fax machines. Trigger: "Budget approval needed for new Cisco ASAs."
2. The Merger & Acquisition
You need to give a new subsidiary access to apps without merging networks (which takes years). ZTNA provides instant, granular access. Trigger: "How do we onboard the acquired team next week?"
3. The Compliance Audit
Auditors are flagging "excessive access" or lack of MFA on legacy apps. ZTNA wraps legacy apps in modern auth. Trigger: "We failed the SOC2 access control control."
Total Cost of Ownership: VPN vs ZTNA
| Line Item | VPN (3 Years) | ZTNA (3 Years) |
|---|---|---|
| Hardware/Licensing | $500k (Upfront) | $360k (Subscription) |
| Bandwidth/MPLS | $200k | $50k (Internet) |
| Ops/Patching | $150k | $30k |
| Total | $850k | $440k |
Break-Even: Usually within 12-18 months, faster if avoiding a hardware refresh.
Risk Factors
Lateral Movement Risk
Legacy VPNs grant network-level access. Once an attacker compromises a VPN credential, they can move laterally across the entire flat network.
User Experience Friction
Backhauling traffic to a central concentrator adds latency, especially for distributed teams accessing SaaS apps.
Legacy App Compatibility
Some legacy apps rely on IP whitelisting or specific network protocols that don't play well with modern ZTNA brokers.
Feasibility Analysis
Ideal candidates
- Heavy reliance on SaaS applications
- Distributed workforce (WFH)
- Existing investment in modern IdP (Okta, Entra ID)
Break-even cost: Immediate ROI via reduced risk and hardware retirement Talent risk: Low. ZTNA is policy-based, easier than managing VPN concentrators.
The numbers
Verified benchmarks for VPN to ZTNA Migration Services, aggregated from analyzed projects. Figures are ranges, not point estimates.
Cost
Timeline
Success rate
Vendor pool
| Cost range | $40 – $200 per user/yr |
|---|---|
| Median cost | $100/user/year |
| Median timeline | 9 months |
| Success rate | 80% |
| Complexity | Medium |
| Typical ROI | 6–12 months |
| Projects analyzed | n=120 |
The business case
Typical ROI
6–12 months
Cost avoidance
$20k–$150k/year in VPN hardware, licensing, and helpdesk costs
Key drivers
- ZTNA eliminates lateral movement — breach impact contained to one application, not full network
- VPN concentrators are #1 attack vector in 2023–2025 (CVEs, Ivanti, Fortinet, Pulse Secure breaches)
- Better performance: ZTNA routes direct to application, no VPN backhaul latency
- Eliminates VPN hardware refresh costs ($50k–$500k for enterprise appliances)
Should you migrate?
A decision framework for VPN to ZTNA Migration Services — the conditions that favor migrating, the ones that argue against it, and the alternatives worth weighing first.
Migrate if
- Remote workforce exceeds 30% of total employees
- VPN concentrator is a performance bottleneck during peak usage
- Security posture requires least-privilege access to individual applications (not full network)
- Zero Trust security framework adoption is a board-level mandate
- SaaS-heavy environment where backhauling traffic through VPN creates latency
Don't migrate if
- Legacy applications require network-level access that ZTNA can't provide
- Compliance frameworks require specific VPN audit trails not yet available in ZTNA products
- IT team lacks zero trust architecture expertise and training budget is constrained
Alternatives to consider
| Alternative | Why | Best for |
|---|---|---|
| VPN hardware upgrade | Modernize VPN appliances — lower transition cost, zero architectural change | Organizations with primarily on-premise workloads where ZTNA benefits are limited |
| SASE (Secure Access Service Edge) | Combines ZTNA with cloud firewall, CASB, and SD-WAN in one platform | Organizations wanting full network security modernization, not just access |
Recommended Partners
ZTNA Architecture & Selection
Best for: Selecting the right ZTNA broker (Zscaler vs. Cloudflare)
SASE Implementation
Best for: Mid-market to Enterprise infrastructure modernization
Advanced Technology Center (ATC)
Best for: Proof of Concept (PoC) testing before buying
Managed ZTNA Services
Best for: European/Global organizations needing 24/7 management
Global ZTNA transformations
Best for: Fortune 500s needing full SASE implementation
Security governance & risk
Best for: Highly regulated industries (Finance, Healthcare)
Cybersecurists & infrastructure
Best for: Large-scale infrastructure overhaul
User-centric adoption
Best for: Organizations prioritizing employee experience
Managed ZTNA services
Best for: Outsourcing ongoing security operations
Related Migrations
Frequently Asked Questions
Why migrate from VPN to ZTNA?
Security and performance. ZTNA eliminates lateral movement risks and improves speed by routing traffic directly to apps, not backhauling through a data center.
Can we keep our VPN as a backup?
Yes, a phased approach often keeps VPN for legacy edge cases, but the goal should be to minimize its attack surface.
How does ZTNA handle legacy client-server apps?
Most ZTNA solutions have 'app connectors' that sit near the app to proxy traffic, but some protocols (VOIP, active FTP) can be tricky and might need specific handling.
Chief Analyst, Software Modernization Intelligence · 10+ years B2B market research
Last reviewed:
120 projects analyzed