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There is no universal winner among Zscaler, Cisco Secure Access, and Palo Alto Networks Prisma Access. Zscaler is a natural fit for cloud-first, identity-based security; Cisco can be compelling when its networking and security ecosystem is already established; and Prisma Access is an especially relevant option for organizations extending Palo Alto’s firewall and threat-prevention approach into cloud-delivered security. The right choice depends on the applications, users, branches, existing tools, and licenses you actually have—not a vendor’s “leader” label.
This comparison focuses on Security Service Edge (SSE): cloud-delivered security for internet and SaaS traffic and access to private applications. It distinguishes SSE from SASE, which adds networking capabilities such as SD-WAN. Product names can conceal different bundles and add-ons, so compare the functions and editions in a proposal rather than assuming that similarly named platforms include the same things.
At a glance
| Platform | How to think about it | Likely fit |
|---|---|---|
| Zscaler Zero Trust Exchange | A cloud-native, proxy-centered SSE platform, with Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA) as major components. | Distributed organizations prioritizing secure internet and SaaS access, application-specific private access, and reduced reliance on traditional VPNs and data-center inspection. |
| Cisco Secure Access | A cloud-delivered SSE offering that connects with Cisco’s broader security and networking portfolio. | Organizations with significant Cisco investments in products such as Secure Client, Umbrella, Catalyst SD-WAN, or related management and security services. |
| Palo Alto Networks Prisma Access | Cloud-delivered security built around Palo Alto’s network-security and threat-prevention approach; it can be part of a broader Prisma SASE strategy. | Organizations seeking continuity with Palo Alto firewall operations and considering a wider combination of remote-user and branch security. |
These are practical fit descriptions, not a universal ranking. Gartner’s 2025 Magic Quadrant for Security Service Edge identifies the vendors evaluated in its public abstract; its “leaders” terminology should not be stretched into a claim that all three vendors hold the same analyst position.
What SSE covers—and what it does not
SSE is the security part of Secure Access Service Edge (SASE). Depending on the product and edition, an SSE platform can bring together a secure web gateway (SWG), zero-trust network access (ZTNA), cloud access security broker (CASB), firewall as a service (FWaaS), data loss prevention (DLP), remote browser isolation (RBI), DNS security, and digital experience monitoring (DEM). The aim is to apply security policy to users, devices, applications, and data through cloud-delivered enforcement rather than relying only on data-center appliances or VPN concentrators.
#1 Best Overall
- INTEGRATED FIREWALL APPLIANCE AND SECURITY SERVICES: Comes with FortiGate-40F Firewall Appliance, 1 year of FortiCare Premium, and FortiGuard Unified Threat Protection.
- UTP SECURITY FEATURES: Offers protection from advanced threats with DNS filtering, URL filtering, video filtering, and controls against botnets.
- IDEAL FOR SMALLER SETTINGS: Best suited for small to mid-sized businesses needing reliable security without the complexity of larger systems.
- CONTINUOUS SUPPORT AND MAINTENANCE: FortiCare Premium ensures that technical help is readily available to manage and troubleshoot issues.
- COMPACT AND EFFECTIVE: Provides a powerful, yet compact security solution that effectively protects against a wide range of cyber threats.
SASE adds the networking side, especially SD-WAN and branch connectivity. A company replacing a remote-access VPN may need SSE; a company redesigning how branches connect may need to evaluate a broader SASE design. The terms are related, not interchangeable. See the vendors’ overviews of Zscaler SSE, Cisco SSE packages, and Palo Alto Prisma SASE.
Moving to SSE does not automatically remove every firewall, router, endpoint agent, private-network route, data-center control, or identity-management task. It changes where and how some controls are enforced. Traffic steering, certificates, identity synchronization, application connectors, log retention, data residency, and exceptions still need deliberate design.
What the product names mean
Zscaler: Zero Trust Exchange, ZIA, and ZPA
Zscaler’s model centers on the Zero Trust Exchange and cloud-delivered inspection. Zscaler Internet Access addresses internet and SaaS access; Zscaler Private Access provides access to private applications without treating users as if they need broad access to the surrounding network. Zscaler describes its approach as proxy-based, inspecting traffic inline. Buyers should verify which modules, agents, traffic-steering methods, and data-protection services are included in their proposed package.
Cisco: Secure Access and its surrounding ecosystem
Cisco Secure Access is positioned around a shared subscription, policy set, and dashboard for its offering, with broader and narrower package options, including Secure Internet Access and Secure Private Access. Cisco’s ecosystem may also include Secure Client, Umbrella, Catalyst SD-WAN, Identity Services Engine, Talos threat intelligence, and Cisco Cloud Control. How useful those connections are depends on the products already deployed and the specific package purchased.
Rank #2
- Compact and Efficient Design: The FortiGate 40F is designed for small to mid-sized businesses and enterprise branch offices, featuring a compact, fanless desktop form factor that ensures quiet operation and minimizes space usage.
- Robust Connectivity Options: Equipped with 5 GE RJ45 ports, including 1 WAN port and 4 internal ports, this model provides essential connectivity and flexibility for various network configurations in a small-scale environment.
- High-Performance Security: Offers up to 1 Gbps IPS throughput and 600 Mbps threat protection throughput, using Fortinet’s purpose-built security processor technology to deliver industry-leading performance and protection for SSL encrypted traffic.
- Advanced Threat Protection: Integrated with Fortinet’s AI-powered FortiGuard Labs, the FortiGate 40F offers comprehensive cybersecurity, identifying and mitigating both known and unknown threats to maintain robust security across your network.
- Simplified Management and Deployment: Features a user-friendly management console that provides comprehensive network automation and visibility, coupled with Zero Touch Integration with Fortinet’s Security Fabric for easy deployment.
Do not treat “Cisco supports this feature” as proof that it is included in a particular quote. Cisco’s package comparison guide maps capabilities such as SWG, ZTNA, CASB, FWaaS, DLP, RBI, DEM, VPN-as-a-service, reserved IP, and AI-app controls to different packages, editions, or add-ons.
Palo Alto Networks: Prisma Access and Prisma SASE
Prisma Access delivers cloud-based security services using Palo Alto’s security policy and threat-prevention approach. Palo Alto lists capabilities including ZTNA, SWG, CASB, Prisma Agent, RBI, and FWaaS. Prisma SASE can extend the scope to Prisma SD-WAN, Prisma Browser, and Strata Cloud Manager. The relevant question is not just whether those components exist, but whether your proposed edition and deployment include the functions and management model you need.
Palo Alto’s Prisma Access licensing documentation describes Secure Web Gateway, ZTNA, and Enterprise editions, as well as supporting-service and deployment considerations. Confirm which administration plane—such as Panorama or Strata Cloud Manager—fits your operating model and which additional licenses or services are required.
The Tool Desk
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| Area | Questions for every vendor | What to watch |
|---|---|---|
| Internet and SaaS access | How are web traffic, TLS inspection, URL filtering, malware and phishing prevention, DNS security, and SaaS discovery handled? | Test your actual applications and traffic paths. Confirm how exclusions, local breakout, and regional routing work. |
| Private applications | Can the service provide application-level access, clientless access where needed, and the protocols your users rely on? | ZTNA is not automatically a replacement for every VPN or network connection. |
| Data protection | Which DLP and CASB controls work inline, through APIs, at the endpoint, or across multiple channels? | Features may require higher-tier packages, separate services, endpoint agents, or add-ons. |
| Identity and device posture | How does policy use the identity provider, device management, endpoint security, certificates, and conditional-access signals? | Plan for identity-provider, agent, certificate, and directory synchronization outages. |
| Branch and network services | Can your existing SD-WAN and routing remain, or are additional components needed? | Distinguish an SSE purchase from a full SASE redesign. |
| Operations | How many consoles and agents are needed? Can administrators test policy changes, investigate events, search logs, and export evidence? | “Single pane of glass” is a claim to verify against the exact products in scope. |
| Commercial terms | What is included, how is it licensed, and what are the retention and support terms? | Build a feature-to-SKU matrix and three-year total-cost estimate. |
Internet and SaaS security
All three vendors address secure internet and SaaS access, but advertised capability names are not enough to predict how well a service will work for a particular organization. Zscaler emphasizes inline web inspection and cloud delivery; Cisco documents web, DNS, data-protection, AI-app, and other controls across its packages; Palo Alto emphasizes cloud-delivered security tied to its threat-prevention approach and Prisma services. Review the relevant materials from Zscaler, Cisco, and Palo Alto, then validate the proposed entitlements in writing.
Rank #3
- SonicWall NSa4700 Appliance Only - No Service Subscription (02-SSC-4328) - Delivers very high firewall and threat prevention throughput with millions of concurrent connections for large enterprise networks and aggregation sites.
- Defends against ransomware, zero-day exploits, and encrypted malware with Capture ATP sandboxing and RTDMI for precise detection and blocking.
- Enterprise connectivity with multiple 10 GbE SFP+ and 1 GbE ports supports bandwidth-heavy applications and east-west segmentation.
- Scales for thousands of VPN tunnels and large remote workforces, enabling secure connectivity across global sites and data centers.
- Redundant power options and high availability modes provide resiliency for mission-critical operations.
For a proof of concept, use the SaaS services employees actually depend on—such as Microsoft 365, Google Workspace, Slack, Zoom, or GitHub—and test more than a successful login. Check upload and download policies, DLP behavior, shadow-IT visibility, risky AI-app controls, browser isolation, large-file handling, and developer workflows. Include TLS inspection: certificate-pinned applications, custom trust stores, and some embedded clients may need narrowly scoped decryption exceptions. Track the number and scope of exceptions; broad bypasses can undermine the security policy you intended to apply.
Performance is geography- and application-dependent. Measure response time, file-transfer throughput, video-call quality, TLS inspection impact, and service-edge selection for real user locations. Test failover and regional disruption as well. Zscaler has stated that its web-security service is delivered from more than 160 global edge locations; that is a vendor-reported network figure, not a head-to-head performance measurement. Palo Alto publishes uptime and performance claims for Prisma Access; check their scope, measurement method, covered regions, and contractual terms rather than treating marketing figures as independent test results. Cisco’s cloud-delivery and network-integration positioning likewise does not substitute for testing from your offices and user locations.
Private applications: test the VPN use cases you actually have
Application-level ZTNA can narrow access to a specific application rather than placing a user on a broad network. That is useful for many remote-work scenarios, but access requirements vary. Zscaler Private Access emphasizes application-specific private access; Cisco Secure Private Access also advertises VPN-as-a-service capabilities in relevant packages; Prisma Access offers ZTNA licensing. The details depend on the application, package, endpoint, and deployment.
Inventory the protocols and dependencies before calling any option a full VPN replacement. Include web applications, SSH, RDP, SMB, databases, thick clients, VoIP, UDP, private DNS, systems that require fixed source IP addresses, and tools that expect network adjacency. Test applications in multiple clouds, overlapping address ranges, and applications that cannot run an endpoint agent. For contractors, evaluate whether clientless or browser-based access meets the use case and whether it provides the controls and logging your organization requires.
Rank #4
- 150W High Output Power Supply – Delivers stable 12V DC 12.5A output for Sophos XGS desktop firewall appliances requiring a 150W external power adapter. Designed for continuous network security operation in business and enterprise environments.
- Compatible Sophos XGS Models – Compatible with Sophos XGS 116, XGS 116w, XGS 118, XGS 118w, XGS 126, XGS 126w, XGS 128, XGS 128w, XGS 136, XGS 136w and XGS 138 firewall security appliances.
- Reliable Enterprise Performance – Built for firewall, network gateway and security appliance applications where stable power delivery is critical for uninterrupted network operation and security services.
- Universal AC Input – Supports worldwide input voltage 100-240V AC, 50/60Hz for business, IT deployment and enterprise network installations across multiple regions.
- Professional Replacement Power Solution – Ideal replacement for aging, damaged or missing power adapters used with Sophos XGS Series security appliances. Provides dependable power for long-term deployment in office, MSP, education and enterprise environments.
Also plan for failure: What happens if a connector, identity provider, endpoint agent, or service edge is unavailable? Define the fallback method and restrict it to what users need. Break-glass access should be tested and audited, not improvised during an outage.
Data security and AI controls: look past feature labels
DLP and CASB can refer to materially different controls. One product might inspect traffic inline, another may use SaaS API integrations, and a broader data-security program may also require endpoint enforcement or separate services. Before comparing quotes, ask whether policies cover uploads, downloads, copy-and-paste, private applications, sanctioned and unsanctioned SaaS, and the AI applications employees use. Ask which controls need TLS inspection, what happens when a device is unmanaged, and whether logs can be retained and exported in a way that meets your investigation and compliance needs.
Require an exact answer on policy scope, accuracy, exceptions, audit trails, regional data handling, log retention, and any separate charges. The Cisco package guide distinguishes capabilities by package and add-on; Palo Alto’s SaaS security information and Prisma licensing materials should likewise be read alongside the specific proposal. A capability on a product page is not necessarily part of the edition under consideration.
Which platform fits which organization?
- Consider Zscaler if your priority is cloud-first protection for distributed users, secure internet and SaaS access, and application-specific private access. It is a logical shortlist choice when you want a specialized SSE approach, but test unusual protocols, legacy network dependencies, and the modules needed to meet your requirements.
- Consider Cisco Secure Access if your organization already operates Cisco security, endpoint, or networking products and those integrations could simplify administration or migration. Cisco documents user-based pricing as typical and site-based licensing for certain packages and use cases. Compare the exact package, edition, and add-ons, and do not assume that a Cisco-heavy environment automatically guarantees simpler operations.
- Consider Prisma Access if Palo Alto firewalls and security operations are already strategic, or if you want to evaluate a broader combination of remote-user and branch services. Confirm licensing, supporting services, management plane, and whether components such as Prisma SD-WAN or Prisma Browser solve real requirements rather than just expanding the deployment.
Branch-heavy organizations should decide whether they are buying cloud-delivered security alone or changing branch connectivity too. High-compliance buyers should validate data residency, logging, retention, government-cloud availability where relevant, and audit requirements with the vendor for their region and proposed edition. Unmanaged-device and contractor access deserves a separate test: browser-based access may suit some applications, but it is not automatically equivalent to managed endpoint access.
Best Value
- Built on a purposed-built secure processor, this compact network firewall delivers the highest level of security performance and energy efficiency in its class – 2.5 Gbps IPS throughput | 1.3 Gbps threat protection | 1.4 Gbps SSL Inspection throughput.
- User-friendly management console gives you centralized visibility and simplifies policy enforcement across your network. Its zero-touch deployment helps you optimize your onboarding experience.
- Compact design equipped with 10 x GE RJ45 ports (including 7 x Internal Ports, 2 x WAN Ports, 1 x DMZ Port) provide essential connectivity and flexibility for various network configurations in branch offices.
Licensing and total cost
These are enterprise offerings, and the cited public materials do not provide a standardized numerical price that supports a fair per-user comparison. Zscaler’s pricing page presents platform bundles but directs buyers toward sales rather than publishing universal list prices. Cisco describes user-based pricing as typical and selected site-based licensing options; Palo Alto’s licensing documentation identifies editions and supporting-service considerations without giving a universal price.
Ask each vendor for a bill of materials that names every product, edition, add-on, limit, and renewal assumption. Include user or site licenses; bandwidth or remote-network charges; DLP, CASB, RBI, DEM, and advanced-threat features; reserved IPs and private-app connectors; logging and retention; endpoint agents; support; professional services; and the cost of running existing proxy or VPN controls in parallel. A lower initial quote may not be cheaper once migration, operations, and overlap are included.
Run a proof of concept with real users and applications
A useful evaluation tests the same scenarios against all shortlisted platforms. Include remote employees, branch users, contractors, different device types, and representative geographies. Use the actual identity provider, endpoint-management tools, certificates, private apps, SaaS applications, and data rules planned for production.
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- Build the proposed design. Document traffic steering, endpoint agents, private-app connectors, DNS, TLS inspection, exception handling, logging, and failover paths for each vendor.
- Test security and compatibility. Evaluate web and SaaS policy, malware and phishing controls, DLP, AI-app controls, private-app access, and the real legacy or thick-client applications that could break.
- Measure experience and operations. Record login and reconnection behavior, application response, file transfer, video quality, service-edge selection, policy-change workflow, alert usefulness, and time needed to investigate an event.
- Test failure and recovery. Simulate loss of an endpoint agent, connector, identity service, certificate, or regional service path. Verify break-glass access, alerting, and rollback.
- Validate the commercial proposal. Match every requirement to a licensed feature and document what costs extra, how logs are retained, and what service levels apply.
Do not migrate everyone at once. Start with a low-risk group, run the old and new access paths in parallel, then move internet and SaaS traffic and private applications in controlled stages. Retire legacy controls only after logging, incident response, access coverage, and rollback criteria are validated.
A practical decision rule
Choose the platform that meets your required use cases with the least risky migration and a supportable operating model. Give the proof of concept and commercial review explicit weight alongside security controls, private-app compatibility, user experience, administration, resilience, compliance, and total cost. Vendor comparisons can help identify questions, but vendor-authored scorecards are not independent testing. Treat “fastest,” “best,” “single pane of glass,” and similar claims as hypotheses to test—not as procurement evidence.
Quick Recap
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