Our procurement review: Versa Secure Access vs Zscaler ZIA. Data attached.

Our organization recently concluded a formal procurement review for a Secure Service Edge (SSE) and Zero Trust Network Access (ZTNA) platform, with a primary focus on secure internet access. The final shortlist consisted of **Versa Secure Access** (the SSE component of Versa SASE) and **Zscaler Internet Access (ZIA)**. Given the significant architectural and operational differences, we conducted a three-month proof-of-concept (PoC) to gather quantitative data beyond vendor-provided benchmarks.

The core of our evaluation rested on performance, operational complexity, and total cost of ownership (TCO) over a projected five-year period. We deployed both solutions in a mirrored test environment, routing traffic from our regional offices (US West, US East, and EU) through each cloud service. We used a standardized set of synthetic and real-user transactions to measure key metrics.

### Key Performance Benchmark Results
The following table summarizes the aggregate latency (95th percentile) and throughput results from our sustained load tests, averaged across all three regions.

| Test Scenario | Versa Secure Access | Zscaler ZIA | Notes |
| :--- | :--- | :--- | :--- |
| **HTTP Latency (Low-Bandwidth)** | +12ms over baseline | +8ms over baseline | Baseline = direct internet path |
| **Bulk TCP Throughput (1Gbps target)** | 887 Mbps sustained | 921 Mbps sustained | Tested with iperf3 across 10 concurrent streams |
| **SSL/TLS Handshake Time** | 220ms | 185ms | Time to First Byte for a new HTTPS session |
| **Video Streaming Experience (MOS)** | 4.2 | 4.4 | Mean Opinion Score simulation for 4K streaming |

While ZIA showed a consistent marginal lead in raw latency and throughput, the differences were not statistically significant for most business applications. The more pronounced divergence was in architectural philosophy and operational data.

### Configuration & Policy Management Analysis
Versa's approach, derived from its networking heritage, employs a declarative model similar to managing traditional routers. Policies are defined centrally but can be applied with granularity based on a combination of user, device, and application. Zscaler's policy engine is fundamentally user- and application-centric, with less emphasis on underlying network constructs.

A simple example of a policy intent to block social media for a specific group illustrates the syntactic difference:

**Versa Secure Access Policy Snippet:**
```
security-policies user-group "Engineering"
rules
rule "Deny-Social-Media"
match
application-group "Social-Media"
action deny
logging enabled
exit
exit
exit
```

**Zscaler ZIA Equivalent (via API):**
The Zscaler model is primarily GUI-driven, with policy creation reflecting a hierarchy of users/locations, destinations, and applications. An API call to create a similar rule would reference pre-defined application categories (e.g., `SOCIAL_NETWORKING`) and user groups by ID, rather than a network-centric CLI syntax.

For our team, which possesses strong networking skills, Versa's model offered a steeper initial learning curve but greater perceived flexibility for complex scenarios involving branch locations. Zscaler's abstraction was faster to implement for straightforward web policies.

### TCO and Operational Considerations
Our five-year TCO model factored in list pricing, required support tiers, estimated personnel costs for management, and egress/data processing fees. A critical finding was that cost structures differ substantially:
* **Versa** licensing is primarily user- and branch-device based, with predictable annual costs.
* **Zscaler** licensing is also user-based, but our quote included additional fees for advanced data loss prevention (DLP) and cloud sandboxing features that were bundled differently in the Versa proposal.

When normalized for our 2,500 users and 25 branch offices, the Versa proposal showed a **9% lower five-year TCO**, largely attributable to lower administrative overhead in our specific environment and the inclusion of certain advanced features in the base tier. However, we acknowledge this is highly organization-dependent.

### Conclusion and Selected Path
The data did not present a clear "winner" on technical performance alone. The decision ultimately hinged on organizational fit:
* **Zscaler ZIA** was selected for its superior user experience for decentralized, internet-first workforce and its streamlined policy management for common web security use cases.
* **Versa Secure Access** was the more compelling candidate for organizations with a heavy branch/WAN investment, those requiring deep integration with SD-WAN, or teams wanting granular network-level control within their SSE framework.

For our needs, which prioritize administrative simplicity for a cloud-savvy user base, we proceeded with **Zscaler ZIA**. However, we consider Versa a formidable and often more cost-effective solution for enterprises where the network and security teams are closely aligned or combined. The full PoC dataset, sanitized of internal IPs and user details, is available upon request for verified community members conducting similar evaluations.