# Zscaler Private Access vs Tailscale: which do AI models recommend for ZTNA, October 2026

IT AI Recommendation Index, October 2026 Edition, Zero trust network access. One of fourteen models named Zscaler Private Access first on the direct prompt; zero named Tailscale. Page: https://it-ai-index.com/network/zero-trust-network-access/zscaler-private-access-vs-tailscale/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Zscaler Private Access | 3% | #6 of 11 | 45% | 51 | 14 of 14 |
| Tailscale | 2% | #7 of 11 | 24% | 25 | 12 of 14 |

## The direct prompt, model by model

- GPT-5.4 mini: zscaler private access first (first choices: Zscaler Private Access) (alternatives: Cloudflare One, Netskope One SSE, Prisma Access)
- Mistral Small: neither first, one named (first choices: Check Point Harmony SASE, Netskope Private Access) (alternatives: Cloudflare One, Twingate, Zscaler Private Access)
- Kimi K2: neither first, one named (first choices: Cloudflare One, Twingate) (alternatives: Cato Networks, Netskope Private Access, NordLayer, Zscaler Private Access)
- Claude Haiku 4.5: neither named (first choices: Cato Networks, Twingate) (alternatives: Cloudflare One, NordLayer)
- Gemini 3.5 Flash: neither named (first choices: Twingate) (alternatives: Cato Networks, Check Point Harmony SASE, Cloudflare One, Microsoft Entra Private Access)
- Perplexity Sonar: neither named (first choices: Cloudflare One, NordLayer) (alternatives: Cato Networks, Cisco Secure Access, Portnox)
- Grok 4.1 Fast: neither named (first choices: Cloudflare One, Twingate) (alternatives: Cato Networks, Microsoft Entra Private Access, OpenVPN CloudConnexa)
- DeepSeek V4 Flash: neither named (first choices: Cloudflare One, Twingate) (alternatives: Cato Networks, Check Point Harmony SASE, NordLayer)
- Llama 4 Maverick: neither named (first choices: Cato Networks) (alternatives: Check Point Harmony SASE, OpenVPN CloudConnexa)
- Qwen 3.7 Flash: neither named (first choices: Twingate) (alternatives: Cloudflare One, Fortinet Universal ZTNA)
- GLM 4.7 FlashX: neither named (first choices: Cato Networks) (alternatives: Check Point Harmony SASE, Cloudflare One, Fortinet FortiZTNA)
- MiniMax M2.5: neither named (first choices: Cato Networks, Cloudflare One) (alternatives: Axis Security, Banyan Security, OpenVPN CloudConnexa)
- GPT-6 Luna: neither named (first choices: Cloudflare One) (alternatives: Microsoft Entra Private Access, Twingate)
- Muse Glimmer 30B: neither named (first choices: Cloudflare One, Twingate) (alternatives: Cato Networks, Check Point Harmony SASE, Fortinet Universal ZTNA)

## What the models said about Zscaler Private Access

- "Avoid Zscaler for mid-market: It's powerful but designed for Fortune 500 scale—complex, expensive, and often overkill" (Kimi K2, paraphrase prompt, hard negative)
- "ZTNA Vendors to Approach with Caution ... Zscaler ... CVE-2025-54982: A SAML authentication bypass" (DeepSeek V4 Flash, negative prompt, hard negative)
- "CVE-2025-54982: SAML authentication bypass due to failure to validate signed assertions" (Kimi K2, negative prompt, hard negative)
- "Zscaler Private Access is the market-leading ZTNA solution, delivering inside-out connectivity that never exposes applications to the internet" (Claude Haiku 4.5, comparative prompt, first choice)
- "Complex, global enterprise needing high compliance | Zscaler Private Access | Robust, highly certified, and built for massive scale." (Gemini 3.5 Flash, comparative prompt, first choice)
- "Zscaler is often treated as the canonical pure-play ZTNA vendor... Choose Zscaler if you want a widely recognized ZTNA leader" (GPT-5.4 mini, comparative prompt, first choice)

## What the models said about Tailscale

- "Good for developer-heavy environments, but operates more at network layer (Layer 4) than true application-layer zero trust" (Kimi K2, paraphrase prompt, soft negative)
- "may lack full enterprise ZTNA compliance (e.g., advanced posture or auditing) without self-hosting effort" (Grok 4.1 Fast, budget prompt, soft negative)
- "License concerns: 2024 BSL (Business Source License) switch raised community concerns" (MiniMax M2.5, negative prompt, soft negative)
- "Pure ZTNA (e.g., Twingate, Tailscale, Cloudflare Zero Trust): Great if you just want to kill the VPN and grant app-level access. Low overhead, easy to implement." (Qwen 3.7 Flash, scale prompt, first choice)
- "Tailscale: For rapid deployment and ease of use (avoid if you need strict compliance granularities)" (Qwen 3.7 Flash, negative prompt, first choice)
- "Best for developer-friendly private networking: Tailscale, for engineering teams that need fast, lightweight secure remote access." (Muse Glimmer 30B, paraphrase prompt, alternative)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.