# Cisco Duo vs Microsoft Authenticator: which do AI models recommend for MFA, October 2026

IT AI Recommendation Index, October 2026 Edition, Multi-factor authentication. Nine of fourteen models named Cisco Duo first on the direct prompt; zero named Microsoft Authenticator. Page: https://it-ai-index.com/identity/multi-factor-authentication/cisco-duo-vs-microsoft-authenticator/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Cisco Duo | 47% | #1 of 11 | 6% | 63 | 14 of 14 |
| Microsoft Authenticator | 2% | #4 of 11 | 19% | 21 | 10 of 14 |

## The direct prompt, model by model

- Gemini 3.5 Flash: cisco duo first (first choices: Cisco Duo) (alternatives: JumpCloud Protect, Microsoft Entra ID, Okta Verify)
- Perplexity Sonar: cisco duo first (first choices: Cisco Duo) (alternatives: Okta Verify, OneLogin MFA, WorkOS)
- Grok 4.1 Fast: cisco duo first (first choices: Cisco Duo) (alternatives: JumpCloud Protect, Microsoft Entra ID)
- Mistral Small: cisco duo first (first choices: Cisco Duo, Okta Verify) (alternatives: Microsoft Entra ID)
- DeepSeek V4 Flash: cisco duo first (first choices: Cisco Duo, Microsoft Entra ID) (alternatives: JumpCloud MFA)
- Kimi K2: cisco duo first (first choices: Cisco Duo) (alternatives: Microsoft Entra ID, Okta Verify)
- GLM 4.7 FlashX: cisco duo first (first choices: Cisco Duo) (alternatives: JumpCloud MFA, Microsoft Entra ID, Okta Verify, OneLogin MFA)
- MiniMax M2.5: cisco duo first (first choices: Cisco Duo) (alternatives: Microsoft Entra ID, Okta Verify)
- Muse Glimmer 30B: cisco duo first (first choices: Cisco Duo) (alternatives: Microsoft Entra ID, Okta Verify, PingOne MFA, SafeNet Trusted Access, SecureAuth Arculix)
- GPT-5.4 mini: neither first, one named (first choices: Microsoft Entra ID) (alternatives: Cisco Duo, Okta Verify)
- Qwen 3.7 Flash: neither first, one named (first choices: Microsoft Entra ID) (alternatives: Cisco Duo, Okta Verify, YubiKey)
- GPT-6 Luna: neither first, one named (first choices: Microsoft Entra ID) (alternatives: Cisco Duo, Okta Verify)
- Claude Haiku 4.5: neither named (first choices: Microsoft Entra ID, Okta Verify)
- Llama 4 Maverick: neither named

## What the models said about Cisco Duo

- "Duo and Okta are established options, though their pricing is typically quote-based rather than simple low-cost self-serve pricing" (GPT-5.4 mini, budget prompt, soft negative)
- "Push notifications (e.g., "Approve login?" on apps like Duo, Microsoft Authenticator push): Susceptible to MFA fatigue/bombing" (Grok 4.1 Fast, negative prompt, soft negative)
- "Only use push notification systems (like Microsoft Authenticator or Duo) if they are configured to require Number Matching" (Gemini 3.5 Flash, negative prompt, soft negative)
- "Best overall for mid-market B2B: Cisco Duo – MFA-first product with strong phishing-resistant auth (FIDO2/WebAuthn), device trust, and easy deployment." (MiniMax M2.5, direct prompt, first choice)
- "Duo Security (Cisco) — it offers the best balance of security, ease of deployment, user experience, and pricing for mid-sized B2B companies." (MiniMax M2.5, paraphrase prompt, first choice)
- "Choose Cisco Duo if you want best-in-class ease of deployment and user experience for core MFA with minimal IAM overhead." (Muse Glimmer 30B, direct prompt, first choice)

## What the models said about Microsoft Authenticator

- "Only use push notification systems (like Microsoft Authenticator or Duo) if they are configured to require Number Matching" (Gemini 3.5 Flash, negative prompt, soft negative)
- "These aren't full enterprise MFA solutions on their own ... They lack central management, enforcement, or reporting." (DeepSeek V4 Flash, budget prompt, soft negative)
- "TOTP Authenticator Apps (Google Authenticator, Authy, Microsoft Authenticator) ... are phishable." (DeepSeek V4 Flash, negative prompt, soft negative)
- "start with Microsoft Authenticator (if using M365) or Duo Free — both offer solid security with minimal cost" (MiniMax M2.5, budget prompt, first choice)
- "Microsoft\u2019s own guidance highlights Authenticator, FIDO2 security keys/passkeys, certificate-based auth, and Windows Hello for Business" (GPT-5.4 mini, comparative prompt, alternative)
- "Using apps like Google Authenticator, Microsoft Authenticator, or Authy is completely free" (Mistral Small, budget 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.