# 8x8 vs Microsoft Teams Phone: which do AI models recommend for business phones, October 2026

IT AI Recommendation Index, October 2026 Edition, Business phone systems. One of fourteen models named 8x8 first on the direct prompt; zero named Microsoft Teams Phone. Page: https://it-ai-index.com/operations/business-phone-systems/8x8-vs-microsoft-teams-phone/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| 8x8 | 3% | #6 of 12 | 8% | 37 | 13 of 14 |
| Microsoft Teams Phone | 3% | #7 of 12 | 10% | 21 | 13 of 14 |

## The direct prompt, model by model

- Kimi K2: 8x8 first (first choices: 8x8, RingCentral RingEX) (alternatives: Dialpad, GoTo Connect, Nextiva)
- Claude Haiku 4.5: neither first, one named (first choices: RingCentral) (alternatives: 8x8, Dialpad, Nextiva)
- Gemini 3.5 Flash: neither first, one named (first choices: Dialpad, RingCentral) (alternatives: Aircall, Microsoft Teams Phone, Nextiva)
- Perplexity Sonar: neither first, one named (first choices: RingCentral) (alternatives: 8x8, Dialpad, JustCall, Nextiva)
- Grok 4.1 Fast: neither first, one named (first choices: Nextiva) (alternatives: 8x8, Ooma Office, RingCentral, Zoom Phone)
- Mistral Small: neither first, one named (first choices: RingCentral) (alternatives: 8x8, Intermedia, Nextiva, Zoom Phone)
- DeepSeek V4 Flash: neither first, one named (first choices: RingCentral) (alternatives: 8x8, Aircall, Dialpad, Nextiva)
- Qwen 3.7 Flash: neither first, one named (first choices: RingCentral) (alternatives: Microsoft Teams Phone, Nextiva, Zoom Phone)
- Muse Glimmer 30B: neither first, one named (first choices: Nextiva, RingCentral) (alternatives: 8x8, Dialpad, Zoom Phone)
- GPT-5.4 mini: neither named (first choices: RingCentral, Zoom Phone) (alternatives: Dialpad, Nextiva, Webex Calling)
- Llama 4 Maverick: neither named (first choices: Nextiva) (alternatives: JustCall, Vonage, Zoom Phone)
- GLM 4.7 FlashX: neither named (first choices: Nextiva, RingCentral RingEX) (alternatives: Dialpad Connect, GoTo Connect, Zoom Phone)
- MiniMax M2.5: neither named (first choices: Nextiva, RingCentral RingEX) (alternatives: Intermedia Unite, Zoom Phone)
- GPT-6 Luna: neither named (first choices: RingCentral RingEX) (alternatives: Dialpad, Teams Phone, Zoom Phone)

## What the models said about 8x8

- "While 8x8 has strengths, it has significant red flags... budget-conscious growing teams may find pricing unpredictable." (Qwen 3.7 Flash, negative prompt, soft negative)
- "notorious for aggressive and highly restrictive sales contracts" (Gemini 3.5 Flash, negative prompt, soft negative)
- "Support is consistently rated 1–2 stars on third-party sites." (DeepSeek V4 Flash, negative prompt, soft negative)
- "RingCentral MVP / 8x8 X Series: Full UCaaS, strong PBX features, good mid-market fit." (Kimi K2, scale prompt, first choice)
- "I'd suggest RingCentral RingEX or 8x8 as the top choices" (Kimi K2, direct prompt, first choice)
- "If you're running both sales and support operations, 8x8 is worth a serious look given its native contact center capabilities." (DeepSeek V4 Flash, paraphrase prompt, alternative)

## What the models said about Microsoft Teams Phone

- "Limitation: Poor fax capabilities—avoid if you need to send/receive faxes" (Kimi K2, negative prompt, hard negative)
- "The configuration complexity of platforms like Microsoft Teams Phone or RingCentral can be significant overhead for a 15-person professional services firm" (Claude Haiku 4.5, negative prompt, soft negative)
- "The Best All-Around Choice: Microsoft Teams ... Teams is almost invariably the correct choice." (Qwen 3.7 Flash, paraphrase prompt, first choice)
- "The default choice if you are deeply embedded in the Microsoft 365 ecosystem." (Gemini 3.5 Flash, scale prompt, first choice)
- "if your company is already committed to the Microsoft ecosystem, Microsoft Teams is a natural fit and more cost-effective" (Claude Haiku 4.5, 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.