# RingCentral RingEX vs 8x8: which do AI models recommend for business phones, October 2026

IT AI Recommendation Index, October 2026 Edition, Business phone systems. Four of fourteen models named RingCentral RingEX first on the direct prompt; one named 8x8. Page: https://it-ai-index.com/operations/business-phone-systems/ringcentral-ringex-vs-8x8/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| RingCentral RingEX | 12% | #4 of 12 | 0% | 10 | 6 of 14 |
| 8x8 | 3% | #6 of 12 | 8% | 37 | 13 of 14 |

## The direct prompt, model by model

- Kimi K2: both first (first choices: 8x8, RingCentral RingEX) (alternatives: Dialpad, GoTo Connect, Nextiva)
- GLM 4.7 FlashX: ringcentral ringex first (first choices: Nextiva, RingCentral RingEX) (alternatives: Dialpad Connect, GoTo Connect, Zoom Phone)
- MiniMax M2.5: ringcentral ringex first (first choices: Nextiva, RingCentral RingEX) (alternatives: Intermedia Unite, Zoom Phone)
- GPT-6 Luna: ringcentral ringex first (first choices: RingCentral RingEX) (alternatives: Dialpad, Teams Phone, Zoom Phone)
- Claude Haiku 4.5: neither first, one named (first choices: RingCentral) (alternatives: 8x8, Dialpad, 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)
- 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)
- Gemini 3.5 Flash: neither named (first choices: Dialpad, RingCentral) (alternatives: Aircall, Microsoft Teams Phone, Nextiva)
- Llama 4 Maverick: neither named (first choices: Nextiva) (alternatives: JustCall, Vonage, Zoom Phone)
- Qwen 3.7 Flash: neither named (first choices: RingCentral) (alternatives: Microsoft Teams Phone, Nextiva, Zoom Phone)

## What the models said about RingCentral RingEX

- "A versatile all-around option... Want the most broadly featured standalone system? Compare RingCentral and Nextiva." (GPT-6 Luna, comparative prompt, first choice)
- "For a mid-sized B2B company, RingCentral RingEX is the strongest overall recommendation." (DeepSeek V4 Flash, paraphrase prompt, first choice)
- "### 1. RingCentral RingEX
- Best for: Enterprise teams needing deep CRM integrations" (Kimi K2, comparative prompt, first choice)

## 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)

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.