# Business phone systems for enterprise buyers: what AI models recommend, November 2026

Gane Index, November 2026 Edition. Asked as "business phone system" and as "UCaaS platform", six framings each, to fourteen models with search on, on behalf of an enterprise B2B company. Added to the November 2026 Edition. Page: https://www.gane.ai/index/it/operations/business-phone-systems/enterprise

**Standing:** RingCentral RingEX leads with 57% of first choices; verdict clear leader. 54 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [RingCentral RingEX](https://www.gane.ai/index/it/vendors/ringcentral-ringex/index.md) | 57% | 6% | 67 |
| 2 | [Microsoft Teams Phone](https://www.gane.ai/index/it/vendors/microsoft-teams-phone/index.md) | 22% | 8% | 61 |
| 3 | [Zoom Phone](https://www.gane.ai/index/it/vendors/zoom-phone/index.md) | 6% | 13% | 54 |
| 4 | [Nextiva](https://www.gane.ai/index/it/vendors/nextiva/index.md) | 4% | 9% | 23 |
| 5 | [Cisco Webex](https://www.gane.ai/index/it/vendors/cisco-webex/index.md) | 2% | 8% | 12 |
| 11 | [Cisco Webex Calling](https://www.gane.ai/index/it/vendors/cisco-webex-calling/index.md) | 0% | 4% | 26 |
| 12 | [8x8](https://www.gane.ai/index/it/vendors/8x8/index.md) | 0% | 21% | 39 |
| 13 | [Dialpad](https://www.gane.ai/index/it/vendors/dialpad/index.md) | 0% | 0% | 16 |
| 23 | [Vonage](https://www.gane.ai/index/it/vendors/vonage/index.md) | 0% | 31% | 16 |
| 74 | [Mitel](https://www.gane.ai/index/it/vendors/mitel/index.md) | 0% | 67% | 15 |
| 75 | [Avaya](https://www.gane.ai/index/it/vendors/avaya/index.md) | 0% | 79% | 14 |

Rank is by share of first choices among all 75 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: RingCentral RingEX; alternatives 8x8, Vonage
- GPT-5.4 mini: RingCentral RingEX; alternatives 8x8, Nextiva, Zoom Phone
- Gemini 3.5 Flash: RingCentral RingEX; alternatives 8x8, Cisco Webex Calling, Dialpad, Microsoft Teams Phone
- Perplexity Sonar: RingCentral RingEX; alternatives 8x8, Dialpad, JustCall, Nextiva
- Grok 4.20: RingCentral RingEX; alternatives 8x8, Cisco Webex Calling, Microsoft Teams Phone, Zoom Phone
- Mistral Small: RingCentral RingEX; alternatives 8×8 Work, Microsoft Teams Phone, Zoom Regional Unlimited & Global Select
- DeepSeek V4 Flash: RingCentral RingEX; alternatives 8x8 Work, Cisco Webex Calling, Zoom Phone
- Llama 4 Maverick: Microsoft Teams Phone, RingCentral RingEX; alternatives 8x8, CallHippo, Comcast Business, Ooma Office
- Qwen 3.7 Flash: RingCentral Ultra, RingEX; alternatives 8x8 Work, Microsoft Teams Phone, Zoom Phone
- Kimi K2: RingCentral RingEX; alternatives 8x8, Zoom Phone
- GLM 4.7 FlashX: RingCentral RingEX; alternatives 8×8 Work, Cisco Webex Calling, Microsoft Teams Phone
- MiniMax M2.5: RingCentral RingEX; alternatives 8×8 Work, Cisco Webex Calling, Microsoft Teams Phone, Nextiva
- GPT-6 Luna: RingCentral RingEX; alternatives Microsoft Teams Phone, Webex Calling
- Muse Glimmer 30B: RingCentral RingEX; alternatives 8x8 Work, Dialpad, Microsoft Teams Phone, Nextiva

## Sources the answers cite

77 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- ringcentral.com: 26 answers, 38 citations
- expertmarket.com: 24 answers, 27 citations
- nextiva.com: 23 answers, 31 citations
- techrepublic.com: 21 answers, 21 citations
- zoom.com: 19 answers, 24 citations
- crazyegg.com: 16 answers, 16 citations
- 8x8.com: 15 answers, 16 citations
- business.usnews.com: 15 answers, 15 citations

Pages named in the most answers:

- https://expertmarket.com/phone-systems/best-enterprise-phone-systems (22 answers)
- https://crazyegg.com/blog/best-business-phone-systems (16 answers)
- https://business.usnews.com/business-phone-systems/best-business-phone-systems (14 answers)
- https://gane.ai/index/it/operations/business-phone-systems/enterprise (14 answers)
- https://altigen.com/enterprise-cloud-phone-system-comparison (12 answers)
- https://vendorbenchmark.com/blog/unified-communications-pricing-benchmark-enterprise (12 answers)
- https://techrepublic.com/article/best-business-phone-systems (11 answers)
- https://costbench.com/best/best-business-phone-enterprise (10 answers)
- https://o365hq.com/blog/teams-phone-vs-ringcentral-vs-zoom-phone-vs-8x8-for-a-microsoft-365-organization (10 answers)
- https://techrepublic.com/article/best-ucaas-providers (10 answers)

## Warned against

- Mitel: 10 of 15 labels negative. "Legacy systems from brands like Avaya, NEC, Toshiba, Panasonic, and Mitel ... they should be avoided for new purchases." (Claude Haiku 4.5, negative prompt)
- Avaya: 11 of 14 labels negative. "Legacy systems from brands like Avaya, NEC, Toshiba, Panasonic, and Mitel ... they should be avoided for new purchases." (Claude Haiku 4.5, negative prompt)
- Panasonic: 7 of 7 labels negative. "Legacy on-premises PBX systems from vendors like Avaya, Panasonic, Mitel, and NEC are not recommended for new installations." (Llama 4 Maverick, negative prompt)
- 8x8: 8 of 39 labels negative. "unreliable performance, and billing surprises ... risky for mission-critical enterprise use" (Grok 4.20, negative prompt)

## Movement since October 2026

Floor: 11 points of share, measured on the calibration repeat.
Same leader: RingCentral RingEX at 57%.

- RingCentral RingEX: 43% to 57%, +14. Cleared the floor by 3 points · rank 1 of 75, unchanged.
- Microsoft Teams Phone: 31% to 22%, −9. Inside the floor by 2 points · rank 2 of 75, unchanged.
- Cisco Webex: 0% to 2%, +2. Inside the floor by 9 points · rank 15 → 5 of 75.
- 8x8: 2% to 0%, −2. Inside the floor by 9 points · rank 5 → 12 of 75.
- Zoom Phone: 5% to 6%, +1. Inside the floor by 10 points · rank 3 of 75, unchanged.
- Nextiva: 5% to 4%, −1. Inside the floor by 10 points · rank 4 of 75, unchanged.
- Cisco Webex Calling: 0% to 0%, ±0. Inside the floor by 11 points · rank 14 → 11 of 75.
- Dialpad: 0% to 0%, ±0. Inside the floor by 11 points · rank 17 → 13 of 75.
- Vonage: 0% to 0%, ±0. Inside the floor by 11 points · rank 18 → 23 of 75.
- Mitel: 0% to 0%, ±0. Inside the floor by 11 points · rank 74 of 75, unchanged.
- Avaya: 0% to 0%, ±0. Inside the floor by 11 points · rank 76 → 75 of 75.

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, November 2026 Edition, www.gane.ai/index/it.