# Customer success platforms: what AI models recommend, September 2026

GTM AI Recommendation Index, September 2026 Edition. Asked as "customer success platform" and as "customer health and retention management tool", six framings each, to twelve models with search on, on behalf of a mid-market B2B company. Page: https://gtm-ai-index.com/customer/customer-success-platforms/

**Standing:** ChurnZero leads with 39% of first choices; verdict contested. 56 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | ChurnZero | 39% | 17% | 58 |
| 2 | Vitally | 23% | 12% | 50 |
| 3 | Custify | 16% | 5% | 42 |
| 4 | HubSpot Service Hub | 5% | 13% | 15 |
| 5 | Totango | 4% | 18% | 45 |
| 6 | Skalin | 4% | 7% | 14 |
| 7 | ClientSuccess | 2% | 14% | 35 |
| 8 | Catalyst | 2% | 14% | 14 |
| 9 | Planhat | 0% | 22% | 40 |
| 10 | Gainsight | 0% | 64% | 53 |

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

- Claude Haiku 4.5: Vitally; alternatives ChurnZero, Custify, Totango
- GPT-5.4 mini: ChurnZero; alternatives Gainsight, Totango
- Gemini 3.5 Flash: Vitally; alternatives ChurnZero, Planhat, Totango
- Perplexity Sonar: ChurnZero; alternatives ClientSuccess, Gainsight, Planhat, Vitally
- Grok 4.1 Fast: ChurnZero; alternatives ClientSuccess, Custify, Gainsight, Planhat
- Mistral Small: ChurnZero, Vitally; alternatives ClientSuccess, Custify, Gainsight, Planhat
- DeepSeek V4 Flash: Vitally; alternatives Catalyst, ChurnZero, Planhat
- Llama 4 Maverick: ChurnZero; alternatives ClientSuccess, Planhat, Vitally
- Qwen 3.7 Flash: ChurnZero, ClientSuccess; alternatives Skalin
- Kimi K2: ChurnZero; alternatives ClientSuccess, Custify, Planhat, Vitally
- GLM 4.7 FlashX: Vitally; alternatives ChurnZero, Custify, Planhat
- MiniMax M2.5: ChurnZero, Vitally; alternatives ClientSuccess, Planhat

## Sources the answers cite

20 of 72 answers came back with a source list, from 4 of 12 models. Sites named in the most answers:

- usepylon.com: 9 answers, 12 citations
- userpilot.com: 9 answers, 9 citations
- gartner.com: 7 answers, 7 citations
- coworker.ai: 6 answers, 6 citations
- learn.g2.com: 5 answers, 5 citations
- oliv.ai: 5 answers, 5 citations
- aboutmartech.com: 4 answers, 5 citations
- guideflow.com: 4 answers, 5 citations

Pages named in the most answers:

- https://userpilot.com/blog/customer-success-tools (9 answers)
- https://coworker.ai/blog/customer-success-platforms (6 answers)
- https://usepylon.com/blog/csm-tools-2026 (6 answers)
- https://gartner.com/reviews/market/customer-success-management-platforms (5 answers)
- https://learn.g2.com/best-customer-success-software (5 answers)
- https://oliv.ai/blog/best-customer-success-platforms (5 answers)
- https://aboutmartech.com/blog/best-customer-success-software (4 answers)
- https://gurusup.com/blog/customer-success-software (4 answers)
- https://appcues.com/blog/customer-success-software (3 answers)
- https://ciopages.com/buyer-guides/customer-success-platform (3 answers)

## Warned against

- Gainsight: 34 of 53 labels negative. "Gainsight - has a high risk score of 57/100 and 4 documented complaints, with issues related to aggressive subscription billing, cancellation friction" (Llama 4 Maverick, negative prompt)
- ChurnZero: 10 of 58 labels negative. "Platforms to AVOID on a Limited Budget | ChurnZero | Starts at ~$849/month + $5K-25K setup fees" (Kimi K2, budget prompt)
- Totango: 8 of 45 labels negative. "Totango ⚠️ MIXED SIGNALS (Post-Merger Issues) ... 2024 merger with Catalyst created instability and uncertainty" (Mistral Small, negative prompt)
- Planhat: 9 of 40 labels negative. "What to Avoid on a Budget ... generally not where you should start" (DeepSeek V4 Flash, budget prompt)

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, September 2026 Edition, gtm-ai-index.com.