# ChurnZero vs Gainsight Customer Success: which do AI models recommend for customer success, October 2026

GTM AI Recommendation Index, October 2026 Edition, Customer success platforms. Eleven of fourteen models named ChurnZero first on the direct prompt; zero named Gainsight Customer Success. Page: https://gtm-ai-index.com/customer/customer-success-platforms/churnzero-vs-gainsight-customer-success/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| ChurnZero | 42% | #1 of 10 | 17% | 64 | 14 of 14 |
| Gainsight Customer Success | 2% | #8 of 10 | 54% | 59 | 14 of 14 |

## The direct prompt, model by model

- GPT-5.4 mini: churnzero first (first choices: ChurnZero, Planhat) (alternatives: Gainsight Customer Success)
- Gemini 3.5 Flash: churnzero first (first choices: ChurnZero) (alternatives: Planhat, Totango, Vitally)
- Perplexity Sonar: churnzero first (first choices: ChurnZero) (alternatives: Vitally)
- Grok 4.1 Fast: churnzero first (first choices: ChurnZero) (alternatives: Custify, Vitally)
- Llama 4 Maverick: churnzero first (first choices: ChurnZero) (alternatives: Skalin, Userpilot, Vitally)
- Qwen 3.7 Flash: churnzero first (first choices: ChurnZero, Vitally) (alternatives: Custify, HubSpot Service Hub, Skalin, Totango)
- Kimi K2: churnzero first (first choices: ChurnZero) (alternatives: Totango, Vitally)
- GLM 4.7 FlashX: churnzero first (first choices: ChurnZero, Vitally) (alternatives: Totango)
- MiniMax M2.5: churnzero first (first choices: ChurnZero, Skalin) (alternatives: Totango, Vitally)
- GPT-6 Luna: churnzero first (first choices: ChurnZero) (alternatives: Planhat, Vitally)
- Muse Glimmer 30B: churnzero first (first choices: ChurnZero) (alternatives: ClientSuccess, Custify, Planhat, Skalin, Totango, Vitally)
- Claude Haiku 4.5: neither first, one named (first choices: Vitally) (alternatives: ChurnZero, ClientSuccess)
- Mistral Small: neither first, one named (first choices: Skalin) (alternatives: ChurnZero, Custify, Gainsight Customer Success, Planhat, Vitally)
- DeepSeek V4 Flash: neither first, one named (first choices: Skalin) (alternatives: ChurnZero, ClientSuccess, Custify, Totango, Vitally)

## What the models said about ChurnZero

- "Avoid enterprise platforms like Gainsight or ChurnZero initially" (Kimi K2, budget prompt, hard negative)
- "Pricing Escalation... Declining Support Quality... Clunky UI" (Kimi K2, negative prompt, hard negative)
- "Don't assume it will be plug-and-play... admins handling implementation, data, and advanced features may need extra time" (GPT-6 Luna, negative prompt, soft negative)
- "I'd start with ChurnZero. It's usually the best balance of speed, usability, and core retention functionality for mid-market teams." (GPT-5.4 mini, paraphrase prompt, first choice)
- "ChurnZero is the common first choice for health scoring, real-time usage-based risk alerts and automated retention playbooks" (Muse Glimmer 30B, paraphrase prompt, first choice)
- "ChurnZero – the strongest mid-market generalist. Repeatedly called out as the strongest mid-market option in the category." (Muse Glimmer 30B, direct prompt, first choice)

## What the models said about Gainsight Customer Success

- "Gainsight is the most complex, most expensive platform, and one most likely to fail adoption tests at companies that aren't ready for it" (Claude Haiku 4.5, negative prompt, hard negative)
- "Avoid Gainsight if you have a team of fewer than 10 to 15 CSMs or lack a dedicated CS Operations resource." (Gemini 3.5 Flash, negative prompt, hard negative)
- "Platforms with Documented Concerns ### Gainsight ⚠️ ... Security Incident (Nov 2025)... High Cost" (Kimi K2, negative prompt, hard negative)
- "Gainsight — *The Enterprise Leader* ... The most mature, feature-rich platform on the market" (DeepSeek V4 Flash, comparative prompt, first choice)
- "Gainsight: Leader in Gartner MQ and Forrester Wave; dominant in G2 reviews." (Grok 4.1 Fast, comparative prompt, first choice)
- "Most feature-rich platform on the market ... Gartner Magic Quadrant leader" (MiniMax M2.5, comparative prompt, first choice)

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.