# Vitally vs ClientSuccess: which do AI models recommend for customer success, September 2026

GTM AI Recommendation Index, September 2026 Edition, Customer success platforms. Six of twelve models named Vitally first on the direct prompt; one named ClientSuccess. Page: https://gtm-ai-index.com/customer/customer-success-platforms/vitally-vs-clientsuccess/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Vitally | 23% | #2 of 10 | 12% | 50 | 12 of 12 |
| ClientSuccess | 2% | #7 of 10 | 14% | 35 | 11 of 12 |

## The direct prompt, model by model

- Claude Haiku 4.5: vitally first (first choices: Vitally) (alternatives: ChurnZero, Custify, Totango)
- Gemini 3.5 Flash: vitally first (first choices: Vitally) (alternatives: ChurnZero, Planhat, Totango)
- Mistral Small: vitally first (first choices: ChurnZero, Vitally) (alternatives: ClientSuccess, Custify, Gainsight, Planhat)
- DeepSeek V4 Flash: vitally first (first choices: Vitally) (alternatives: Catalyst, ChurnZero, Planhat)
- GLM 4.7 FlashX: vitally first (first choices: Vitally) (alternatives: ChurnZero, Custify, Planhat)
- MiniMax M2.5: vitally first (first choices: ChurnZero, Vitally) (alternatives: ClientSuccess, Planhat)
- Qwen 3.7 Flash: clientsuccess first (first choices: ChurnZero, ClientSuccess) (alternatives: Skalin)
- Perplexity Sonar: neither first, one named (first choices: ChurnZero) (alternatives: ClientSuccess, Gainsight, Planhat, Vitally)
- Grok 4.1 Fast: neither first, one named (first choices: ChurnZero) (alternatives: ClientSuccess, Custify, Gainsight, Planhat, Vitally)
- Llama 4 Maverick: neither first, one named (first choices: ChurnZero) (alternatives: ClientSuccess, Planhat, Vitally)
- Kimi K2: neither first, one named (first choices: ChurnZero) (alternatives: ClientSuccess, Custify, Planhat, Vitally)
- GPT-5.4 mini: neither named (first choices: ChurnZero) (alternatives: Gainsight, Totango)

## What the models said about Vitally

- "Avoid pricier options like ... Vitally/ChurnZero (custom, $1K+/month)" (Grok 4.1 Fast, budget prompt, hard negative)
- "What to Avoid on a Budget ... generally not where you should start" (DeepSeek V4 Flash, budget prompt, hard negative)
- "Be Cautious If: You want quick, simple setups and do not have technical resources to manage filtering logic." (Gemini 3.5 Flash, negative prompt, soft negative)
- "Start with Vitally for most mid-market companies - it offers the best balance of features, pricing, and modern UX" (GLM 4.7 FlashX, direct prompt, first choice)
- "Vitally is the strongest overall choice and the default pick most CS analysts point mid-market teams to first" (DeepSeek V4 Flash, paraphrase prompt, first choice)
- "Vitally — If you want fast time-to-value, modern UX, and strong product analytics integration" (Kimi K2, scale prompt, first choice)

## What the models said about ClientSuccess

- "ClientSuccess has received several concerning reviews highlighting: Limited customization... Poor customer service" (MiniMax M2.5, negative prompt, hard negative)
- "What to Avoid on a Budget ... generally not where you should start" (DeepSeek V4 Flash, budget prompt, hard negative)
- "Avoid: Gainsight, ClientSuccess, Salesforce Service Cloud" (GLM 4.7 FlashX, negative prompt, hard negative)
- "Start with ChurnZero or ClientSuccess demos—they're the most commonly recommended for your segment" (Qwen 3.7 Flash, direct prompt, first choice)
- "If you want a simple, clean workspace and need to be up and running by next month: Go with ClientSuccess or Custify." (Gemini 3.5 Flash, comparative prompt, alternative)
- "Choose Custify or ClientSuccess if: ... startup needing affordable, flexible solutions" (Kimi K2, comparative prompt, alternative)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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.