# GrowSurf vs Open Loyalty: which do AI models recommend for loyalty, September 2026

GTM AI Recommendation Index, September 2026 Edition, Loyalty, advocacy and referrals. Two of twelve models named GrowSurf first on the direct prompt; one named Open Loyalty. Page: https://gtm-ai-index.com/marketing/loyalty-advocacy-and-referrals/growsurf-vs-open-loyalty/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| GrowSurf | 5% | #4 of 18 | 0% | 14 | 10 of 12 |
| Open Loyalty | 2% | #8 of 18 | 0% | 14 | 9 of 12 |

## The direct prompt, model by model

- Mistral Small: growsurf first (first choices: GrowSurf) (alternatives: PartnerStack, True Loyal)
- MiniMax M2.5: growsurf first (first choices: GrowSurf, Referral Rock) (alternatives: FirstPromoter, Kademi, Zinrelo)
- Perplexity Sonar: open loyalty first (first choices: CustomerGauge, Open Loyalty) (alternatives: Talon.One)
- Claude Haiku 4.5: neither first, one named (first choices: CustomerGauge) (alternatives: GrowSurf, Referral Rock, Salesforce Loyalty Management, Zinrelo)
- Llama 4 Maverick: neither first, one named (alternatives: GrowSurf, Referral Rock)
- GLM 4.7 FlashX: neither first, one named (first choices: True Loyal) (alternatives: Annex Cloud, Open Loyalty, Yotpo Loyalty & Referrals)
- GPT-5.4 mini: neither named (first choices: Ambassador) (alternatives: CustomerGauge, Referral Factory, Salesforce Loyalty Management)
- Gemini 3.5 Flash: neither named (first choices: Referral Rock) (alternatives: Annex Cloud, Influitive, PartnerStack, SaaSquatch)
- Grok 4.1 Fast: neither named (first choices: Influitive) (alternatives: Ambassador, Referral Rock, TrueLoyal)
- DeepSeek V4 Flash: neither named (first choices: Ambassador) (alternatives: CustomerGauge, PartnerStack, Referral Rock)
- Qwen 3.7 Flash: neither named (first choices: Influitive) (alternatives: Ambassador, CustomerGauge)
- Kimi K2: neither named (first choices: Referral Rock, Zinrelo) (alternatives: Kademi, PartnerStack)

## What the models said about GrowSurf

- "I'd recommend Referral Rock or GrowSurf as your top choices" (MiniMax M2.5, direct prompt, first choice)
- "Best Overall for Mid-Market B2B: GrowSurf" (Mistral Small, direct prompt, first choice)

## What the models said about Open Loyalty

- "Open Loyalty is the best-fit option among the results for mid-market and enterprise companies" (Perplexity Sonar, direct prompt, first choice)
- "API-first, composable toolkit for custom builds" (Perplexity Sonar, 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.