# Referral and partner programs: what AI models recommend, September 2026

Gane Index, September 2026 Edition. Asked as "referral program software" and as "partner ecosystem and referral tracking tool", six framings each, to six frontier models with search on, on behalf of a mid-market B2B software company. Page: https://www.gane.ai/index/gtm/partner/referral-and-partner-programs/2026-09-expanded

This is the permanent record of the September 2026 Edition, published September 9, 2026 and superseded since. The current standing: https://www.gane.ai/index/gtm/partner/referral-and-partner-programs/index.md

**Standing:** PartnerStack leads with 30% of first choices; verdict contested. 23 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [PartnerStack](https://www.gane.ai/index/gtm/vendors/partnerstack/index.md) | 30% | 14% | 14 |
| 2 | [Referral Rock](https://www.gane.ai/index/gtm/vendors/referral-rock/index.md) | 22% | 13% | 15 |
| 6 | [ReferralCandy](https://www.gane.ai/index/gtm/vendors/referralcandy/index.md) | 9% | 44% | 16 |
| 7 | [Referral Factory](https://www.gane.ai/index/gtm/vendors/referral-factory/index.md) | 4% | 17% | 12 |
| 11 | [Viral Loops](https://www.gane.ai/index/gtm/vendors/viral-loops/index.md) | 0% | 10% | 10 |

Rank is by share of first choices among all 63 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 Opus 5: Referral Factory, Referral Rock; alternatives Cello
- Claude Opus 4.8: Cello, Referral Rock; alternatives Introw, Partnero, Referral Factory
- GPT-6 Astra: Referral Rock; alternatives Cello, PartnerStack, impact.com Advocate
- GPT-5.6 Sol: Referral Rock; alternatives Cello, PartnerStack
- Gemini 3.1 Pro: PartnerStack; alternatives FirstPromoter, Referral Rock, Rewardful, SaaSquatch
- Perplexity Sonar Pro: Referral Rock; alternatives PartnerStack, Referral Factory

## Sources the answers cite

33 of 36 answers came back with a source list, from 6 of 6 models. Sites named in the most answers:

- referralcandy.com: 13 answers, 21 citations
- viral-loops.com: 13 answers, 18 citations
- referral-factory.com: 13 answers, 16 citations
- tremendous.com: 13 answers, 13 citations
- referralrock.com: 12 answers, 17 citations
- capterra.com: 10 answers, 21 citations
- g2.com: 9 answers, 18 citations
- extole.com: 9 answers, 14 citations

Pages named in the most answers:

- https://tremendous.com/blog/referral-marketing-tools (13 answers)
- https://extole.com/blog/retail-referral-software (7 answers)
- https://moosend.com/blog/referral-marketing-software (7 answers)
- https://referralcandy.com/pricing (7 answers)
- https://thecmo.com/tools/referral-marketing-software (7 answers)
- https://affise.com/blog/referral-software (6 answers)
- https://linkjolt.io/blog/best-referral-marketing-software (6 answers)
- https://klaviyo.com/blog/best-referral-marketing-software (5 answers)
- https://viral-loops.com/pricing (5 answers)
- https://capterra.com/p/139089/Referral-Rock-Software (4 answers)

## Warned against

- ReferralCandy: 7 of 16 labels negative. "Tools built specifically for retail (like ReferralCandy or Friendbuy) will generally fall short for your needs." (Gemini 3.1 Pro, direct prompt)
- Friendbuy: 3 of 9 labels negative. "Tools built specifically for retail (like ReferralCandy or Friendbuy) will generally fall short for your needs." (Gemini 3.1 Pro, direct prompt)
- PartnerStack: 2 of 14 labels negative. "Avoid enterprise advocate platforms like Influitive or heavy partner-management tools like PartnerStack" (Gemini 3.1 Pro, negative prompt)
- Ambassador: 2 of 2 labels negative. "Ambassador ... underwent a sudden and messy ownership change/shutdown ... history warrants caution" (Gemini 3.1 Pro, negative prompt)

## Record

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