# Ecommerce marketing: what AI models recommend, September 2026

Gane Index, September 2026 Edition. Asked as "ecommerce marketing platform" and as "marketing tool for an online store", 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/marketing/ecommerce-marketing/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This is the permanent record of the September 2026 Edition, published September 9, 2026 and superseded since.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/marketing/ecommerce-marketing/index.md

**Standing:** HubSpot Marketing Hub leads with 60% of first choices; verdict consensus. 20 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [HubSpot Marketing Hub](https://www.gane.ai/index/gtm/vendors/hubspot-marketing-hub/index.md) | 60% | 22% | 18 |
| 2 | [Omnisend](https://www.gane.ai/index/gtm/vendors/omnisend/index.md) | 25% | 0% | 16 |
| 3 | [Klaviyo](https://www.gane.ai/index/gtm/vendors/klaviyo/index.md) | 5% | 27% | 26 |
| 7 | [Braze](https://www.gane.ai/index/gtm/vendors/braze/index.md) | 0% | 0% | 11 |
| 74 | [Mailchimp](https://www.gane.ai/index/gtm/vendors/mailchimp/index.md) | 0% | 62% | 13 |

Rank is by share of first choices among all 74 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: HubSpot Marketing Hub; alternatives 6sense, Amplitude, Customer.io, Demandbase
- Claude Opus 4.8: HubSpot Marketing Hub; alternatives 6sense, Adobe Marketo Engage, Demandbase, Salesforce Marketing Cloud Account Engagement
- GPT-6 Astra: HubSpot Marketing Hub; alternatives Adobe Marketo Engage, Customer.io, Klaviyo
- GPT-5.6 Sol: HubSpot Marketing Hub; alternatives Adobe Marketo Engage, Customer.io, Salesforce Marketing Cloud Account Engagement
- Gemini 3.1 Pro: HubSpot Marketing Hub; alternatives Adobe Marketo Engage, Customer.io, Salesforce Marketing Cloud Account Engagement
- Perplexity Sonar Pro: HubSpot Marketing Hub; alternatives Adobe Commerce, BigCommerce B2B Edition, OroCommerce, Shopify

## Sources the answers cite

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

- klaviyo.com: 8 answers, 8 citations
- omnisend.com: 7 answers, 20 citations
- emailtooltester.com: 7 answers, 18 citations
- emailvendorselection.com: 7 answers, 16 citations
- hubspot.com: 7 answers, 10 citations
- theretailexec.com: 5 answers, 8 citations
- shopify.com: 5 answers, 7 citations
- mailchimp.com: 5 answers, 6 citations

Pages named in the most answers:

- https://emailvendorselection.com/best-email-marketing-platforms (5 answers)
- https://omnisend.com/blog/omnisend-vs-klaviyo (5 answers)
- https://bigcommerce.com/articles/ecommerce/ecommerce-platforms (4 answers)
- https://emailtooltester.com/en/blog/best-email-marketing-for-ecommerce (4 answers)
- https://emailvendorselection.com/ecommerce-email-marketing-software (4 answers)
- https://sender.net/blog/email-marketing-platforms-for-ecommerce (4 answers)
- https://braze.com/solutions/retail-and-ecommerce (3 answers)
- https://drip.com/blog/best-email-marketing-software (3 answers)
- https://ecombiz.ai/articles/marketing-automation-tools-comparison-klaviyo-vs-omnisend-vs-mailchimp (3 answers)
- https://emailtooltester.com/en/blog/omnisend-vs-klaviyo (3 answers)

## Warned against

- Mailchimp: 8 of 13 labels negative. "Mailchimp is the standard cautionary tale here — price hikes and restrictive contact and email limits have pushed customers to alternatives" (Claude Opus 5, negative prompt)
- Attentive: 4 of 8 labels negative. "Some discounted agreements include minimum spending commitments. If usage falls short, you’re invoiced for the remaining commitment." (GPT-6 Astra, negative prompt)
- HubSpot Marketing Hub: 4 of 18 labels negative. "Exceeding your marketing-contact limit triggers an automatic tier upgrade... prohibits mid-contract cancellation or downgrades." (GPT-6 Astra, negative prompt)
- Klaviyo: 7 of 26 labels negative. "As of February 2025, Klaviyo bills on total active profiles, meaning every contactable profile counts whether you email them or not." (Claude Opus 5, 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.