# Email marketing platforms for enterprise buyers: what AI models recommend, September 2026

GTM AI Recommendation Index, September 2026 Edition. Asked as "email marketing platform" and as "email marketing tool", six framings each, to twelve models with search on, on behalf of an enterprise B2B company. Page: https://gtm-ai-index.com/marketing/email-marketing/enterprise/

**Standing:** Adobe Marketo Engage leads with 23% of first choices; verdict contested. 48 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Adobe Marketo Engage | 23% | 9% | 34 |
| 2 | HubSpot Marketing Hub | 21% | 19% | 59 |
| 3 | Salesforce Marketing Cloud | 19% | 15% | 48 |
| 4 | Brevo | 12% | 29% | 24 |
| 5 | ActiveCampaign | 4% | 11% | 37 |
| 6 | Braze | 2% | 8% | 24 |
| 7 | Adobe Campaign | 2% | 12% | 24 |
| 8 | Oracle Eloqua | 2% | 24% | 17 |
| 9 | Salesforce Marketing Cloud Account Engagement | 0% | 0% | 12 |
| 10 | Iterable | 0% | 10% | 20 |
| 11 | Klaviyo | 0% | 40% | 25 |
| 12 | Constant Contact | 0% | 83% | 12 |

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Adobe Marketo Engage; alternatives ActiveCampaign, HubSpot Marketing Hub, ZoomInfo Marketing
- GPT-5.4 mini: Adobe Marketo Engage; alternatives HubSpot Marketing Hub, Oracle Eloqua, Salesforce Marketing Cloud, Salesforce Marketing Cloud Account Engagement
- Gemini 3.5 Flash: Adobe Marketo Engage; alternatives ActiveCampaign, HubSpot Marketing Hub, Oracle Eloqua, Salesforce Marketing Cloud Account Engagement
- Perplexity Sonar: HubSpot Marketing Hub; alternatives Adobe Marketo Engage, Salesforce Marketing Cloud
- Grok 4.1 Fast: HubSpot Marketing Hub; alternatives Adobe Marketo Engage, Salesforce Marketing Cloud Account Engagement
- Mistral Small: HubSpot Marketing Hub; alternatives ActiveCampaign, Adobe Campaign, Oracle Eloqua, Salesforce Marketing Cloud
- DeepSeek V4 Flash: Adobe Marketo Engage; alternatives HubSpot Marketing Hub, Salesforce Marketing Cloud Account Engagement
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Adobe Marketo Engage, Salesforce Marketing Cloud; alternatives ActiveCampaign, HubSpot Marketing Hub, Oracle Eloqua
- Kimi K2: Adobe Marketo Engage; alternatives HubSpot Marketing Hub, Salesforce Marketing Cloud Account Engagement
- GLM 4.7 FlashX: no first choice; alternatives Adobe Marketo Engage, Braze, HubSpot Marketing Hub, Microsoft Dynamics 365 Marketing
- MiniMax M2.5: HubSpot Email Marketing, Salesforce Marketing Cloud; alternatives SAP Emarsys, Salesforce Marketing Cloud Account Engagement

## Sources the answers cite

22 of 72 answers came back with a source list, from 4 of 12 models. Sites named in the most answers:

- ventureharbour.com: 8 answers, 12 citations
- mailtrap.io: 8 answers, 11 citations
- insiderone.com: 7 answers, 9 citations
- sequenzy.com: 6 answers, 9 citations
- brevo.com: 6 answers, 6 citations
- klaviyo.com: 5 answers, 5 citations
- pipeline.zoominfo.com: 5 answers, 5 citations
- attentive.com: 4 answers, 4 citations

Pages named in the most answers:

- https://brevo.com/blog/best-email-marketing-services (6 answers)
- https://ventureharbour.com/email-marketing-software-tools-one-best (6 answers)
- https://ventureharbour.com/top-enterprise-email-marketing-automation-crm (6 answers)
- https://insiderone.com/enterprise-email-marketing (5 answers)
- https://klaviyo.com/blog/best-email-marketing-platforms (5 answers)
- https://pipeline.zoominfo.com/marketing/email-marketing-platforms (5 answers)
- https://attentive.com/blog/best-email-marketing-platforms (4 answers)
- https://mailmodo.com/guides/enterprise-email-marketing-platform (4 answers)
- https://mailtrap.io/blog/email-marketing-platforms (4 answers)
- https://pcmag.com/picks/the-best-email-marketing-software (4 answers)

## Warned against

- Mailchimp: 14 of 16 labels negative. "Mid-Market Platforms (Avoid for True Enterprise Scale)... Mailchimp, ActiveCampaign, and Omnisend are excellent for startups ... frequently fail enterprise requirements" (Qwen 3.7 Flash, negative prompt)
- Constant Contact: 10 of 12 labels negative. "Constant Contact: Small-business oriented... Best for infrequent low-volume sends, not enterprise." (Grok 4.1 Fast, negative prompt)
- Klaviyo: 10 of 25 labels negative. "Best for: D2C e-commerce brands on Shopify/WooCommerce; avoid for B2B enterprises" (Kimi K2, negative prompt)
- HubSpot Marketing Hub: 11 of 59 labels negative. "HubSpot Marketing Hub Professional/Enterprise (not recommended for pure email focus; expensive, feature-gated, and contact-based billing)" (GLM 4.7 FlashX, negative prompt)

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, September 2026 Edition, gtm-ai-index.com.