# Customer.io vs Omnisend: which do AI models recommend for mobile & push, October 2026

GTM AI Recommendation Index, October 2026 Edition, Mobile marketing and push. Six of fourteen models named Customer.io first on the direct prompt; zero named Omnisend. Page: https://gtm-ai-index.com/marketing/mobile-marketing-and-push/customer-io-vs-omnisend/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Customer.io | 19% | #2 of 14 | 0% | 23 | 11 of 14 |
| Omnisend | 4% | #5 of 14 | 8% | 12 | 8 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: customer.io first (first choices: Customer.io) (alternatives: ActiveCampaign, Courier, OneSignal, Pushwoosh, Vero)
- Gemini 3.5 Flash: customer.io first (first choices: Customer.io, Sakari) (alternatives: ActiveCampaign, OneSignal)
- Grok 4.20: customer.io first (first choices: Customer.io) (alternatives: Braze, OneSignal, Pushwoosh, Vero)
- Qwen 3.7 Flash: customer.io first (first choices: Customer.io) (alternatives: Braze, HubSpot Marketing Hub)
- GLM 4.7 FlashX: customer.io first (first choices: Customer.io) (alternatives: OneSignal)
- Muse Glimmer 30B: customer.io first (first choices: Customer.io) (alternatives: Braze, Iterable)
- DeepSeek V4 Flash: neither first, one named (first choices: OneSignal) (alternatives: Customer.io, Twilio Programmable Messaging)
- Kimi K2: neither first, one named (first choices: OneSignal) (alternatives: ActiveCampaign, Customer.io, Iterable)
- GPT-5.4 mini: neither named (first choices: Braze) (alternatives: Airship, Iterable, OneSignal)
- Perplexity Sonar: neither named (first choices: OneSignal) (alternatives: Attentive, CleverTap, Insider, MoEngage)
- Mistral Small: neither named (first choices: OneSignal, Pushwoosh) (alternatives: Insider)
- Llama 4 Maverick: neither named (first choices: Pushwoosh) (alternatives: Attentive, Klaviyo)
- MiniMax M2.5: neither named (first choices: OneSignal) (alternatives: Braze, MoEngage, Salesforce Marketing Cloud, Twilio Programmable Messaging)
- GPT-6 Luna: neither named (first choices: Customer.io Journeys) (alternatives: Braze, OneSignal)

## What the models said about Customer.io

- "the industry consensus for a mid-market B2B company looking for a balance of features, ease of use, and cost-effectiveness is Customer.io" (GLM 4.7 FlashX, direct prompt, first choice)
- "the industry consensus for the best overall balance of power and usability for mid-market B2B (especially SaaS) is Customer.io" (Qwen 3.7 Flash, direct prompt, first choice)

## What the models said about Omnisend

- "Avoid e-comm focused ones like Omnisend/Klaviyo (better for B2C retail)." (Grok 4.20, paraphrase prompt, hard negative)

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