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Mobile marketing and push · September 2026 Edition

Customer.io vs Omnisend

Six of twelve models named Customer.io first on the direct prompt; zero named Omnisend. Customer.io was named by twelve of the twelve models and Omnisend by nine and Customer.io carries 27 labels and Omnisend 17, so the shares are not directly comparable.

Customer.io

endorsed leader

Named in seven categories this edition.

Omnisend

accepted challenger

Lithuania, founded 2014. Named in six categories this edition.

First-choice share34%4%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate7%6%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#2#3A position in a field of 17; printed, not drawn.
Labels2717A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Customer.io reading right to left. Rank and label count are printed, not drawn.OneSignal was named alongside these two in seven of the twelve direct answers. OneSignal vs Customer.io · OneSignal vs Omnisend

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; every quote names the model and the prompt it came from. Both figures come from the mobile marketing and push page.

By framing

How many of the twelve models made each the first choice, per way of asking, and how many argued against it.
Customer.ioFirst choices, of twelve modelsOmnisend
Direct60
Paraphrase801 against Omnisend
Comparative01
Budget-constrained02
Scale-constrained20
Negative002 against Customer.io
Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.

The direct prompt

The plain question, one answer per model, grouped by where Customer.io and Omnisend stood in it.

Customer.io first, Omnisend not the choice

6 of 12 modelsOmnisend was named in the answer but not as the choice, or not at all.
Gemini 3.5 FlashCustomer.io alternatives: Courier, Knock, OneSignal
Perplexity SonarCustomer.io alternatives: ActiveCampaign, Courier
Mistral SmallCustomer.io alternatives: ActiveCampaign, OneSignal
DeepSeek V4 FlashCustomer.io alternatives: CleverTap, OneSignal, Vero
Qwen 3.7 FlashCustomer.io, Vero
Kimi K2Customer.io alternatives: OneSignal, Vero

Neither was the first choice, one was named

5 of 12 modelsThe answer put something else first and named one of the two as an alternative.
Claude Haiku 4.5Vero alternatives: Customer.io, Knock
GPT-5.4 miniBraze alternatives: Customer.io
Grok 4.1 FastOneSignal alternatives: ActiveCampaign, CleverTap, Customer.io, Pushwoosh
GLM 4.7 FlashXOneSignal alternatives: Customer.io, Pushwoosh, SendPulse
MiniMax M2.5OneSignal alternatives: ActiveCampaign, Customer.io

Neither was named

1 of 12 modelsThe answer made no first choice from these two in this category.
Llama 4 Maverickno first choice

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Omnisend leads by four points.
Omnisend6%#3 of 19
Customer.io2%#9 of 19
The full small business standing →
Mid-marketThe figures above
The order flips: Customer.io leads at mid-market.
Customer.io34%#2 of 17
Omnisend4%#3 of 17
The full mid-market standing →
Enterprise
Customer.io leads by two points.
Customer.io2%#7 of 12
Omnisend0%#– of 12
The full enterprise standing →

What the models said about Customer.io

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of five in this category shown.

“flags less public failure visibility and incompletely documented retry/fallback behavior” Perplexity Sonar · negative prompt · soft negative
“Customer.io — Trustpilot Problems ... Trustpilot rating: 2.8/5” GLM 4.7 FlashX · negative prompt · soft negative
“Customer.io is the best match for a mid-market B2B company that needs both mobile push notifications and SMS marketing in one platform” Perplexity Sonar · direct prompt · first choice
“OneSignal Professional, CleverTap, Customer.io, or MoEngage deliver enterprise-grade capabilities at a fraction of the cost” DeepSeek V4 Flash · scale prompt · first choice
“Customer.io: Best for product-led growth (PLG) and B2B/SaaS companies... transparent pricing model.” Gemini 3.5 Flash · scale prompt · first choice

What the models said about Omnisend

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of three in this category shown.

“What I'd skip ... Heavily e-commerce/DTC-centric (Shopify)” DeepSeek V4 Flash · paraphrase prompt · hard negative
“Online store (ecommerce) wanting email + SMS + web push all-in-one | Omnisend | Combines all three channels in one affordable tool” DeepSeek V4 Flash · budget prompt · first choice
“For companies with very limited budgets, Omnisend's free plan or SendPulse's free tier are excellent starting points” Claude Haiku 4.5 · budget prompt · first choice
Also compared
OneSignal vs Customer.ioOneSignal vs OmnisendThe full mobile & push standing

Comparisons are drawn for the top three products in each category. The output is the models' output; nothing here is a recommendation by the index.