Omnisend vs Klaviyo
Zero of fourteen models named Omnisend first on the direct prompt; zero named Klaviyo. Both were named by all fourteen models and Omnisend carries 33 labels and Klaviyo 49, so the shares are not directly comparable.
Lithuania, founded 2014. Named in eight categories this edition.
Boston, United States, founded 2012. Named in thirteen categories this edition.
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; every quote names the model and the prompt it came from. Both figures come from the ecommerce marketing page.
By framing
OmnisendFirst choices, of fourteen modelsKlaviyo
Across every category in the November 2026 Edition, Omnisend and Klaviyo were named in the same answer 145 times, of the 220 answers naming Omnisend and the 441 naming Klaviyo. In those answers Klaviyo took the first choice sixteen times and Omnisend thirteen.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | |||||
| GPT-5.4 mini | | | | | ||
| Gemini 3.5 Flash | | | | | ||
| Perplexity Sonar | | | | | ||
| Grok 4.20 | | | | | | |
| Mistral Small | | | | |||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | | ||||
| Qwen 3.7 Flash | | | ||||
| Kimi K2 | | | ||||
| GLM 4.7 FlashX | | | | | ||
| MiniMax M2.5 | ||||||
| GPT-6 Luna | | | | | ||
| Muse Glimmer 30B | | |
Omnisend Klaviyo first choice named as an alternative argued againstblank: not namedEach cell is one answer, Omnisend on the left and Klaviyo on the right.The direct prompt
Neither was the first choice, one was named
4 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
10 of 14 modelsThe answer made no first choice from these two in this category.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
Omnisend11%#3 of 10Klaviyo7%#4 of 10Omnisend0%#– of 15Klaviyo0%#13 of 15What the models said about Omnisend
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.
“The best balance of ecommerce functionality, usability, and price. Often rated highest overall for small-to-mid ecommerce stores.” DeepSeek V4 Flash · comparative prompt · first choice
“Choose Klaviyo (for maximum data depth/predictive scaling) or Omnisend (for lower cost and ease of use).” Gemini 3.5 Flash · comparative prompt · first choice
What the models said about Klaviyo
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“Industry Standard for DTC. Deep integration with Shopify/Magento... Upgrade to Klaviyo once you have significant revenue.” Qwen 3.7 Flash · comparative prompt · first choice
“1. Klaviyo - Focus: Email and SMS marketing automation, especially strong for Shopify and Magento stores.” Mistral Small · comparative prompt · first choice
“Choose Klaviyo (for maximum data depth/predictive scaling) or Omnisend (for lower cost and ease of use).” Gemini 3.5 Flash · comparative prompt · first choice
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.