Klaviyo vs Mailchimp
Zero of fourteen models named Klaviyo first on the direct prompt; zero named Mailchimp. Klaviyo was named by fourteen of the fourteen models and Mailchimp by twelve and Klaviyo carries 49 labels and Mailchimp 21, so the shares are not directly comparable.
Boston, United States, founded 2012. Named in thirteen categories this edition.
Atlanta, United States, founded 2001. Named in fourteen 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
KlaviyoFirst choices, of fourteen modelsMailchimp
Across every category in the November 2026 Edition, Klaviyo and Mailchimp were named in the same answer 180 times, of the 441 answers naming Klaviyo and the 390 naming Mailchimp. In those answers Mailchimp took the first choice nine times and Klaviyo sixteen.
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 | | |
Klaviyo Mailchimp first choice named as an alternative argued againstblank: not namedEach cell is one answer, Klaviyo on the left and Mailchimp 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
Klaviyo12%#3 of 11Mailchimp4%#6 of 11Klaviyo0%#13 of 15Mailchimp0%#15 of 15What 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
What the models said about Mailchimp
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“Mailchimp and Klaviyo both provide generous free plans, with Klaviyo being more specialized for ecommerce businesses specifically.” Claude Haiku 4.5 · budget 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.