AI assistants most often recommend Mailchimp for cold email software in 🇯🇵 Japan (日本語), naming it in 100% of the buyer questions we tested, followed by HubSpot and Sendinblue. We asked an AI model the questions buyers ask about cold email software and tallied which brands it named most — "share of voice" in AI answers, who AI recommends when no human is watching.
| # | Brand | AI share of voice |
|---|---|---|
| 1 | Mailchimp | 6/6 (100%) |
| 2 | HubSpot | 6/6 (100%) |
| 3 | Sendinblue | 5/6 (83%) |
| 4 | Mailgun | 2/6 (33%) |
| 5 | GitHub Copilot | 1/6 (17%) |
| 6 | Lemlist | 1/6 (17%) |
| 7 | Constant Contact | 1/6 (17%) |
Method: 6 representative buyer questions via a large language model, 🇯🇵 Japan (日本語). Updated 6/25/2026. A proxy for how AI assistants describe this category.
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