| Price from | 300 BRL/mo | $13/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Plans published | 4 | 5 |
| Spec score · Email Marketing Software | 7.7 (#128) | 9.0 (#10) |
| Spec score · Email marketing tools | 7.2 (#164) | 9.4 (#2) |
| Company history | InInbox is part of the Zievo group; Zievo Tecnologia Ltda. was established in 2011 and the group says it has operated in hosting and email marketing since 2005. | Mailchimp was founded in Atlanta in 2001 by Ben Chestnut and Dan Kurzius. |
| Founded | 2011 | 2001 |
| Free plan | No | Yes |
| Headquarters | The site lists an address in Eldorado, Contagem, Minas Gerais, Brazil. | Atlanta, USA |
| Monthly send limit | 1000000 | 5000 |
| Support | Customer service operates Monday through Friday, 9 a.m. to 6 p.m., with an average ticket response time of two hours during business hours. | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. |
