| Price from | $13/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 2 |
| Spec score · Email marketing tools | 9.4 (#2) | 7.6 (#127) |
| Spec score · Email Marketing Software | 9.0 (#5) | 7.6 (#136) |
| Analytics | Reporting includes campaign reports, send-time optimization, smart recommendations and engagement analytics. | Analytics track opens, clicks, bounces, and unsubscribes per send and campaign, with real-time delivery logs. |
| Automation | Marketing Automation Flows automate campaigns and can contain up to 200 flows on higher plans. | Automations can trigger on signup, birthdays, or custom events and use delays, conditions, and sequences. |
| Email automation | Yes | Yes |
| Free plan | Yes | Yes |
| Security | Mailchimp says its SOC 2 reports cover security, availability and processing integrity, and it maintains ISO 27001 certification and a VPAT. | The privacy policy lists encryption, secure servers, and access controls as security measures, while stating that absolute security cannot be guaranteed. |
| Audience segmentation | Yes | Yes |
| Support | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. | Resletter offers priority support for integration and setup questions and invites users to contact its support team. |
