| Price from | $13/mo | $29/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 3 |
| Spec score · Email marketing tools | 9.4 (#2) | 8.2 (#72) |
| Spec score · Email Marketing Software | 9.0 (#10) | 8.1 (#87) |
| A/B testing | Yes | Yes |
| API | Mailchimp exposes open Marketing and Transactional APIs authenticated with OAuth or API keys. | MoonMail documents a REST API, webhooks, and SDKs for Node.js/JavaScript, Python, PHP, Ruby, and Go; it lists standard-plan limits of 1,000 requests per hour and enterprise limits of 10,000 per hour. |
| Email automation | Yes | Yes |
| Free plan | Yes | The help page says the free plan includes 2,000 emails per month and basic features, with no credit card required to start. |
| Monthly send limit | 5000 | 10000 |
| Audience segmentation | Yes | Yes |
| Subscriber limit | 500 | 5000 |
| Support | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. | The support page lists 24/7 live chat, email support with a stated response within four hours, and phone support Monday to Friday, 9am–6pm EST. |
