| Price from | $13/mo | €48/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 4 |
| Spec score · Email marketing tools | 9.4 (#2) | 8.2 (#73) |
| Spec score · Email Marketing Software | 9.0 (#10) | 8.1 (#86) |
| A/B testing | Yes | Yes |
| API | Mailchimp exposes open Marketing and Transactional APIs authenticated with OAuth or API keys. | MailUp includes API and integrations among its platform feature areas. |
| Automation | Marketing Automation Flows automate campaigns and can contain up to 200 flows on higher plans. | The platform supports automated email and SMS workflows, with 3 automations in Starter and up to 100 in Plus and Premium. |
| Email automation | Yes | Yes |
| Founded | 2001 | 2002 |
| Free plan | Yes | No |
| Headquarters | Atlanta, USA | Pesaro, Italy |
| Integrations | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. | MailUp lists integrations and compatibility areas including CRM, CMS, e-commerce, ERP, external databases, and business intelligence systems. |
| Landing pages | Yes | Yes |
| Security | Mailchimp says its SOC 2 reports cover security, availability and processing integrity, and it maintains ISO 27001 certification and a VPAT. | MailUp says its infrastructure includes a European data center, data loss prevention, threat protection systems, and periodic vulnerability tests. |
| Audience segmentation | Yes | Users can filter contacts by data, location, activity, or device and personalize campaigns with dynamic content. |
| Support | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. | Starter includes email support with requests processed within 4 business hours; Plus adds phone support and Premium includes priority support. |
