| Price from | $13/mo | $99/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 5 |
| Spec score · Email marketing tools | 9.4 (#2) | 8.3 (#66) |
| Spec score · Email Marketing Software | 9.0 (#10) | 8.0 (#101) |
| A/B testing | Yes | Yes |
| Automation | Marketing Automation Flows automate campaigns and can contain up to 200 flows on higher plans. | The visual journey builder has sixteen trigger types, fifteen actions, branching, timed waits, and webhooks to users’ systems. |
| Company history | Mailchimp was founded in Atlanta in 2001 by Ben Chestnut and Dan Kurzius. | The about page says co-founder Justin Francisco co-founded Upsender in early 2022. |
| Email automation | Yes | Yes |
| Founded | 2001 | 2022 |
| Free plan | Yes | Yes |
| Integrations | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. | The site describes webhooks to users’ own systems but does not name third-party integrations on the opened page. |
| Monthly send limit | 5000 | 1000000 |
| Audience segmentation | Yes | Saved segments can use subscriber behavior, custom fields, and tags. |
| Support | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. | The company says customers can contact a real person who knows their account and responds quickly. |
| What it does | Mailchimp is an email and marketing-automation platform for growing businesses, combining email, social, landing pages, advertising and AI recommendations. | Upsender is an email sending platform for campaigns, automated journeys, segmentation, and transactional email. |
