| 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 | 9 |
| Spec score · Transactional SMS Software | 9.0 (#5) | 8.5 (#15) |
| Founded | 2001 | 2013 |
| Free plan | Yes | No |
| Headquarters | Atlanta, USA | Tallinn, Estonia |
| Integrations | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. | The integrations page describes API documentation, Zapier connections, and native integrations including Salesforce, Optimove, user.com, and SalesManago. |
| Security | Mailchimp says its SOC 2 reports cover security, availability and processing integrity, and it maintains ISO 27001 certification and a VPAT. | Messente lists GDPR, DORA, and ISO 27001:2022 compliance, with data hosted in Germany and Finland. |
| Support | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. | The pricing page describes basic support and onboarding for Pay-As-You-Go and dedicated support with an Account Manager for the Commitment plan. |
