| Price from | $13/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 1 |
| Spec score · Email marketing tools | 9.4 (#2) | 8.4 (#52) |
| Spec score · Email Marketing Software | 9.0 (#10) | 7.7 (#133) |
| A/B testing | Yes | Yes |
| API | Mailchimp exposes open Marketing and Transactional APIs authenticated with OAuth or API keys. | Vision6 provides REST and JSON-RPC APIs for connecting it with other systems, and its documentation recommends REST where possible because JSON-RPC is expected to be deprecated. |
| Company history | Mailchimp was founded in Atlanta in 2001 by Ben Chestnut and Dan Kurzius. | Constant Contact’s acquisition announcement says Vision6 had served thousands of businesses since 2001. |
| Email automation | Yes | Yes |
| Free plan | Yes | No |
| Headquarters | Atlanta, USA | Brisbane, Australia |
| Integrations | Mailchimp advertises more than 300 integrations, including Shopify, WooCommerce, Canva, Zapier, Salesforce, WordPress, Stripe and QuickBooks Online. | Direct integrations include Eventbrite, Salesforce, Shopify, Google Analytics, Google reCAPTCHA, and WordPress, with additional app connections available through Zapier and PieSync. |
| Native integrations | 300 | 5 |
| Security | Mailchimp says its SOC 2 reports cover security, availability and processing integrity, and it maintains ISO 27001 certification and a VPAT. | The maker states that data in transit is encrypted with TLS 1.2 or higher and data at rest uses dm-crypt with LUKS. |
| Audience segmentation | Yes | Yes |
| SMS | SMS marketing is available as an add-on for paid plans in selected markets after application and approval. | SMS can be used for marketing, surveys, opt-in competitions, and collecting event responses. |
