| Price from | $13/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 5 | 1 |
| Spec score · Transactional Email Software | 9.2 (#2) | 7.9 (#26) |
| Spec score · Transactional email services | 8.8 (#8) | 8.1 (#25) |
| Free plan | Yes | Yes |
| Security | Mailchimp says its SOC 2 reports cover security, availability and processing integrity, and it maintains ISO 27001 certification and a VPAT. | Saved SMTP credentials are encrypted at rest, and tracking links and webhook events use signed tokens or signatures. |
| What it does | Mailchimp is an email and marketing-automation platform for growing businesses, combining email, social, landing pages, advertising and AI recommendations. | QQueue runs campaign, transactional, and manual email through one delivery pipeline using your SMTP server. |
