| Price from | €8/mo | $13/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 6 | 5 |
| Spec score · Email Marketing Software | 8.0 (#96) | 9.0 (#10) |
| Spec score · Email marketing tools | 7.7 (#119) | 9.4 (#2) |
| A/B testing | No | Yes |
| API | Keila provides an API to manage contacts and campaigns and to automate email marketing workflows. | Mailchimp exposes open Marketing and Transactional APIs authenticated with OAuth or API keys. |
| Email automation | No | Yes |
| Free plan | No | Yes |
| Monthly send limit | 2000 | 5000 |
| Segmentation | Contacts can be segmented using custom data and campaign interactions, with a visual editor and a query language. | Yes |
| Support | Keila offers help with templates, website form embedding, and spam complaints, and lists paid support for self-hosting by contacting [email protected]. | Official feature pages state 24/7 service and support, with onboarding specialists and customer-success services for paid customers. |
