Kai vs Mailtwine
| Kai | Mailtwine | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | No |
| Paid from | $20/mo | — |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Web | Android, iOS, Linux, macOS, Web, Windows |
| Free plan | No | No |
| Paid from | 50 /user/mo | — |
| Inbox triage | Yes | Yes |
| AI reply drafting | Yes | Yes |
| Automatic sending | No | Yes |
| Follow-up actions | Yes | Yes |
| Email platforms | gmail | — |
| Thread summaries | — | Yes |
Both are listed in Best AI Email Assistants. On Everything Xiaomi, Mailtwine scores higher on our published basis.