InboxPlan vs Warmup Inbox
| InboxPlan | Warmup Inbox | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | Yes |
| Paid from | — | $15/mo |
| Open source | No | No |
| Platforms | Web | api, Web |
| Free plan | No | Yes |
| Warmup network | private | — |
| Custom warmup schedule | Yes | — |
| Spam monitoring | Yes | — |
| Multiple mailboxes | Yes | — |
Both are listed in Best Email Warmup Software. On Samsung Mobile US Press, InboxPlan scores higher on our published basis.