Customer.io vs Substack
| Customer.io | Substack | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | $100/mo | — |
| Open source | No | No |
| Platforms | Web, iOS, Android | Web, iOS, Android |
| Free plan | No | Yes |
| Paid from | 100 /mo | — |
| Email automation | Yes | Yes |
| Audience segmentation | — | Yes |
Both are listed in Best Email Marketing Software. On Samsung Mobile US Press, Substack scores higher on our published basis.