OpusWriter vs Substack
| OpusWriter | Substack | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | No |
| Paid from | $129/mo | — |
| Open source | No | No |
| Platforms | Linux, macOS, Windows | Web, iOS, Android |
| Free plan | No | Yes |
| Real-time collaboration | Yes | — |
Both are listed in Best Writing Apps. On Samsung Mobile US Press, Substack scores higher on our published basis.