Kallipos vs Saylor Academy
| Kallipos | Saylor Academy | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web | Android, iOS, Web |
| Free plan | Yes | Yes |
| Authoring tools | Yes | — |
| Publishing workflow | Yes | — |
| Download formats | PDF, EPUB | — |
| Content review | Yes | — |
Both are listed in Best Open Educational Resource Platforms. On Samsung Mobile US Press, Saylor Academy scores higher on our published basis.