Paperpile vs Petal
| Paperpile | Petal | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | Yes | No |
| Paid from | $4.15/mo | $2.55/mo |
| Open source | No | No |
| Platforms | Android, extension, iOS, macOS, Web, Windows | extension, Web |
| Free plan | No | Yes |
| Paid from | 4.15 /user/mo | 4.99 /user/mo |
| PDF annotation | Yes | Yes |
Both are listed in Best Reference Management Software, Best Citation Management Software. On Samsung Mobile US Press, Paperpile scores higher on our published basis.