Group-Office vs Stacks
| Group-Office | Stacks | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | €12/mo | $5/mo |
| Open source | Yes | No |
| Platforms | Android, iOS, Linux, macOS, self-hosted, Web, Windows | — |
| Free plan | Yes | Yes |
| Paid from | — | 5 /user/mo |
| Automation rules | — | Yes |
| Time tracking | — | Yes |
Both are listed in Best Project Management Software. On Freedom251, Group-Office scores higher on our published basis.