Overflow vs Principle
| Overflow | Principle | |
|---|---|---|
| Free plan | No | No |
| Free trial | Yes | No |
| Paid from | €19.95/mo | $99/mo |
| Open source | No | No |
| Platforms | macOS, Web, Windows | Web, macOS, iOS |
| Free plan | No | No |
| Design systems | — | Yes |
Both are listed in Best Web Design Software. On Specifiction, Overflow scores higher on our published basis.