Principle vs ProtoPie
Principle
principle.app
ProtoPie
protopie.ioSide by side
| Figure | Principle | ProtoPie |
|---|---|---|
| Price from | $99/mo | $25/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | Yes | Yes |
| iOS | Yes | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 4 |
| Spec score · Prototyping tools | 7.9 (#17) | 9.2 (#5) |
| Spec score · Web Design Software | 7.9 (#26) | 8.7 (#8) |
| Spec score · UI design tools | 7.8 (#26) | 8.6 (#10) |
| Spec score · Prototyping Software | 7.9 (#22) | 8.7 (#9) |
| Spec score · UI/UX Design Tools | 7.9 (#20) | 8.6 (#10) |
| Spec score · Ui Ux Designing Software | 7.9 (#17) | 8.6 (#7) |
| Spec score · Game UI Design Software | 7.8 (#26) | 8.6 (#11) |
| Free plan | No | Yes |
| Purpose | Principle is a tool for designing animated and interactive user interfaces for web, mobile, and desktop. | ProtoPie is a high-fidelity prototyping platform for creating and testing interactive digital experiences. |
Plans
Principle
- Principle license$129 a month
- License renewal$99 a month
- License renewal$99, paid once
- Principle license$129, paid once
In their own words
ProtoPie
ProtoPie is a high-fidelity platform for creating and testing interactive digital prototypes. Studio for macOS and Windows supports logic, variables, formulas, multi-touch gestures, text input, media playback, voice, camera access, and device sensors such as gyroscopes and compasses. Plugins import designs from Figma, Sketch, and Adobe XD. Prototypes can connect phones, tablets, TVs, and wearables, with interactions synchronized across devices. The product ecosystem includes Studio, Player for mobile devices, Cloud for sharing, and Connect for connected experiences. Player is available for iOS, iPadOS, Android, and HarmonyOS. The Free plan includes two prototypes saved in Cloud, up to eight scenes per prototype, and 50MB of Cloud storage. ProtoPie lists Basic at $25 a month billed yearly, and Pro at $47 a month billed yearly. Free-plan limitations include no local file saving, share links, Handoff, or Team Libraries. Prototypes export only as.pie files, not PDF, JPEG, or HTML code.