| Price from | — | — |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Software Synthesizers | 8.0 (#12) | 7.5 (#21) |
| Activation | Copy protection uses a serial number and online activation. | Spire can be activated with a license key available for purchase in the maker’s shop. |
| Company | The legal notice identifies René Sander in Werdohl, Germany, as the responsible service provider. | The maker’s site identifies the company as REVEAL SOUND PTY LTD. |
| Demo | A free demo is available for Windows and macOS; it cannot save presets and must be restarted after 20 minutes of use. | The maker describes the demo as fully functional, with noise every 30 seconds. |
| Product | RAPID is a modern polyphonic hybrid synthesizer with a layer engine for shaping sounds. | Spire is a software synthesizer. |