Async vs Narration Box
| Async | Narration Box | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | $15/mo |
| Open source | No | No |
| Platforms | api, iOS, Web | api, Web |
| Free plan | Yes | Yes |
| Paid from | 11.99 /mo | 15 /mo |
| Commercial use | — | Yes |
| Voice cloning | — | Yes |
| API access | — | Yes |
| Languages | — | 80 languages |
| Export formats | — | MP3, WAV, Opus, FLAC, OGG |
| Platforms | — | web, api |
Both are listed in Best Text-to-Speech Software. On Samsung Mobile US Press, Async scores higher on our published basis.