Amazon Polly vs Inworld AI
| Amazon Polly | Inworld AI | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | $4/mo | $25/mo |
| Open source | No | No |
| Platforms | api, Web | api, self-hosted, Web |
| Voice cloning | Yes | Yes |
| API access | Yes | Yes |
| Language count | 42 languages | 200 languages |
| Audio export formats | mp3, ogg_vorbis, ogg_opus, pcm, mu-law, a-law | MP3, WAV, PCM, LINEAR16, OGG_OPUS, μ-law, A-law, FLAC |
| Free plan | — | Yes |
| Paid from | — | 25 /mo |
| Commercial use | — | Yes |
| SSML or speech controls | — | Yes |
| Game engine tools | — | Unreal AI Runtime SDK; Unity AI Runtime SDK early access |
Both are listed in Best Game Voice Generators. On Samsung Mobile US Press, Inworld AI scores higher on our published basis.