Voiser offers Free Trial, but AiSofiya does not.
The starting price of Voiser begins at $12/month, while pricing details for AiSofiya are unavailable.
AiSofiya offers several advantages, including Supports over 840 languages, Realistic voice-overs, Natural text generator, Supports SSML, Web and mobile access and many more functionalities.
The cons of AiSofiya may include a No Offline Access, Requires Registration, No API available, Limited SSML customization. and No Free Version