Nowadays, Amazon AWS, Google Cloud and Microsoft Azure offer TTS service. The form of their services is a technical API. So you may need a tool that helps you to manage the TTS service. This is what CyberBukit TTS can do for you. Please note that CyberBukit TTS cannot do the Text-to-Speech work, the tough work is actually done by AWS or Google Cloud or Microsoft Azure. So you may have extra costs in using TTS (They also offer a free tier if you don’t use too much). This two links about pricing may be helpful.