Amazon Polly - Named for a parrot, Amazon Polly is a text-to-speech (TTS) software that makes your text come to life in a natural, authentic way. The software has many lifelike voices, both male and female, and in a variety of languages.
Dialogflow - Conversational UX Platform. (ex API.ai)
Nativeway - Practise with AI for pronunciation
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Api.ai - Api.
Botpress - Open-source platform for developers to build high-quality digital assistants