Cost to Develop an App like Google Assistant

Factors influencing the price:
AI feature complexity:
The development of basic voice commands and simple responses will be less expensive than that of sophisticated context awareness, natural language understanding, and customized responses.
Connectivity to external services:
Development time and possible API expenses increase when connecting to multiple third-party services, such as online accounts, smart home devices, and calendars.
Platform support: It takes more time and effort to develop for many platforms (iOS, Android, and the web).
Knowledge of the development team:
AI developers with particular knowledge and experience will fetch higher fees.