Every programming language has its pros and cons. And many of them overlap. A product’s success has nothing to do with which language or framework you choose.

Every programming language has its pros and cons. And many of them overlap. A product’s success has nothing to do with which language or framework you choose. They are there to help you develop something that works as per your needs. You mentioned your product deals with chat messaging. So I would suggest using something like NodeJS + SQL for the backend. NodeJS for its ability to handle high volume of events. SQL for managing the chat history of each person in a relational way. My two cents worth :)