Chat Website and APP like telegram for ready-selling.

I am looking for some product that is ready for selling to us.
It should be website and Mobile app also with server management functionality with admin.
I will need to check first all perfect functionality on your server domain.
And then i will ask for it with all source code with setup method.
I will give enough funds for this.
Only someone that have product what i want and need should come to bid on this project.
I will feel that you are right person that you add sellingapp string into your description.
Thank you.