I ordered the development of one application when I worked on a cryptocurrency investment project. At that time we spent about $15,000 to develop a chat bot. The development lasted about three months. But the chat bot was like an assistant for clients. Through it, it was possible to find out everything, as well as to communicate and find out some details. Plus it had all the information about the futures rate and gave an approximate forecast. Here in this ChatBot Development company
https://owlab.group/case-studies/red-bus we ordered everything. Also the chatbot came with full documentation, test results, etc.