There are many Chat Bots are there in the market and are you in a confusion to select which one to use? and the pros and cons as a clear comparison then have a look at the following article
https://chatbotsjournal.com/25-chatbot-platforms-a-comparative-table-aeefc932eaff
https://chatbotsjournal.com/25-chatbot-platforms-a-comparative-table-aeefc932eaff