What are some alternatives?
When comparing Botfuel and IBM Watson Assistant, you can also consider the following products
Conversational Form - Turning web forms into conversations. By SPACE10
Aivo - Skyrocket your Customer Service and Sales KPIs with a Chatbot powered by Artificial Intelligence. Give time back to people.
Botpress - Open-source platform to create, manage and extend bots
Zendesk Answer Bot - Chatbots
Tars - TARS enables users to create chatbots that replaces regular old webforms.