What are some alternatives?
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Botpress - Open-source platform to create, manage and extend bots
Pipefy - The new development platform built for agile teams.
Microsoft Bot Framework - Framework to build and connect intelligent bots.
Microsoft Flow - Similar to IFTTT and Zapier you can create automated tasks based on APIs from various services.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.