ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
Custom Bots by Intercom - Create your own custom bot, no code required
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
Faqbot - Build your chatbot for FAQ, sales and lead generation automation.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Clippy for your website - A helpful and familiar friend for your website visitors