Olyo - Direct marketing via Facebook Messenger
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Epichat for Messenger - Raise your social media marketing to the next level
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
Upcado - Super easy to use Messenger Marketing tool for your business
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.