Jasper - Jasper is an open source platform for developing always-on, voice-controlled applications.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Pullstring - Powering computer conversation across all platforms.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
ChatterOn for Messenger - Build Facebook chat-bots in under 5 minutes
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community