| Quite a few depending on what level of control/functionality you are looking for. Some are more developer/write your own code focussed, other more graphically focused. In alphabetical order and not exhaustive. API.AI (now Google)
Chatfuel (YC)
Converse.AI (disclaimer, $currentstartup)
Flowxo
Gupshup.io
IBM Watson Engagement Advisor/Watson
Meya.ai
Microsoft Bot builder
Motion.ai
Wit.ai (Facebook) AWS also has a suite of tools that between them you could use, check out Lex, Polly & Steps All of these do one or more of the following: NLP
User management
Messaging Platform Integrations
Conversation State & Context Management
Workflow
Human Escalation
Backend integrations (Helpdesk, CRM etc)
Analytics Pick your poison based on what you need :) |