Avochato - Text messaging for your business.
Dialogflow - Conversational UX Platform. (ex API.ai)
Message Me - Website to create your contact business card
Octane AI - Octane AI offers tools to create a bot and engage customers and audience via messaging.
Slack with your Users - Speak to your app's users entirely within Slack
Botpress - Open-source platform for developers to build high-quality digital assistants