Rasa Core might be a bit more popular than Api.ai. We know about 1 link to it since March 2021 and only 1 link to Api.ai. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also, when I try to find more help in the AutoVoice documentation/help menu under the Advanced Commands section it points me to an outdated dead end: a now "private" YouTube video and the URL https://api.ai which is a dead URL. Source: over 1 year ago
Here is a link to the model that I have begun using Https://rasa.com/docs/rasa/playground/. Source: about 1 year ago
Botpress - Open-source platform for developers to build high-quality digital assistants
Octane AI - Octane AI offers tools to create a bot and engage customers and audience via messaging.
Dialogflow - Conversational UX Platform. (ex API.ai)
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
Messenger Platform - Discovery, chat extensions, and richer experiences
IBM Watson - Watson is the AI platform for business.