Rasa Core might be a bit more popular than marbot. We know about 1 link to it since March 2021 and only 1 link to marbot. 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.
Here is the link: https://marbot.io/ (marbot comes with a 14 day free trial). Source: over 2 years ago
Here is a link to the model that I have begun using Https://rasa.com/docs/rasa/playground/. Source: about 1 year ago
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