Amazon Lex is ranked 3rd in Chatbot Development Platforms while Rasa is ranked 4th in Chatbot Development Platforms. Amazon Lex is rated 9.0, while Rasa is rated 0.0. The top reviewer of Amazon Lex writes "Extremely stable with great speech recognition and helpful technical support". On the other hand, Amazon Lex is most compared with Google Dialogflow, Salesforce Einstein Bot, IBM Watson Assistant and Microsoft Azure Language Understanding, whereas Rasa is most compared with Google Dialogflow, IBM Watson Assistant, Microsoft Azure Language Understanding and ServiceNow Virtual Agent.
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