Entity Extractors Comparison

Hi! I was wondering if anyone can help me with the advantages and disadvantages of the various Entity Extractors that Rasa offers, ie:

  • MitieEntityExtractor
  • SpacyEntityExtractor
  • CRFEntityExtractor
  • DucklingEntityExtractor
  • DIETClassifier
  • RegexEntityExtractor
  • EntitySynonymMapper

Has anyone done some research into which are the fastest/slowest, take up more memory, provide a wide range of entities they can extract (like time, date, money), are better suited as a pair etc. ?

Thank you :slightly_smiling_face:


Hi Anne,

This blog post is a good place to start.


@anne576 Hello, very interesting and research oriented question, I hope this link with help you more in concise ways : and for main link please ref: Components (Hope you already seen this :slight_smile: ) Good Luck!