Has anyone found an alternative?

I made a little script with no settings, that checks each post, get the list of words, filter words like “the”, “I”, “today”, … And add the most used words in the articles (I can define the number in the script) as tag. I didn’t find better tools.
It just need a list of words to filter you can find on the internet, I only have the French one.

If you are interested I can give you the script.

Can you share the script with me?

Sure, you can download it here: tagextractor.zip

Thanks ??

Very nice. Thanks. How is it used? Would be a great plugin as the other is not updated anymore