Harper – an open-source alternative to Grammarly

LanguageTool (a Grammarly competitor) is also open source and can be managed locally:

https://github.com/languagetool-org/languagetool

I generally run it in a Docker container on my local machine:

https://hub.docker.com/r/erikvl87/languagetool

I haven't messed with Harper closely but I am aware of its existence. It's nice to have options, though.

It would sure be nice if the Harper website made clear that one of the two competitors it compares itself to can also be run locally.