[patrakov]

LanguageTool is not open source; it is open core. There are proprietary "premium rules," and you won't get them in a self-hosted version.

[dns_snek]

Self hosted & open core seems distinctly better than an open wrapper around a black box core that's hosted by a 3rd party.

[conradklnspl]

They use the LGPL license for a lot of their work.

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