
Duden-Mentor
8.4#6 in grammar checkersFrom €2.99 a monthFree planWebAPIExtensionmacOS
Visit
No prices published.
It suits German writers who want spelling, grammar, punctuation and style suggestions, including those writing for Germany, Austria or Switzerland. Browser and Word users can use its listed extensions and add-in, subject to the stated version requirements.
You want what its maker publishes above — check its page for the details.