What are some alternatives?
When comparing Grammarly and Druide Antidote, you can also consider the following products
Google for Education - Google for Education takes the cast analytical knowledge of Google and transforms it into a platform that educators can use to better communicate with their students in innovative ways.
Hunspell - Hunspell is the spell checker of LibreOffice, OpenOffice.
Technolutions Slate - Slate is an Ed Tech solution that provides outreach, travel management, online applications, and online reading.
Ludwig.guru - Linguistic search engine and contextualized translator. The final solution for your writing doubts!
Lockdown Browser - LockDown Browser prevents cheating during proctored online exams. Learn how it integrates with Blackboard Learn, Canvas, Brightspace, Moodle, and more.
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.