It’s almost too perfect to be a troll:
If you’re not familiar with the subject:
Grammarly is an English language writing-enhancement platform developed by Grammarly, Inc., and launched in 2009. Grammarly’s proofreading and plagiarism-detection resources check more than 250 grammar rules.
Grammarly is available as an online text editor or free browser extension for Chrome, Safari, and Firefox.
Now, of course, I’m wondering why he needs an alternative all of a sudden.