Garbage. Makes you constantly log in, but won't actually work on Google Docs or most other things. Even clicking on the extension shows a blank space. Grammarly has abandoned Firefox and should just admit it.

add more languages!

Was useful for a few years despite sometimes slowing down the browser, then started feeding garbage to its IA to train it, resulting in crappy "corrections". It's now only good to write sms full of misspelled words.

Charging $300 for not working app. Crap

I am logged in and Grammarly telling me to log in.... just amazing how you took a great service and you make it worse...

I keep trying to sign in to my existing account as prompted in an email. It says to sign up, when I click, change to sign IN, enter my email address, click continue, it just flashes and goes nowhere. When I go back to email the message is still there. Even now I am logged in but still prompts me to sign up.

signup for an advertising commercial , lack instructions

It stopped working on Firefox.

does not work on firefox at all

Can't do spell check anymore, needs Premium. But getting a lot of features, which may Improve the writing, but looked behind a paywall.
Now it only shows me, that I have done something wrong, but doesn't show me that.
For a non English Native, it helped me a year prior, but not anymore.

Annoying. Gets in the way of me writing text.

Over the past few months, Grammarly has stopped working properly across all the platforms I use, including Gmail. I’ve tried uninstalling and reinstalling multiple times, but the issues persist. What’s more frustrating is the complete lack of accountability once they’ve debited your account for the yearly subscription fee.

Getting real human support is almost impossible—you're just redirected to "try this" or peer-help forums, which offer no real solutions. It feels like once they've taken your payment, they’re no longer concerned about providing proper service.

Even when Grammarly was working, it had inconsistencies—if I copied and pasted text between programs, the corrections would often differ. For a service that’s supposed to ensure clarity, they really need to take more responsibility for their own performance.

Just flat does not work. Nothing shows up. Try it with Reddit, nothing. Try it with Reddit Private, Does not work.

I would rate this higher, but the constant nagging to upgrade to premium is a non-starter for me. I don't appreciate having my composition constantly interrupted by bad highlighting just to advertise your premium product. Fix your UI or suffer more negative reviews. The way you've designed your app is absolutely unprofessional.

Terrible. It always points out non-existent "advanced issues", requiring a paid subscription to fix, and constantly rips up my perfectly-good text.

Furthermore, the UI is terrible. The only thing it is good for is a spell checker, but we all have these built-in.

Do not recommend.

So, many apps want all the site info we visit and all the data it collects. Though some reviews talk about constant advertising to go premium, I'll see how it compares to AI Grammar Checker & Paraphraser – LanguageTool. Maybe it'll have easier ways to write lazily, so I can use the spelling/grammar check to quickly, simply fix all my errors.

Too much spam like "Auto-activation filters..." I didn't pay for that

Does not work. After signing into the website and my paid premium account, the add-on indicates that I am not signed in. I tried to get help from customer support but they couldn't fix it.

Used to be good, but now is constantly advertising "premium" features which were standard. Using LanguageTool now
https://addons.mozilla.org/en-US/firefox/addon/languagetool/

Used to like it, but with "premium suggestions" that can't be disabled it turned from helpful to insufferably annoying. Switching to LanguageTool, hope it'll be better. If not - I'll be better off without a grammar checker than with something that just doesn't like my writing style and won't shut up.