Grammarly tells you it reads as AI. It will not tell you which words.
Grammarly Pro detects AI-generated text and gives you a percentage. What it does not do is name the phrasing that produced it and swap it, because "delve into the rich tapestry" is flawless English and a correctness checker has no reason to touch it.
| RemoveAISlop | Grammarly | |
|---|---|---|
| Spelling and grammar | 49,000-word dictionary in US and British English, 16 grammar rules | Larger rule set, decades of tuning, and better at commas and style than we are |
| AI detection | We refuse to give an authorship verdict, because no honest tool can | Pro detects AI-generated text and returns a score |
| AI phrasing, named and rewritten | 722 catalogued terms, 27 sentence patterns, 22 formatting habits, with the exact words shown and swapped | A detection score rather than the phrases. "Delve into the rich tapestry" is correct English, so nothing is flagged to change |
| Readability | Flesch reading ease and grade, plus the specific long and sticky sentences | A readability score and suggestions |
| Does it send your writing to a model? | No. Rules only. There is no model client in the product | Yes for its generative features, under its own terms |
| Same draft, same result | Always. Rules are deterministic | Its generative suggestions vary between runs |
| Plagiarism checking | No. It needs an index of the web and we do not have one | Yes, on Pro |
| Generative writing | None. Nothing here writes anything you did not | 3,000 AI prompts a month on Pro, unlimited on Enterprise |
| Price | Free unlimited checking. $9.99 a month for unlimited rewriting | Free tier, then $12 a month billed annually. Enterprise is contact-sales |
Where Grammarly does something better, the row says so. Checked against their public documentation and pricing on the date above.
Try it on your own draft
Frequently Asked Questions
Should I cancel Grammarly and use this instead?
For the final check before you publish, this covers spelling, grammar, readability and the AI phrasing in one pass, so a lot of people will not need both. Keep Grammarly if you use its plagiarism checking, its generative writing, or its comma and style suggestions, which are better than ours. What we do that it does not is name the phrases that read as machine-written and rewrite them, rather than returning a score.
Why does Grammarly not flag AI phrasing?
Because there is no error to find. "It is important to remember that fostering innovation stands as a testament to human ingenuity" is grammatically flawless, so a correctness checker has no reason to touch it. It is answering a different question, and answering it correctly.
Do you use AI like Grammarly does?
No. The engine is a catalogue and a set of rules, so the same draft always gives the same result and nothing you write leaves our server. A tool for removing the fingerprints of a language model has no business sending your work to one.
Is Grammarly good at detecting AI writing?
Its Pro plan detects AI-generated text and returns a percentage, so it will tell you whether a draft reads as machine-written. What it does not do is show you the phrases responsible, which is the part you need if the draft is yours and you have to publish it. A score answers "is this AI"; the work in front of you is "which words do I change".
Why does my Grammarly-checked text still sound like AI?
Because none of what makes it sound that way is an error. "Delve into the rich tapestry", "it is important to remember that", "stands as a testament to" are all grammatically perfect. A correctness checker returns them clean because they are clean. What gives a draft away is vocabulary that models over-produce, sentences that all run 14 to 18 words, and openers and closers that follow a formula, and none of those break a rule.
Can I use both together?
Yes, and plenty of people should. Run Grammarly for the correctness pass and its style suggestions, then run this as the last check before publishing, for the phrasing that reads as machine-written. They do not conflict: we do not touch commas, and it does not touch vocabulary that is already correct.
Is there a free alternative to Grammarly?
For checking, this is free and unlimited with no account: spelling against a 49,000-word dictionary, 16 grammar rules, readability, and the AI phrasing. Grammarly has a free tier too, and it is better than ours at commas and style. What it does not include on that tier is plagiarism or AI detection, which are Pro features.
Does Grammarly store what I write?
That is a question for their terms rather than for us, and their generative features send text to a model by design. What we can tell you about this side is exact: your draft is processed and returned, never written to a database, and there is no model client in the product to send it anywhere. If you are under an NDA that forbids third-party processing, that distinction is the one that matters.
Does Grammarly catch British spelling?
Both tools handle it. Ours accepts American and British spellings as equally correct, so "organise" and "organize" both pass and neither is flagged, which matters if your team writes in a mix. Grammarly asks you to pick a dialect and then enforces it, which is the better behaviour if you want consistency imposed.
Which one should I use for a blog post I wrote with ChatGPT?
This one, and it is the case the product was built for. A correctness checker will pass a ChatGPT draft almost entirely, because the output is grammatical. What you need is the over-used vocabulary named, the flat sentence rhythm broken, the formulaic opener cut, and the spelling and readability checked in the same pass. That is one paste rather than four tools.
One pass, before you publish
Spelling, grammar, readability and AI phrasing in a single check, and the rewrite that fixes them.
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