Tone vs detection
Grammarly's humanizer offers preset voices and can learn your writing style. That is useful for making a draft sound like you. Its goal is natural tone rather than a specific detector score, so it does not tell you how the result scores.
The Humanizer is built around that score. Each rewrite targets the patterns AI detectors measure, such as predictable word choices, uniform sentence length and stock transitions, and comes back with its ZeroGPT and Sapling scores attached.
Checked on Grammarly's own detector
Grammarly also offers an AI detector. We use it as an independent check on our rewrites, since it plays no part in how The Humanizer picks a result. Essays and blog posts written by ChatGPT that scored 98 to 100% AI there typically came back at 0 to 20% after one Enhanced rewrite.
Results vary from text to text, which is why every run shows you its own scores. Check your final version before you submit and edit any sentence that still reads like a template.
What you get
- Two detector scores on every result, plus a side-by-side check of the original and the rewrite.
- Purpose settings for Essay, Email, Blog/Article and General writing.
- Meaning kept: facts, arguments, names, numbers and citations stay the same.
- Free without an account: 200 words per run, 5 runs a day.
- Paid plans from $9.99 a month (or $4.99 a month billed yearly) for 1,000 words per run; Pro allows 3,000.
Use both if you like
Many writers keep Grammarly for spelling and grammar and use The Humanizer before the text goes through an AI checker. A good order is: humanize here, check the score, then run a final spelling pass. Light grammar fixes rarely change the score much, but heavy rewrites by any tool can, so check the exact version you submit with the free AI detector.
More guides: bypass Turnitin, bypass GPTZero, essay humanizer.