Is Grammarly's AI Humanizer free?

Yes. Grammarly's AI Humanizer page says the tool on the page is free and offers basic humanization. A free Grammarly account adds four voices, a custom voice and six languages, and Grammarly Pro is listed at US$12 on its plans page .

What is the word limit on Grammarly's AI Humanizer?

Grammarly doesn't publish one for the free page tool. Our box states its limit: 20 to 1,000 words per run, with 5 runs a minute and 20 a day per connection.

Do I need an account for a Grammarly Humanizer alternative?

Not for ours. The box runs with no signup or email in all three tones. Grammarly's page tool also runs without an account, but its styles and languages need a free one.

Does Grammarly's humanizer help with AI detectors?

Grammarly says the humanizer is not intended as a way around AI detectors, and it encourages users to acknowledge AI use. We take the same view: no rewrite tool can promise how a detector will score text.

Grammarly Humanizer Alternative for ChatGPT Text

Updated November 8, 2026. Features and prices were read on each vendor's own page on November 8, 2026.

Grammarly AI Humanizer vs ChatGPT Humanizer: the published facts

Same fields as our best ChatGPT humanizer comparison, read on November 8, 2026.

Field	ChatGPT Humanizer (this site)	Grammarly AI Humanizer
Free use	Yes	Yes, basic humanization on the page
Signup for free use	No	No for the page tool; a free account adds styles and languages
Words per run	20 to 1,000	Not published
Tones or modes	Casual, Professional, Academic	Four preset styles plus a custom voice (free account)
Languages	Not specified	6: English, Spanish, French, German, Portuguese, Italian
Lowest paid price listed	No paid plan listed	Pro US$12; billing period not shown in the plans page text
Vendor's detector claim	None; says it cannot promise detector scores	Says it is not intended as a way around detectors
Source	Our box	AI Humanizer page, plans page

Why people look for a Grammarly Humanizer alternative

Three things on Grammarly's own pages tend to send people looking.

The best parts sit behind an account. According to the Grammarly AI Humanizer page, the tool on the page offers basic humanization for free, while a free Grammarly account adds the Humanizer agent with four voices, a custom voice built from a writing sample, and six languages. That's a fair trade for many people. If you only need one draft fixed today, it's an extra step.

There's no published word limit. Grammarly doesn't state how many words the free page tool takes in one go. If your ChatGPT draft is a full cover letter or a 900 word report, you won't know until you paste it.

It sits inside a bigger product. The page leads into Grammarly's AI detector, plagiarism checker, citations and Authorship. If you already use Grammarly, that's a plus. If you just want one rewrite, it can feel like more than you came for.

None of that makes the tool weak. It means the alternative worth considering depends on which of those three bothers you.

Where Grammarly is ahead

Be clear on this before you switch. On published features, Grammarly offers things our box does not:

More styles. Four preset voices plus a custom voice that learns from a sample you paste. Our box has three tones and no custom voice.
More languages. Six named languages with a free account. We don't specify languages for our box.
Transparency tools. Grammarly's page describes Authorship, which shows what came from AI, from online sources and from you, plus tools to cite AI use. For coursework where disclosure matters, that's useful.
A clear stance on detectors. Grammarly says the humanizer is not intended to get around AI detectors and encourages people to acknowledge AI help. We take the same position, and it's the reason Grammarly ranks first in our comparison of nine ChatGPT humanizers.

Where our box is the simpler choice

Our box does one job. Paste a ChatGPT draft, pick a tone, copy the result.

No account, ever. The box runs without signup or email, for every tone.
A stated run size. 20 to 1,000 words per run, so you know a full page of ChatGPT output will fit.
A stated cap. 5 runs a minute and 20 a day per connection, so you know where the free limit is.
Built for ChatGPT drafts. Every guide on the site is about the habits ChatGPT drafts share: stock openers, even sentence lengths, hedges and lists of three.

If you'd like to see how it handles your own writing, paste a ChatGPT draft into the box and compare the result with what Grammarly gives you on the same text. That's a better test than anything we could write here before our own test runs.

Who should stay with Grammarly AI Humanizer?

Stay with Grammarly if any of these fit:

You already have a Grammarly account and use it daily. The humanizer sits next to tools you know.
You write in Spanish, French, German, Portuguese or Italian as well as English.
You want a custom voice trained on your own writing sample.
You need to show your work. Grammarly's Authorship and AI citation features are built for that.
Your organization pays for Grammarly Pro already, in which case there's nothing to buy.

Switch, or use both, if you want a no-account rewrite of a long ChatGPT draft and three tones are enough.

Switching from Grammarly: what to keep

You don't have to choose one. Many people keep Grammarly for grammar and tone suggestions while they write, and use a separate box only for the step where a ChatGPT draft needs a new voice. If you do switch the humanizing step, keep these habits:

Keep the disclosure habit. Grammarly's page pushes users to acknowledge AI help. That advice holds whichever tool you use.
Keep your voice sample. If you built a custom voice in Grammarly, the sample paragraphs you pasted are still useful. Keep them open beside our box and read the rewrite against them.
Keep checking facts. No humanizer, theirs or ours, checks that a date or figure is still right after a rewrite.

Nothing needs exporting. Our box doesn't store your text after the rewrite is returned, so there's no history to move in either direction.

How we compared the two

This page uses the same fields as every comparison on the site, filled from each vendor's own pages on November 8, 2026. We confirmed grammarly.com as the official domain before citing it. The full method is on how we test humanizers: every tool gets three sample drafts (a short essay paragraph, a work email and a product description) and is checked for meaning kept and readability.

This comparison weighs published features and limits. The fairest way to judge output is to run the same three drafts through both tools yourself.

Comparing other options? See our QuillBot AI Humanizer alternative page for a tool with a published 125-word free limit, or the Undetectable AI alternative page for a tool with a large free run and a detector-focused pitch.

A quick way to decide

Draft under a few hundred words, English only, already a Grammarly user: use Grammarly.
Draft up to 1,000 words, no account wanted: use our box.
Need a non-English language or a custom voice: use Grammarly with a free account.
Need to disclose AI help for coursework: Grammarly's transparency tools are the stronger fit.

Whichever you use, read the result against your original. Check every name, number and date before you send it.