- What the Humanizer agent does to your draft
- Where the Humanizer lives, and where it doesn't
- Who gets it on each Grammarly plan
- Build a custom voice in five steps
- Humanizer, Paraphraser or AI Rewriter: which agent does what
- Why Grammarly's own AI Detector may still flag it
- How I'd fit the Humanizer into a writing routine
- Frequently asked questions
Grammarly's AI Humanizer is an agent that rewrites AI-sounding text so it reads more naturally and more like you, and as of Nov 2026 it's open to Grammarly Free, Plus and Pro subscribers inside Superhuman Go and Grammarly's docs writing surface. The catch is in Grammarly's own help centre: text the Humanizer rewrites comes from Grammarly's LLM, so Grammarly's own AI Detector is likely to flag it.
That second sentence is the part most people searching for this never read, so it gets its own section below. First, what the agent does and where it lives.
What the Humanizer agent does to your draft
Grammarly's user guide calls it an editor with emotional intelligence. Its job is to take writing that came out of an AI tool and fine-tune it so it sounds more natural, sincere and human: strip out robotic phrasing, add warmth or nuance, and keep your voice recognisable to the people reading it. The examples Grammarly gives are everyday business writing: an email, a proposal, a blog post.
It doesn't hand you one rewritten block and walk off. The Humanizer tab shows detailed suggestions, and bars appear down the left side of your text. Hover over a bar and you get an actionable feedback prompt that tells you how to change that passage to fit the voice you picked. You decide what to take and what to leave.
Where the Humanizer lives, and where it doesn't
As of Nov 2026, Grammarly lists two places. One is Superhuman Go, the AI assistant from Superhuman, the suite Grammarly now belongs to. The other is docs, Grammarly's AI writing surface at app.grammarly.com. It isn't a button sitting among the classic red and blue underlines in your inbox.
To open it in docs, click the Humanizer icon on the agents tab on the right side of your document. When I checked, the docs guide named 11 agents in that panel, including AI Chat, Paraphraser, Reader Reactions, Citation Finder, AI Detector, AI Rewriter, Plagiarism Checker, AI Grader and Authorship.
One practical warning from the same guide: if you upload a document into docs and export it again, some things don't survive the trip. Grammarly lists images, charts, graphs, citations, formulas, bookmarks, comments and text columns. So paste in the text you want to work on, not the finished, formatted proposal.
Who gets it on each Grammarly plan
| Plan | Where you get the Humanizer | Who controls access |
|---|---|---|
| Grammarly Free | Superhuman Go and docs | You |
| Grammarly Plus | Superhuman Go and docs | You |
| Grammarly Pro | Superhuman Go and docs | You |
| Grammarly Business, Enterprise and Education | Docs only | Your admin, on the Agent access page |
Team plans are where people get stuck. Admins of Business, Enterprise and Education accounts can switch individual agents on or off for everyone or for specific member groups. Docs itself also has to be switched on: Grammarly says admins must enable Grammarly Editor, Docs with agents, AI assistant and paragraph-level rewrites. If the Humanizer is missing on a work account, that's usually why, and it's a question for whoever runs your Grammarly admin, not a bug.
Build a custom voice in five steps
The preset voices are fine for a quick pass, but the custom voice is the feature worth ten minutes of setup.
- Open the Humanizer from the agents tab on the right side of your document.
- Click Create a voice.
- Give the voice a name you'll recognise, such as the brand or the person it belongs to.
- Add a writing sample of 200 words or more as the style reference. Pick something that already sounds like you at your best: a newsletter you're proud of, a sales email that landed, a blog post you wrote by hand.
- Select the voice and work through the suggestions, hovering over each bar on the left to see the prompt for that passage.
The sample is the whole game. Feed it a stiff, corporate paragraph and you'll get stiff, corporate suggestions back. If you write for more than one brand or client, make a separate voice for each one.
There's a bonus here. Voice profiles are shared between the Humanizer and the Paraphraser, so a voice you create in Superhuman Go or docs shows up in both agents, in both places.
Humanizer, Paraphraser or AI Rewriter: which agent does what
Grammarly now has several agents that sound like they do the same job. They don't, and picking the wrong one is the most common reason people say the Humanizer didn't help.
| Agent | What it does | Plans as of Nov 2026 |
|---|---|---|
| Humanizer | Rewrites AI-sounding text so it reads more naturally and closer to your chosen voice | Free, Plus and Pro in Go and docs; team plans in docs |
| Paraphraser | Paragraph-level rewrites in one of six preset styles, one of them called Humanize, or in your own voice | Pro and Plus in Go and docs; Free gets a limited number of suggestions a day |
| AI Rewriter | Flags words and phrases AI often uses and suggests ones AI uses less | Pro and Plus in docs, rolling out gradually |
| AI Detector | Shows how much of your text appears AI-generated | Depends on your plan and app |
The AI Rewriter is the one I'd pay most attention to if you're editing, because it shows its working. It sorts highlighted phrases into four bands: All AI phrases, Almost always AI, Usually AI and Sometimes AI. Hover over a bar and it offers several alternatives you can accept or dismiss. Grammarly says it built the agent partly to teach students which phrases tend to get flagged, and that lesson is just as useful for a marketing team.
Why Grammarly's own AI Detector may still flag it
Here's the bit that surprises people. In its AI Detector user guide, Grammarly says that if you work with its other agents to rewrite your text, the AI Detector is likely to flag your content as AI-generated. The reason it gives is that rewrites from the Grammarly, Paraphraser and Humanizer agents come from Grammarly's own LLM.
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So running a draft through the Humanizer and then through the AI Detector doesn't wash it clean. Grammarly expects the opposite. Its advice is to use the agents to get feedback and make the changes yourself, rather than letting them rewrite text directly.
A few more lines from the same help page are worth knowing before you trust any score:
- Grammarly says it doesn't offer a dedicated feature to reduce an AI score. It suggests treating the result as one data point when you decide how to edit, rephrase and credit your sources.
- The percentage shouldn't be used as an objective source of truth, because AI detection of any kind can be prone to errors.
- Grammarly's detector runs on its own in-house model, so other tools such as Turnitin, GPTZero and Copyleaks may give a different score.
- Ordinary red and blue underline corrections typically shouldn't move the score, but meaningful rewrites of sentences and paragraphs with Grammarly's generative tools will raise it.
If you're a student, there's no clever workaround here, and I wouldn't go looking for one. Check what your instructor allows before you use generative AI on an assignment. If you did use it, the AI Detector offers a Generate citation button for APA, MLA and Chicago styles. If Grammarly isn't the right fit for your writing at all, there's a rundown of alternatives to Grammarly.
How I'd fit the Humanizer into a writing routine
I'd use the Humanizer as a fault-finder, not a disguise. Run it on a draft, read where the bars light up, and fix those sentences in your own words. That's what Grammarly itself recommends, and it's also how you end up with writing that sounds like a person wrote it. Skip it as a one-click way to make AI text pass a detector: Grammarly's own help pages tell you it won't.
For business writing, the best use I can see is consistency. Build a custom voice from your strongest newsletter, let the Paraphraser share it, and use both on the emails and proposals your team drafts with AI. Then run the AI Rewriter now and again to train your eye. After a while you'll spot the giveaway phrases before any agent does.
If you'd like to compare other tools that do this job, there's a roundup of free AI humanizer tools, and for broader rewriting there's a comparison of AI rewriter tools. Agent access and plans change often, so check Grammarly's own Humanizer user guide for the latest; everything above is as of Nov 2026.
If your team writes with AI every day and wants it to still sound like your brand, that's the kind of AI training I run. I run AI training and workshops for teams, and help businesses with AI enablement and workflow automation, so the busywork runs itself and people get time back. Most of that work is with SaaS marketing teams and small businesses. Here's how we can work together.
Frequently asked questions
Is Grammarly's Humanizer free?
Yes. As of Nov 2026 Grammarly lists the Humanizer for Free, Plus and Pro subscribers in Superhuman Go and docs. Business, Enterprise and Education users get it in docs only, if their admin allows it.
Will Grammarly's AI Detector flag text I ran through the Humanizer?
It's likely. Grammarly's AI Detector guide says rewrites from the Grammarly, Paraphraser and Humanizer agents come from its own LLM, so the detector is likely to flag them. It suggests using the agents for feedback and making the changes yourself.
How long does the custom voice sample need to be?
Grammarly asks for a writing sample of 200 words or more as the style reference when you click Create a voice.
Is the Humanizer the same as the Paraphraser's Humanize style?
No. Humanize is one of six preset styles in the Paraphraser, while the Humanizer is a separate agent. They do share your custom voice profiles.
Why can't I see the Humanizer on my work account?
On Business, Enterprise and Education plans it's only in docs, and admins can turn individual agents off on the Agent access page. Ask your Grammarly admin.
