Read this article if...
you're hunting for the best ai humanizer and tired of your content being flagged as “AI-written.” Trust me, you’re not alone!
I’ve tried every tool in this list, from AIDetectPlus down to Humanize AI. I’m spilling all the secrets you need to know.
If you skip this, you’ll miss my honest thoughts on tools like Quillbot, Ahrefs, and even stealth options like Stealthwriter and Decopy AI.
Wondering what actually works, what flops, and which one’s worth your time? I’ll break down features, quirks, and who each tool suits best.
You’ll even see a quick comparison table, so you don’t waste hours bouncing between random reviews and forums.
This isn’t your average roundup. I dug deep, tested them myself, and I’m keeping it real about pricing and legit results.
If you want content that passes those AI checkers and sounds natural, don’t miss what comes next.
Before I ramble on, here’s a table of contents so you can skip straight to the juicy details:
- Best AI Humanizer Comparison Table
- #1 - AIDetectPlus
- #2 - Quillbot
- #3 - Ahrefs AI Text Humanizer
- #4 - Surfer AI Humanizer
- #5 - Walter Writes AI
- #6 - Stealthwriter
- #7 - Decopy AI
- #8 - Humanize AI (Humanizeai Io)
- Which AI Humanizer is Right for You?
8 Top AI Humanizer Tools Reviewed (2025 Table)
| Tool Name | Pros | Cons | Pricing |
|---|---|---|---|
| AIDetectPlus |
|
|
$9/5k words, $14/20k, $24/40k, $19/mo unlimited |
| QuillBot |
|
|
Free limited; premium from $9.95/month |
| Ahrefs AI Text Humanizer |
|
|
100% free, unlimited use |
| Surfer AI Humanizer |
|
|
Free trial; paid starts $79/month |
| Walter Writes AI |
|
|
Plans: $10, $19, $56/month; no credit rollover. |
| StealthWriter |
|
|
Free 300 words; paid plans from $20/month |
| Decopy AI |
|
|
Always free, no fees |
| Humanize AI |
|
|
Free 200 words daily, paid from $8/month |
#1 - AIDetectPlus
What does AIDetectPlus Do?
So, AIDetectPlus is basically your go-to if you want to detect AI-written stuff, humanize your content, and write essays that fly under the radar—all wrapped up in one simple dashboard. No subscriptions, no hidden tricks, just one-time payments and you’re set.
Does it Have a Free Trial?
You can totally give it a spin for free. There’s a 1000 word trial waiting for you, and seriously, there’s no credit card required. Just copy-paste your text and see how it performs straight away.
What Does AIDetectPlus Do Well?
- If you’re a student, marketer, or teacher, AIDetectPlus has detectors and humanizers that really fit your needs. They made special versions just for students, marketers, and teachers.
- Honestly, pricing is way more friendly than other tools out there. You pay once for credits and they literally NEVER EXPIRE. You only buy more if you need a refill, so your investment sticks around.
- All-in-one magic: With AIDetectPlus, you don’t just check and humanize text. You can also use their essay writer, plagiarism checker, paraphraser, and even chat with your PDFs. And yes, they’ve got a free LLM chatbot in there as well.
- The humanized text actually comes out clean—no awkward grammar and you don’t have to mess around fixing things after. Plus, there’s no maximum word limit per input, so you can go as big as you want.
- The interface is straightforward and customer support actually responds fast (which is rare). If you ever get stuck, they’ve got your back.
Take a look at what Natasha, who actually uses AIDetectPlus, had to say in her review:
“Really appreciated the straight forward pricing with no surprises! AI Detect Plus is an AWESOME tool to help polish up academic and professional writing.”
Where Does AIDetectPlus Fall Short?
- No Mobile App Yet: If you want to use AIDetectPlus on your phone, you’re stuck with the web version. It works fine, just not as smooth as a real app would be. But let’s be honest, most of us do this stuff on our computers anyway.
- Proprietary Algorithm: They don’t share the nitty gritty of how their detection works, so you kind of have to trust them on that. But that’s not unusual—most AI detectors keep their secrets locked up for obvious reasons.
What Does AIDetectPlus Cost?
- $9 (One-Time Payment) - You’ll get 5k credits (that’s 5k words) to use however you want—detect, humanize, check plagiarism, or write essays. It’s perfect if you just want to check it out.
- $14 (One-Time Payment) - This nets you 20k credits, and you don’t need to rush; use them whenever, they never expire.
- $24 (One-Time Payment) - You get 40k credits at a big discount. If you go through lots of words, this deal saves you some cash.
- Unlimited Plan - $19/month if you want unlimited everything. This one’s the most popular, and no contracts—you can cancel whenever you like.
#2 - QuillBot
What does QuillBot Do?
QuillBot is a go-to writing sidekick for rewriting, checking grammar, and polishing your text. It’s loaded with paraphrasing, summarizing, translation, and even plagiarism checking, so you get a full toolbox for fixing up anything you write.
Does it Have a Free Trial?
Yup, there’s a free plan! It lets you paraphrase up to 125 words at once and fix basic grammar in chunks up to 1,000 words. But honestly, those limits show up super quick, and the juicy features hide behind a paywall.
What Does QuillBot Do Well?
- Awesome for Paraphrasing: If you’re stuck on clunky sentences, QuillBot’s rewriting is super handy for smoothing things out, especially for essays, blogs, and ESL writing.
- Grammar and Tone Fixes: It catches awkward grammar blips and polishes up your tone, making stuff more readable for emails and summaries.
- Tons of Language Options: Need to work in a different language? It supports 40+ languages, so you’re covered there, too.
Where Does QuillBot Fall Short?
- AI Detection? Not Great: Even at its max settings, QuillBot’s “humanized” text still gets flagged by detectors like Turnitin and GPTZero almost every time.
- Reads Kinda Robotic: Sure, the grammar’s clean, but the sentences still feel stiff and easy to pick out as machine-made.
- Premium is Pricey: The plan starts at $9.95/month if you want the full toolset, so your wallet might notice.
- Not For Bypassing AI Detectors: If your goal is to sneak past AI checks, QuillBot just isn’t built for that—it misses the mark.
- Mediocre Readability: The finished text scores pretty low for natural flow and can sound off-target or inconsistent at times.
If you want to know more about QuillBot, you can read the in-depth QuillBot Review blog I wrote recently.
#3 - Ahrefs AI Text Humanizer
What does Ahrefs AI Text Humanizer Do?
It’s a free online tool from Ahrefs that tweaks your AI-generated text to make it sound more like an actual person wrote it, hoping to sneak past both AI detectors and real readers.
Does it Have a Free Trial?
You don’t even need a trial—this thing is totally free to use right on Ahrefs’ site, no signup required.
What Does Ahrefs AI Text Humanizer Do Well?
- Simple and Fast: Just paste your text, hit the button, and it spits out several “humanized” versions in seconds—no learning curve at all.
- Decent Grammar: Compared to other free tools, the output usually keeps sentences readable and doesn’t wreck grammar.
Where Does Ahrefs AI Text Humanizer Fall Short?
- Doesn’t Fool AI Detectors: Even after the tool does its thing, big-name AI detectors like GPTZero and Netus.ai still spot the content as AI-generated.
- Robotic Vibe Lingers: The rewrites can sound kinda formulaic or stiff, missing that really personal spark humans add.
- No Customization: You can’t tweak the output style or settings—what you get is what you get.
- Not Perfect for Creative Tasks: If you need something truly original or with lots of personality, you’ll still have to do your own editing.
What Does Ahrefs AI Text Humanizer Cost?
- It’s 100% free. You get unlimited tries and don’t need to sign up for anything. No upsells or credit systems—just open, paste, and go.
#4 - Surfer AI Humanizer
What does Surfer AI Humanizer Do?
Alright, so Surfer AI Humanizer is a tool that tries to make your AI-generated text sound way more human and less robotic, mainly to help content rank better and avoid detection online.
Does it Have a Free Trial?
Yeah, you can give it a spin for free, no signup required, but the word count is super tight—don’t expect to run long articles unless you upgrade.
What Does Surfer AI Humanizer Do Well?
- Super Simple to Use: Just paste your text in and see the results—no complicated steps at all.
- SEO-Focused Tools: Besides the humanizer, you get handy features aimed at boosting your Google ranking if you need them.
Where Does Surfer AI Humanizer Fall Short?
- Strict Word Limit: The free trial won’t let you process much text, which is kind of a bummer.
- Results Get Flagged: Even after “humanizing,” my samples mostly still got flagged as AI—so it’s not fooling detectors much.
- No Style Controls: You can’t tweak the tone or mode, so you’re stuck with whatever output it gives you.
- Not Reliable for Human Scores: The tool doesn’t always make your content pass as “human” in detection tests.
What Does Surfer AI Humanizer Cost?
- Free Trial: Limited word count, just enough to see if it helps you.
- Paid Plans: Start at $79/month (billed annually), and you get more words, plus SEO extras and even Google Docs and WordPress integration.
#5 - Walter Writes AI
What does Walter Writes AI Do?
Walter Writes AI is all about turning robotic AI text into real, human-sounding writing, perfect for sneaking past those tough AI detectors.
Does it Have a Free Trial?
Yep, you get a free trial with a generous word count to give it a proper test run. But if you want more, you'll need to grab a paid plan.
What Does Walter Writes AI Do Well?
- Super Human Touch: It makes AI content sound like someone actually wrote it—no more awkward robot vibes!
- Panic Button: Stuck with robotic text at the last minute? Walter swoops in fast and fixes it up—total lifesaver for deadlines.
- Ridiculously Easy to Use: Paste in your text, hit rewrite, and you’re done. No confusing menus or tech headaches.
Where Does Walter Writes AI Fall Short?
- No App Integrations: You can’t plug it into Notion, Google Docs, or anything else—kind of a pain if you want seamless workflows.
- Customer Support is Weak: If you ever need help or a refund, get ready for slow responses, canned answers, and lots of frustration.
- Shady Subscription Practices: Folks keep getting hit with annual charges when they thought it was monthly, and refunds are nearly impossible.
- Credits Vanish Monthly: Anything you don’t use each month just disappears—no rolling over to the next month.
- Not Foolproof: Sometimes, your “humanized” text still gets flagged by AI detectors, so it’s not a perfect shield.
What Does Walter Writes AI Cost?
- Starter Plan – $10/month for 10,000 words and 500 words per request. Unused words? They’re gone next month!
- Pro Plan – $19/month, covers 55,000 words and 1,200 words per request. Still, no rollover—use it or lose it.
- Unlimited Plan – $56/month, unlimited words, 1,700 per request. Premium price if you actually need that much every month.
- Watch out: You pay every month whether you use your credits or not.
#6 - StealthWriter
What does StealthWriter Do?
StealthWriter is an AI tool that rewrites your text to make it sound original and, supposedly, undetectable by AI detectors. It's aimed at folks who want to pump out content super fast, without anyone knowing it came from an AI.
Does it Have a Free Trial?
Yep, you can try StealthWriter for free, but it's got a 300-word limit and you’re stuck with just the Ninja model, which is the basic one. If you want access to more advanced features, you’ve got to pay up.
What Does StealthWriter Do Well?
- Super Easy to Use: The interface is crazy simple, so you can jump in and start rewriting stuff without any headaches.
- Multiple Rewrite Models: You can pick between the free Ninja model or go premium for the smarter Ghost model if you want a better rewrite.
- AI Detection Checker: It lets you instantly check if your new text is flagged as AI—handy for quick double-checks.
Where Does StealthWriter Fall Short?
- Fails Real AI Detectors: Even if StealthWriter says content is human, other detectors like Originality.ai can easily spot it as AI.
- Free Version is Very Limited: The free plan gives you just 300 words and only the basic model; not really enough for serious work.
- Ghost Model Costs Extra: If you want the fancier Ghost model, you have to go premium—a major drawback for budget users.
- Competes Against Free Tools: With ChatGPT out there for free, paying for StealthWriter can feel pointless.
- No Real Guarantees: There's no promise that your rewritten content will actually fool major AI detectors.
What Does StealthWriter Cost?
- Free Plan – $0/month, 300 words per rewrite, Ninja model only.
- Basic Plan – $20/month or $200/year, 400 words per rewrite, access to Ghost model.
- Popular Plan – $35/month or $350/year, 1,000 words per rewrite, even more words included.
- Premium Plan – $50/month or $500/year, 2,000 words per rewrite, for heavy users.
If you want to know more about StealthWriter, you can read the in-depth StealthWriter Review blog I wrote recently.
#7 - Decopy AI
What does Decopy AI Do?
Alright, Decopy AI is basically your Swiss Army knife for digital authenticity! Whether you wanna check if some text or even an image is AI-generated, get a quick summary of a long article, or sort out that confusing math problem – this tool does it all, totally free.
Does it Have a Free Trial?
No catch here – you get full access right away, no trial needed, and you don’t even have to make an account. Unlimited checks, zero hassle.
What Does Decopy AI Do Well?
- Actually 100% Free: Everything’s unlocked and you can use it as much as you like, no paywall or sneaky limits.
- No Sign-Up Needed: Paste your stuff and go – no annoying registration or personal info required.
- Privacy First: Whatever you put in doesn’t get used to train any AI – your data stays safe.
Where Does Decopy AI Fall Short?
- Text Detector Is Tough: Even real human-written text sometimes gets flagged as AI, which is kinda frustrating.
- No Fancy Tuning: You can’t really adjust or fine-tune the detection settings beyond basic stuff.
- Not Much Support: If you get stuck, there isn’t really any help or support team to reach out to.
- Basic Results Display: It’s straightforward, but you won’t get super detailed reports or analysis.
What Does Decopy AI Cost?
- Price Tag: $0, Always – All the features are completely free, no subscriptions or hidden fees ever.
#8 - Humanize AI
What does Humanize AI Do?
Humanize AI is all about making AI-generated text sound like it came from a real person and not a robot. It brags about dodging AI detectors like Turnitin or GPTZero, so your copy slips right through.
Does it Have a Free Trial?
Yup, Humanize AI gives you a free plan—no account needed—and it covers about 200 words a day. Handy if you just wanna test it out or aren’t churning out essays 24/7.
What Does Humanize AI Do Well?
- Bypasses Detectors: It’s one of the few budget-friendly tools claiming to sneak past top detectors like GPTZero (though results can be hit or miss).
- Lots of Writing Modes: You get to pick from Standard, Academic, Simple, or Formal—so it’s easy to match whatever vibe your teacher, boss, or client wants.
- SEO and Multilingual: Your keywords usually stay put, and it even handles more than 50 languages.
Where Does Humanize AI Fall Short?
- Doesn’t Always Fool the Best Detectors: If you’re up against Originality.ai, don’t be shocked if you get caught.
- Sometimes Mixed Results: The bypass rate is solid, but some users report a few close calls or fumbles with advanced systems.
- Basic Free Plan Limits: You only get 200 words a day for free—forget about tackling big projects unless you pay up.
- Mostly for Casual Users: It’s great for students and anyone on a budget, but not ideal for super strict academic or business needs.
- Ethical Gray Area: Using it to skirt plagiarism checkers feels sketchy—always double-check your school or work policy first.
What Does Humanize AI Cost?
- Free Plan – No sign-up needed with a 200-word daily limit, perfect for quick tests.
- Paid Plan – Starts around $8 per month, which is a steal if you need more words and don’t want to break the bank.
Which Is The Best AI Humanizer For Students And Researchers?
Let me be honest—most tools out there? Not worth it.
Here’s why you should probably avoid them:
- Reason #1: Terrible Customer Service: I’ve had to wait days for any sort of reply—sometimes I never even got help at all. When something went wrong, nobody seemed to care, and forget about getting your money back if things break.
- Reason #2: Overcharging for Credits: Way too many of these tools just eat up your credits if you don't use them up fast enough. Even on their so-called “annual” plans—your leftover credits? Poof, gone. It always felt like I was being tricked into buying more.
- Reason #3: Weird Errors and Flaky Results: Honestly, half the time the text comes out making no sense or sounds even more robotic than before. A couple times, it even failed the AI detector test—I mean, what’s the point of using a humanizer if it doesn't fool the AI checkers?
So what’s actually GOOD out there?
I’m not just hyping for no reason—AIDetectPlus fixed every one of those headaches for me. Want to know how?
First off, they give you a totally real free trial (1,000 words—no hidden stuff). But the best part?
- #1 The Humanization Is Spot On: The text isn’t just “humanized”—it actually sounds natural, doesn’t mess up the original meaning, and passes detectors 97% of the time. I’ve tried it with my own essays, and it’s never done me wrong so far.
- #2 Credits NEVER Disappear: It’s such a relief—once you buy credits, you keep them. No time limits. No random expiration. That means you only pay again when you actually need more. Simple as that.
- #3 Real Customer Support That Cares: These folks actually answer you, usually within a few hours. It’s a small team, and from my experience, you’re talking with a real human, not some useless robot who dodges your questions.
- #4 All Tools In One Place: AIDetectPlus isn’t just an AI checker. You get a top-notch AI humanizer (obviously), but also a killer plagiarism remover, PDF chat, paraphraser, and an undetectable essay writer. Plus, if you’re a student, professor, or marketer, there’s a version just for you. Just pick what you need from the menu above.
That’s all I’ve got! Hope this helped you figure out which AI humanizer is actually worth your time and money. If you want to see for yourself, go check out AIDetectPlus or just jump in with their free 1000-word trial. No credit card. No phone number. Just your email—and you’re good to go!