By - Best overallUndetectable AIBuilt-in multi-detector check, 8 writing modes, $5/mo on annualSee current pricing
- Best valueWalter Writes200,000 words for $26/mo billed yearly, the most words per dollar hereCheck plans
- Best free tierStealthWriter10 humanizations a day free, 1,000 words eachTry the free plan
- Best for volumePhraslyUnlimited humanizations, $10.99/mo annual, $2 trialLook at the trial
- Skip for nowHIX BypassNo clear free tier, 3,000-word input cap, pricing that does not add upWhy we skip it
How the seven compare
Prices below are what the vendor pricing pages showed on October 6, 2026. Humanizers change prices more often than almost any other software category we track, so if a figure looks off, the pricing page wins. Where a plan is sold as a daily request cap rather than a monthly word pool, we say so, because that difference matters more than the headline price.
| Tool | Best for | Cheapest paid plan | Words or requests | Free tier | Built-in detector | API |
|---|---|---|---|---|---|---|
| Undetectable AIVisit site | Most people | $9.99/mo, or $5/mo annual | 10,000 words/mo | 250 words | Yes, multi-detector | Yes |
| Walter WritesSee pricing | Value, volume | $8/mo billed yearly ($96 upfront) | 30,000 words/mo, 750 per request | 300 words, once | Yes | MCP server |
| StealthWriterCheck it out | Free testing, students | $20/mo | 50 requests/day, 5,000 words each | 10 requests/day | Yes | No |
| PhraslyOpen site | Heavy users | $10.99/mo annual | Unlimited, 5,000 words per run | $2 three-day trial | Yes (separate, free) | Business API |
| WriteHumanView plans | Short pieces, variations | $20/mo, or $12/mo annual | 80 requests/mo, 600 words each | 3 requests/mo | Yes | API + MCP (Pro+) |
| HIX BypassWhy we skip it | Not recommended | $14.99/mo, or $9.99/mo annual | 5,000 words/mo | Trial, size unstated | Yes | Yes |
| QuillBot HumanizerSee details | People already on QuillBot | About $8.33/mo annual | Part of Premium suite | 100 words | Yes (separate tool) | No |
What we weighed, and what we ignored
We did not run a secret benchmark and then declare a winner by one percentage point. Detector scores on humanized text swing between runs of the same paragraph, which makes a single pass-rate number close to meaningless. Instead we weighted five things, in this order.
Editor's note, October 6, 2026. We re-checked every price on this page this morning. Undetectable AI's annual Starter is still $5 a month, HIX Bypass still shows no free tier on its pricing page, and Phrasly's monthly price is still not shown on its pricing page. If any of those change, this note will.
What you actually get for the money. We read every pricing page, converted daily caps to realistic monthly output, and noted where "unlimited" has a per-run ceiling. Output quality. We looked at whether a tool preserves formatting, headings and links, and how much editing reviewers report needing afterwards. Independent detector results. We used published tests from detector vendors (who have an incentive to say humanizers fail) and from neutral reviewers (who often find the opposite), and we tell you who ran each test. Billing behaviour. Trustpilot complaint patterns around trials, renewals and cancellation. Honesty of the marketing. Several of these companies now ban their own affiliates from calling the product a detector bypass. We think that tells you something.
One thing to know before you buy anything: Grammarly, now trading as Superhuman, acquired GPTZero in June 2026 and also sells its own AI humanizer. The company that owns the most-used detector also sells a tool to get past detectors. Draw your own conclusions about how stable this cat-and-mouse game is.
The best AI humanizers
01Undetectable AI
Undetectable AI is the tool most people have already heard of, and for once the popularity is earned by the product rather than the ads. Its single useful trick is the one its competitors mostly lack: after it rewrites your text, it shows a row of detector verdicts on the same screen, so you can see whether the rewrite moved the needle before you copy anything out. Eight writing presets (University, Journalist, Marketing and so on) change the register more than you would expect, and the Journalist mode in particular produces the least awkward sentences of anything we have read from this category.
The weaknesses are real. It strips all formatting, so bold, headings, bullets and links come out as plain paragraphs and you rebuild them by hand. Independent reviewers measured a readability drop of about four Flesch-Kincaid points and budgeted 10 to 15 minutes of clean-up per thousand words. And when Originality.ai tested the output in August 2026, their detector still scored it 100 percent AI before and after, while GPTZero moved from 100 to 91. Those are competitor-run tests, so take them with salt, but a third-party test that showed Turnitin dropping from 97 to 9 percent also produced three different scores on three runs of the same essay. That inconsistency is the honest story about every tool on this page.
Trustpilot sits at 3.5 out of 5 from nearly a thousand reviews, split almost evenly between five-star and one-star. The one-stars are mostly about billing: trial charges, confusion between monthly and annual, and cancellation by email rather than a button. The five-stars often praise the support team for fixing exactly those billing problems quickly. Decide which of those two facts matters more to you.
Earns its price
- Detector panel on the output screen saves a round trip
- Cheapest credible annual price in the group at $5 a month
- Writing modes change tone, not just word order
- API and bulk options for agencies
Costs you time
- Formatting is destroyed on every pass
- 250-word free trial is too small to judge anything
- Cancellation requires emailing support
- Vendor detectors still flag much of the output
02Walter Writes
Walter Writes wins the arithmetic. Eight dollars a month buys 30,000 words, thirteen buys 70,000 and twenty-six buys 200,000, though those are yearly prices charged upfront ($96 for the entry plan). Undetectable AI charges more than that for 50,000. If you run a content shop, a newsletter, or you are rewriting a backlog of product descriptions, the per-word price here is in a different league from everything else on the list, and the output quality is close enough to the leaders that the gap does not justify paying three times as much.
The catches are the per-request caps, which start at 750 words on the Starter plan and only reach 2,000 on Elite, so long articles get processed in chunks. Every plan now includes a built-in AI detector, but it is the vendor scoring its own output, so you will still want a second opinion from GPTZero or Originality.ai. The free tier is 300 words, once. And the affiliate terms, which are public, forbid paid ads and brand bidding and require FTC disclosure, which we mention because it is a mildly good sign about how the company thinks about its own marketing. One more thing worth knowing: it exposes an MCP server, so if you work inside Claude or a similar assistant you can call it from there instead of copying and pasting.
Earns its price
- By far the most words per dollar in this comparison
- Teams plan with 10 seats at $99
- MCP server for assistant workflows
- Clean, uncluttered editor
Costs you time
- Headline prices assume a year paid upfront
- 750-word request cap on the cheapest plan
- Free tier is 300 words, once
- Smaller company, shorter track record
03StealthWriter
If you want to find out whether humanizers work for your writing before paying anyone, start here. StealthWriter's free plan gives you ten humanizations and ten detector scans a day at up to a thousand words each, which is more free capacity than any competitor offers and enough to run a real experiment over a week. The interface shows sentence-by-sentence alternatives so you can swap individual lines you dislike, which is a better editing model than the one-shot rewrite everyone else uses.
Paid plans are where it gets awkward. StealthWriter sells daily request caps, not monthly words: 50 runs a day for $20, 150 for $50, up to 2,000 a day for $400. For most writers 50 a day is far more than they will use, so the entry plan is effectively paying $20 for an uncapped experience, which is fine, but it is not cheaper than Undetectable AI and there is no API. The affiliate terms ban marketing the tool as "undetectable" or a "detector bypass", and the company's own model names (Ghost 5.2) suggest a team that iterates. A reviewer at itechguides gave it 5.6 out of 10, mostly for pricing structure rather than output.
Bottom line. The free plan is the reason to open an account and the daily-cap pricing is the reason most people will not upgrade. If you edit sentence by sentence, nothing else here works the way you do. If you want an API, look elsewhere.
04Phrasly
Phrasly's pitch is unlimited humanizations for about eleven dollars a month, and for anyone who processes a lot of text that is a genuinely good deal, with one asterisk: the price we could find is the annual one, and the monthly figure was not shown on the pricing page when we checked. The two-dollar three-day trial is a smart way to test the output on your own material, as long as you set a reminder, because trial-to-subscription conversions are the most common complaint across this whole category.
The output is competent and the "Ultra" model is noticeably better than the default at keeping meaning intact. There is a free, separate AI detector that claims 99.8 percent accuracy, but that is the vendor grading itself, so verify elsewhere. Teams with volume can use the Business API: $100 a month including $100 of credit, at $0.14 per 1,000 humanized words. Phrasly's own blog ranks itself first in its humanizer comparison, which is normal for vendor content, but it also lists a competitor as "best to skip", which is unusually candid and the reason we trust its pricing table more than most.
Earns its price
- Unlimited runs at a low annual price
- Cheap trial to test on your own text
- Bundled plagiarism check (100K words/mo)
- Solid meaning preservation on the Ultra model
Costs you time
- Monthly price not clearly shown
- Its detector's 99.8% claim is unverified
- Trial auto-converts, so diarise it
- Content generator is filler
05WriteHuman
WriteHuman is the one to pick if your work comes in short pieces: social captions, meta descriptions, email openers, abstracts. Each run returns multiple variations (two on Basic, five on Ultra) so you choose rather than re-roll, and the tool includes both a text detector and an image detector, which no one else in this group offers. The Pro and Ultra plans expose MCP access, so it slots into assistant workflows like Walter Writes does.
It is a poor fit for long-form. The Basic plan caps each request at 600 words and gives you 80 of them a month, so a 3,000-word article is five requests and a chunk of your allowance. The free plan is three requests a month at 250 words, which is a demo, not a tier. At $12 a month on annual billing it is priced fairly for what it does; just be clear about what it does.
Bottom line. Right for captions, abstracts and anything under six hundred words; wrong for articles. Pay the annual price or do not bother, and ignore the free tier, it is three requests.
06HIX Bypass
HIX Bypass is our skip. Not because the output is bad, it is roughly in line with the pack, but because the offer makes no sense from the buyer's side. There is no free tier on the pricing page, and the only trial is a line in the homepage FAQ that never says how big it is, so you will likely pay before you see much. The Standard plan gives you 5,000 words a month for the price Undetectable AI charges for 10,000. And the Unlimited plan is listed at $59.99 monthly but $15 a month on yearly billing, a four-to-one gap that either means the monthly price is a decoy or the yearly one has conditions we could not find. The marketing copy about a proprietary model with "trillions of parameters" did not help our confidence.
If HIX spells out its trial and fixes the pricing page we will revisit it. Until then, every other tool above gives you a way to test before you pay.
Earns its price
- API available
- 50+ languages claimed
- Output quality is average, not poor
Costs you time
- Trial mentioned, size never stated
- Worst words-per-dollar on the entry plan
- Monthly vs yearly pricing gap is unexplained
- Marketing claims we could not verify
Read our full HIX Bypass review.
07QuillBot Humanizer
QuillBot's humanizer is one tool inside a large writing suite, and that is the right way to think about it. If you already pay for QuillBot Premium for paraphrasing, grammar, translation and the Word add-in, the humanizer is a free bonus and a decent one. If you are buying specifically to humanize, it is the wrong purchase: the free cap is 100 words, the rewrite is less aggressive than the dedicated tools, and QuillBot also sells an AI detector, which puts it in the same awkward position as Grammarly. The affiliate program runs through PartnerStack at 10 to 20 percent, which we mention for transparency since we link to it.
If you already pay for QuillBot, you already own a humanizer. If you do not, this is not the reason to start.Our one-line take on QuillBot's humanizer
Humanizer vs paraphraser vs just editing it yourself
A paraphraser (QuillBot's main product, Grammarly's rewrite) changes wording while keeping structure. A humanizer changes the statistical fingerprint: sentence length variance, word frequency, the predictability that detectors measure as perplexity and burstiness. That is why humanizer output often reads slightly off: the tool is optimising for a detector, not a reader. Editing by hand does both jobs better and costs nothing but time. For a 600-word piece, ten minutes of real editing beats every tool here. For 60,000 words a month, it does not, and that is the honest case for paying.
What the detector companies found, and why it conflicts with everyone else
There are two kinds of humanizer tests on the internet and they disagree completely. Detector vendors (Originality.ai, GPTZero, Winston) run humanized text through their own product and publish the result, which is usually that they caught it. Independent reviewers run the same thing through Turnitin or a panel of detectors and often find the score collapses. Both are telling the truth about their own test. The reconciliation is that detectors are tuned differently, text length changes everything (short text is far harder to classify), and a humanizer that beats Turnitin today may not beat it next month. Scribbr's published comparison found premium detectors at 84 percent accuracy and free ones at 68 percent on ordinary AI text, before any humanizing. Nothing about this market is stable enough to promise a result.
The policy problem nobody puts on the pricing page
If you are a student, your institution's policy almost certainly treats submitting generated work as misconduct regardless of what a detector says, and several universities have switched detectors off precisely because of false positives against non-native English writers (a 2023 study in Patterns found 61 percent of non-native essays were wrongly flagged). If you are a marketer or a business owner rewriting your own AI-assisted drafts, none of that applies, and a humanizer is an editing tool. We think the second group is the real market for these products, which is why we rank on value and quality rather than on who "beats Turnitin" this week.
Which one, for whom
Pick Undetectable AI if you want one tool with a detector panel and the lowest credible annual price. Pick Walter Writes if volume is the problem and you can pay a year upfront. Pick StealthWriter if you want to try before paying and like editing sentence by sentence. Pick Phrasly if you process more than 50,000 words a month and the per-run cap does not bother you. Pick WriteHuman for short-form work. Skip HIX Bypass until its trial is spelled out. And if you already pay for QuillBot, just use what you have.
Questions readers keep asking
Which humanizer should I actually buy?
Undetectable AI on the annual plan if you want one tool with a detector panel. Walter Writes if you process real volume. StealthWriter if you want to test for free first.
Do these tools really beat detectors?
Some detectors, some days. Vendor tests in 2026 still flagged the big names; an independent Turnitin test showed a collapse, then gave three different scores on three runs. Nobody can promise a result.
Best free option?
StealthWriter: ten runs a day, a thousand words each. Everything else free is a demo.
Is this cheating?
For a generated essay submitted as your own, your school's policy almost certainly says yes, detector or not. For your own AI-assisted marketing drafts, it is an editor.
Why does the output read worse?
Because the tool is optimising for a classifier, not a reader. Expect flattened tone, lost formatting and ten to fifteen minutes of fixing per thousand words.
What should it cost?
Five to twenty dollars a month on annual billing. Monthly roughly doubles that. Over thirty a month is agency territory.
Where this leaves you
Undetectable AI remains the default recommendation, less because its rewrites are magically better and more because it shows you the detector verdicts without leaving the page and costs five dollars a month if you commit for a year. Walter Writes is the tool we would actually buy for a content business. Everything else is a specific fit for a specific workflow, and HIX Bypass is a pass until it says what its trial includes. Whatever you choose, budget editing time: no tool on this page produces finished copy.