Hue Write vs. Undetectable AI: which AI humanizer is better in 2026?

Undetectable AI is one of the best-known names in AI humanizers. It launched in 2023, says it has more than 20 million users and has grown into a suite of writing and detection tools. Hue Write, formerly Lucid Writer, is a younger, single-purpose humanizer that competes mostly on price, writing quality and privacy.

Both promise the same thing: paste in stiff or AI-assisted text and get back writing that reads as if a person wrote it. We ran both through the same samples and detectors, then compared everything you’d want to know before paying: price, free access, refunds, privacy and the tools around the humanizer.

At a glance

Prices and policies as published by each company on October 26, 2026.

How we compared them

We ran both tools through the same hands-on test on October 20, 2026, and checked their published terms on October 26.

The samples. We used five texts of about 500 words, each written by an AI chatbot:

1. An argumentative college essay (ChatGPT)
2. The discussion section of a lab report, with figures and an APA citation (Claude)
3. A professional email (Gemini)
4. A blog post (ChatGPT)
5. A Spanish-language opinion piece (Gemini)

They’re the same samples we used in our Hue Write review, so the results line up across our humanizer coverage.

The settings. We paid for each tool’s mid-priced monthly plan: Hue Write Pro ($19.99) and Undetectable AI’s 20,000-word plan ($19). For each sample we chose the settings that matched it:

• Hue Write: Academic mode for the essay and lab report, Professional for the email and Casual for the blog post.
• Undetectable AI: its top Undetectable mode at University readability, with the matching purpose (Essay, Report, Business Material or Article) and Balanced strength.

Some samples got one retry in each tool’s strongest setting: Ultra Mode for Hue Write, More Human strength for Undetectable AI. Where we retried a sample, we report the retry’s results.

The detectors. We used seven: GPTZero, Originality.ai, Copyleaks, ZeroGPT, Winston AI, QuillBot’s AI detector and Pangram, a newer detector that several humanizer companies now name in their marketing.

• Pass threshold: a check counts as a pass if the detector labels the text human-written or rates it less than 20% likely to be AI.
• Checks per tool: 35 (five samples, seven detectors).
• Turnitin: not included. It’s sold only to schools, and its AI checker isn’t open to the public.

Quality. Two editors read each pair of outputs blind, without knowing which tool produced which, and rated how well each kept the original meaning, from 1 to 5. We also:

• noted every new problem each tool introduced, from grammar errors to awkward wording,
• checked that every number, name and citation survived,
• measured Flesch Reading Ease, where a higher score means easier to read.

The rounds. We compare the two tools in nine rounds. The first two are tested. The other seven come from each company’s published prices, terms and policies, and from public ratings.

How we pick a winner. A humanizer’s main job is getting text past AI detectors, so the detector round decides the verdict: the tool that passes more of the 35 checks wins. Two safeguards apply:

• Meaning comes first. A tool whose rewrites average below 3.5 out of 5 on our blind meaning check can’t win on detector results, because text that passes a detector by losing your argument isn’t usable.
• Close calls go to quality. If the two tools finish within two checks of each other, the writing-quality round decides.

The other rounds don’t change the winner, but they show who might prefer the runner-up.

Round 1: AI detector results (decides the verdict)

Winner: Hue Write

Before humanizing, all 35 checks flagged our samples as AI-written. Hue Write passed 26 of the 35 checks (74%), and Undetectable AI passed 13 (37%). Hue Write passed 26 of the 28 checks on the four English samples, missing only Originality.ai and Pangram on the lab report. Undetectable AI did well with the email and the essay, but it got the lab report and the blog post past only one detector each, and nothing past Pangram. Neither tool got our Spanish sample past a single detector, even after a retry. Hue Write needed a retry on one sample, the Spanish piece. Undetectable AI needed two: the lab report and the Spanish piece.

Both companies make big claims:

• Hue Write advertises a “99%+” pass rate and shows the logos of 14 detectors it says it passes.
• Undetectable AI says its top mode “bypasses 99+% of detectors.” Its pricing page promises to refund the cost of any humanization that gets flagged, though its terms set narrower conditions (see Round 6).

What outside tests have found. One outside test covers both tools:

• Andy Stapleton (April 2026). In a YouTube test of paid humanizers, the YouTuber, who covers academic research, ranked Hue Write first and Undetectable AI’s Stealth mode second. He reported that Turnitin scored both 0% AI, but Originality.ai’s Turbo model was 81% confident Hue Write’s text was original, against only 59% for Undetectable AI’s. He said Undetectable AI’s free Basic mode was “100% detected.” He gave one score per tool on each detector and didn’t say how many texts he tested or how he ran Turnitin, which is sold only to schools. His video description has tracked links to Undetectable AI and to Phrasly, a rival humanizer, but not to Hue Write.

The other published tests of Undetectable AI come from detector companies, which have an interest in showing that humanizers fail:

• GPTZero (February 2026). A research paper by GPTZero staff tested 1,000 texts from nine humanizer services. It rated Undetectable AI the only one with “High” ability to beat simpler detectors, but reported that GPTZero itself caught 93.5% of all the humanized texts in its dataset.
• Originality.ai (August 2026). A single-sample review found Originality.ai still scored Undetectable AI’s output 100% AI.

Treat every result, ours included, as a snapshot. Detectors retrain often. Turnitin added detection of “AI bypasser” tools for English text in August 2025.

Round 2: Writing quality and meaning

Winner: Hue Write

Both editors rated Hue Write’s rewrites 4 or 5 on every sample. It changed the shape of a sentence without losing its point, turning “Biodiversity helps ecosystems remain stable by supporting interactions among species” into “By allowing species to interact in different ways, biodiversity helps ecosystems stay stable.” Undetectable AI kept the meaning too but often read stiffer: in the lab report, “The samples were heated for ten minutes before their mass was recorded” became “Before recording the mass of the samples, they underwent heating for a period of ten minutes.” Its More Human retries also changed a citation’s punctuation and made the Spanish less idiomatic. Hue Write’s slips were minor: a small wording change in the lab report and an agreement error in the Spanish.

Fooling a detector is only half the job. A humanizer that scrambles your argument, invents a claim or mangles a citation leaves you worse off than you started. That’s why a tool whose rewrites lose the meaning can’t win on detector results alone.

What outside reviewers have found. In a January 2025 paper, Pangram Labs, which makes a competing detector, rated 19 humanizers by hand for fluency and faithfulness. It placed Undetectable AI in its lowest tier: “Poorly written text at an elementary school level. Introduces typos.”

That test is almost two years old, and Undetectable AI has released new models since. Its API now lists three engines, v2, v11 and v11sr, the last described as offering the “best humanization.” We found no outside assessment of Hue Write’s writing quality.

Round 3: Settings and languages

Winner: tie

Undetectable AI gives you finer control. You choose from four kinds of setting:

• Mode: Basic, Stealth or Undetectable.
• Readability level: High School, University, Doctorate, Journalist or Marketing.
• Purpose: nine options, from Essay and Cover Letter to Legal Material.
• Strength: More Readable, Balanced or More Human.

The company recommends More Human “for overly aggressive or inconsistent AI detectors.” It’s a lot of dials, and useful ones if you write for different readers.

Hue Write keeps it simpler. You pick one of seven writing modes: Auto, Academic, Professional, Friendly, Formal, Casual or Creative. On Pro and Max, an Ultra Mode tackles stubborn text and, according to the company, keeps formatting, code and math intact. Its standard model is Hue 4, and a Hue 4.5 model is in beta. One catch: the $5.99 Basic plan offers only three tones.

Languages are where Hue Write pulls level. It says it supports more than 100 languages. Undetectable AI lists 55 and says English is its main focus, with “secondary” support for the rest. If you write in English and want control, Undetectable AI has the edge. If you write in other languages, Hue Write does. One caution from our test: neither tool got the Spanish sample past a single detector.

Round 4: Price and value

Winner: Hue Write

Billed monthly, Hue Write costs less at every comparable level.

Both advertise 50% off for paying yearly, so the gap stays about the same on annual plans. On a yearly plan, Undetectable AI’s 20,000-word tier works out to $9.50 a month.

Undetectable AI’s offsetting perk: a refund of word credits when your output gets flagged. Its pricing page also offers bigger plans on a slider, up to 380,000 words a month.

Hue Write’s offsetting perk: free rehumanizations, meaning re-runs of the same text that don’t use more words. You get one per task on Basic, two on Pro and three on Max.

The catches on each side:

• Hue Write: Basic caps each request at 600 words, so a long essay needs splitting. Monthly words don’t roll over.
• Undetectable AI: its pricing page code contains several price tables and testing markers, so the prices you see may differ from ours. Check the total at checkout.

Round 5: Free plan and trial

Winner: Undetectable AI

Undetectable AI lets you try more before you pay:

• Free humanizing: 250 words.
• Free tools: its AI detector, with no sign-up and a 10,000-word box, and its paraphraser.
• A trial: its checkout offers three days free on yearly plans.

That trial is worth reading carefully. “No charge today” becomes a full yearly charge unless you cancel before it ends, and for most subscribers cancelling means sending an email.

Hue Write lets you sign up free without a card, but its pricing page doesn’t say how many words that gets you. A company confident in its output should publish that number.

Round 6: Refunds and cancelling

Winner: Hue Write

Hue Write. According to its terms:

• New subscriptions: refundable if you ask within 7 days and have used only a limited share of the credits.
• Renewals: refundable within 30 days if you haven’t meaningfully used the renewed plan.
• Fees: payment processing fees are deducted from any refund.
• Cancelling: in your account settings. The plan runs to the end of the period you’ve paid for.

Undetectable AI. Its terms say “refunds will not be provided unless required by law.” The exception is word credits: you can ask for them back within 30 days if a humanized text “provably flags as less than 75% human on a reputable AI detector.” Its marketing goes further. The humanizer page says “no questions asked,” so rely on the terms.

To cancel, most subscribers have to email the company. Only residents of California and New York can cancel in the dashboard, and a chargeback doesn’t count as cancelling.

Billing is the most common complaint on Undetectable AI’s Trustpilot page. Of the 20 most recent one-star reviews when we checked, about 15 described unexpected or renewal charges. The positive reviews often praise fast support and refunds, so problems do get resolved. But the process puts the work on you.

Round 7: Privacy

Winner: Hue Write

Students often paste unpublished essays into these tools, so we read the fine print.

Hue Write’s privacy policy, updated in October 2026, is direct:

• No training: “We do not use the text you submit, or the output produced from it, to train, fine-tune, or otherwise develop AI models.”
• No reuse by vendors: the AI providers that process your text aren’t allowed to use it for their own purposes.
• Deletion: saved history stays until you delete it, and deleting your account removes it, apart from backups kept for up to 30 days.
• Certifications: it displays SOC 2, PCI DSS and GDPR badges. We didn’t review its audit reports.

Undetectable AI is less clear. Its AI detector page says text is “never stored or used to train models.” Its privacy policy, though, was last updated in March 2023:

• Training: the policy doesn’t mention it at all.
• Retention: data is kept “as long as necessary.”
• Server location: the sentence about it is unfinished: “Our servers are located in.”
• Document history: the humanizer keeps one in your account. You can delete it, but it sits awkwardly with “never stored.”
• Certifications: we found none.

The company’s About page says its own model is trained on writing from people who consented. That’s reassuring, but it belongs in the policy.

Round 8: Extra tools and apps

Winner: Undetectable AI

If you want one subscription for everything, Undetectable AI is far ahead.

• Writing tools: an AI essay writer, a “stealth” writer, a paraphraser, a plagiarism checker, an SEO writer and a watermark remover.
• Detectors: a free AI text detector, plus detectors for AI images, video and deepfakes.
• Chrome extension: 20,000 users and a 4.7-star rating from 40 ratings.
• For developers: an API from $29 a month and a Zapier integration.

The built-in detector is convenient, but it’s an estimate of what other detectors might say, not a guarantee. The company says it “cannot publicly name” the models behind it.

Hue Write is a humanizer and little else. Pro and Max add a Chrome extension that rewrites text inside other websites’ text boxes, and Max adds an API. The extension is young: when we checked in October, it had fewer than 1,000 users and three ratings. You’ll need a separate AI detector to check your work.

Round 9: Track record

Winner: Undetectable AI

Undetectable AI has been on the market since 2023 and has a large public record. Its user-count claims vary across its own pages, from 8 million to 24 million. It has more than 1,000 Trustpilot reviews, averaging 3.5, and a popular browser extension. That record is mixed, but it exists.

Hue Write has no Trustpilot profile, a new extension and only its own claim of 50,000-plus users. That doesn’t mean it’s worse, but there’s less outside evidence to judge it by. Our full review has more detail.

The scorecard

Who should choose Undetectable AI

• You want a toolkit, not just a humanizer. A detector, a paraphraser, an essay writer and a plagiarism checker under one login is good value if you’ll use them.
• You like fine control. Readability level, purpose and strength let you tune each piece to its reader.
• You’d use the flagged-output guarantee. Getting word credits back for flagged text is unusual, even with conditions attached.
• You’ll manage your billing. Note your renewal date, and cancel by email well before any trial ends.

Who should choose Hue Write

• Getting past detectors is your priority. It passed 26 of our 35 checks, against Undetectable AI’s 13.
• You’re watching costs. It’s about half the price per word on comparable plans, and $5.99 is a low price for occasional use.
• You paste unpublished work. It puts a no-training commitment in its privacy policy, not just on a product page.
• You write in more than one language. It claims 100-plus languages, against Undetectable AI’s 55, though neither got our Spanish sample past a detector.
• You want an easy exit. You cancel in your account, and new plans have a 7-day refund window.

Using either one responsibly

Both companies leave the rules to you, though they say so differently:

• Hue Write’s terms make you responsible for following any honor code that applies to you.
• Undetectable AI’s ethics page calls cheating in school an unacceptable use and says its moderation team looks into sign-ups from .edu email addresses. Its humanizer page, meanwhile, answers “Can I use the AI Humanizer for academic purposes?” with “Absolutely!”

Whichever you use:

• Check the AI policy for each course and assignment. Our guide to using AI chatbots to study explains what’s usually allowed.
• Disclose AI help where your instructor asks for it.
• Keep your drafts and version history. Detectors misfire on human writing too: a Stanford study found popular detectors flagged more than half of a set of essays by non-native English speakers as AI-generated. Your drafts are your best evidence if that happens to you.

The verdict

Hue Write wins, mainly on detector results. It passed 26 of 35 detector checks to Undetectable AI’s 13 and finished ahead on six of the seven detectors, tying on ZeroGPT. On Pangram, it passed 3 of 5 samples and Undetectable AI none. Its rewrites also kept the meaning better, averaging 4.4 out of 5 to Undetectable AI’s 3.9.

Away from the tests, it costs about half as much per word, it commits in writing not to train on your text, and leaving is as easy as joining.

Undetectable AI is the better toolkit. If you want a detector, a paraphraser and an essay writer under one login, or you like to tune readability and purpose for every piece, it gives you more. Read its refund terms before you subscribe, and set a reminder before any trial ends.

More humanizer head-to-heads: WriteHuman vs. Hue Write · Walter Writes vs. Hue Write · Walter Writes vs. Undetectable AI · WriteHuman vs. Undetectable AI