Docs checked
Jenni AI
Academic writing editor with autocomplete, citation insertion, PDF chat and AI-edit suggestions.
Academic & Student Tools from USD 12.00
Which AI humanizers pass AI detectors?
We run AI humanizers against GPTZero, Originality.ai, Copyleaks, Winston AI, Sapling, ZeroGPT, then publish dated results, pricing, privacy notes and meaning-preservation checks. Before and after scores, the date of the test, and the tools that failed - not a list of vendor claims.
Last updated: · 0 added this week · 87 with a sourced price
The detector panel
Full results →Six detectors, the same three test texts for every tool, one date per run. A detector counts as passed at or below 35% AI probability.
No results published yet
Every row in that table has to come from someone running three fixed test texts through a humanizer and then through six detectors, and writing down what happened. None of those runs is published yet, so the table is empty.
Filling it with the "99.8% undetectable" figures vendors print would make this page look finished and make it worthless. Those claims are listed on each detector's page, labelled as claims. The method is published in full, and it is the same whether we run it or you do: the test procedure.
What a claim on this site is worth
How we test → Listed
Recorded from public sources
The tool exists and we wrote down what it says about itself. Nothing more is claimed.
19 listings
Established
Beyond doubt in the market
Widely used and widely written about. Not tested by us.
10 listings
Docs checked
Price read at the source
We read the vendor's own pages and recorded price and limits with a link and a date. No detector result.
87 listings
✓ Tested
Run through the panel
Three fixed texts, six detectors, before and after, published with the date.
0 listings
Price checked at the source
All tools →One per category, walking round the list. These are the entries where we opened the vendor's own pricing page, wrote down what it said and kept the link.
Docs checked
AI Bypass
Weekly-billed AI bypass tool powered by StealthGPT that rewrites AI output into text detectors do not flag.
AI Detector Bypassers from USD 3.99
Docs checked Free
Ahrefs AI Content Detector
Free no-signup AI content detector for short text, part of Ahrefs' free SEO writing tools.
AI Detectors from USD 0.00
Docs checked
AI Humanizer
Rewrites text from ChatGPT, Claude and Gemini into human-style writing with a built-in detector.
AI Humanizers from USD 7.00
Docs checked API
Copyleaks API
Content-integrity API for AI detection and plagiarism scanning, billed in unified credits per scan.
Humanizer APIs from USD 13.99
Docs checked API
AI Undetect
Rewrites AI-generated content into human-style text and includes an AI detector.
Multilingual Humanizers from USD 5.00
Categories
All categories →AI Humanizers
Rewrite AI text so it reads as human
18 tools
AI Detector Bypassers
Built specifically to defeat detectors
13 tools
AI Detectors
Decide whether text was machine-written
22 tools
Paraphrasers & Rewriters
Reword text, detectors not the point
12 tools
Plagiarism & Originality Checkers
Match text against sources
10 tools
Detection Suites for Institutions
Sold to schools and universities
6 tools
Humanizer APIs
Documented endpoints, per-word pricing
8 tools
Academic & Student Tools
Marketed at coursework and theses
6 tools
SEO & Marketing Content
Humanizing at publishing volume
7 tools
Multilingual Humanizers
Beyond English
5 tools
Writing Assistants with a Humanize Mode
General writing tools with a humanize feature
9 tools
Common questions, as filters
The questions people actually arrive with. Each page states its criterion, and says plainly when no listing meets it yet.
AI humanizers you can use without an account
Tools whose core function worked without an account and without payment details when we checked.
Tools with a documented API
Humanizers and detectors you can call from your own product, with published endpoints.
Tools with a published retention answer
Tools where we checked, with a source and a date, what happens to the text you paste in.
Multilingual AI humanizers
Tools that state support for languages beyond English.
Tools with a browser extension
Tools that work inside the editor you already use, rather than in their own tab.
Tools with a free tier worth using
Tools whose free allowance is large enough to judge the output, not just to see a teaser.
Tools we ran through the detector panel ourselves
Listings where we have run the same fixed test texts through the tool and through six detectors, on a stated date.
Free, and detectors
All free tools → Docs checked
Jenni AI
Academic writing editor with autocomplete, citation insertion, PDF chat and AI-edit suggestions.
Academic & Student Tools from USD 12.00
Docs checked
Textero AI
Academic writing assistant with essay drafting, AI detection and grading tools, metered in AI credits.
Academic & Student Tools from USD 8.25
Docs checked API
GPTHuman AI
AI humanizer with per-output word caps, watermark removal for ChatGPT and Claude, and a humanizer API.
AI Detector Bypassers from USD 8.25
Docs checked
GPTinf
Humanizes AI text and bundles an AI detector, paraphraser, plagiarism and grammar checkers.
AI Detector Bypassers from USD 4.99
Docs checked API
HIX Bypass
Rewrites AI text in Fast, Aggressive or Latest mode and scores it with a bundled AI detector.
AI Detector Bypassers from USD 14.99
Docs checked
Netus AI
AI Bypasser that rewrites AI text, plus paraphraser, summarizer and unlimited AI detection.
AI Detector Bypassers from USD 14.00
The other side: detectors
All detectors → Docs checked Free
Ahrefs AI Content Detector
Free no-signup AI content detector for short text, part of Ahrefs' free SEO writing tools.
AI Detectors from USD 0.00
Docs checked API
Copyleaks AI Content Detector
Enterprise AI and plagiarism detection in one report, with LMS integrations and 30+ language support.
AI Detectors from USD 13.99
Docs checked Free
Crossplag AI Content Detector
Free English-only AI content detector offered alongside Crossplag's cross-language plagiarism checker.
AI Detectors from USD 0.00
Docs checked
Decopy AI Detector
Free no-login AI detector handling up to 200,000 characters with shareable online or PDF reports.
AI Detectors from USD 9.99
Docs checked API
Detecting-AI
Free AI detector taking 15,000 characters per scan without signup, plus detector and humanizer APIs.
AI Detectors from USD 7.00
Docs checked
Grammarly AI Detector
Free AI detector from Grammarly returning a percentage AI score, with a Pro agent for flagged phrases.
AI Detectors from USD 12.00
Looking for an alternative?
Best lists → Undetectable AI alternativesQuillBot alternativesStealthGPT alternativesGPTZero alternativesOriginality.ai alternativesTurnitin alternativesHumbot alternativesCopyleaks alternativesWriteHuman alternatives Free AI humanizers that pass AI detectorsThe best free AI humanizersThe best AI detectorsThe best humanizer and detector APIsThe best AI humanizers for SEO contentThe best paraphrasing toolsThe best plagiarism checkersIntegrity platforms for schools and universities
Newly added
All new entries → Docs checked
Jenni AI
Academic writing editor with autocomplete, citation insertion, PDF chat and AI-edit suggestions.
Academic & Student Tools from USD 12.00
Listed
PaperTyper
Free student toolset with grammar checking, plagiarism checking and MLA/APA/Chicago citation generation.
Academic & Student Tools Freemium
Docs checked API
Phrasly
Humanizes AI text and bundles an AI detector, plagiarism checker and content generator.
Academic & Student Tools from USD 10.99
Listed
Samwell AI
Academic drafting tool that generates cited papers, checks plagiarism and offers a humanization feature.
Academic & Student Tools Freemium
Docs checked
Textero AI
Academic writing assistant with essay drafting, AI detection and grading tools, metered in AI credits.
Academic & Student Tools from USD 8.25
Docs checked
Yomu AI
Writing workspace for students offering AI editing actions, citation management and essay outlining.
Academic & Student Tools from USD 10.00
Docs checked
AI Bypass
Weekly-billed AI bypass tool powered by StealthGPT that rewrites AI output into text detectors do not flag.
AI Detector Bypassers from USD 3.99
Listed API
Bypass AI
AI detection remover with Simple, Standard and Enhanced modes plus a built-in multi-engine AI detector.
AI Detector Bypassers Freemium
Vendors: get your humanizer tested
USD 39 buys a detector-panel review: your tool against 6 detectors with the same test texts every other tool gets, published with the date and a badge you can put on your own site. USD 99 adds three days of labelled placement. A basic listing is free.
What it does not buy: the result. If your tool scores badly, the bad scores are what gets published - that is the only reason a good score here is worth anything.
Questions before you trust a number on this site
Which AI humanizer passes the most detectors?
Nobody can answer that honestly from vendor marketing, and we have not published our own measurements yet. When we have, they will be on /best/pass-ai-detectors/ with before and after numbers and a date - not a ranking somebody wrote by hand.
What does "passed" mean here?
A detector scored the humanized text at or below 35% AI probability, on the date shown, using the same three test texts we run through every tool. The raw percentages stay on the page so you can set the line somewhere else and recompute.
Why do results differ so much between detectors?
Because detectors are trained on different data and measure different things. A humanizer tuned against the most popular detector frequently does nothing to a stricter one - that gap is the single most useful thing a six-detector panel shows you.
How long does a result stay true?
Until the detector is retrained, which happens without announcement. That is why every number here carries the date it was measured and why the panel is re-run every 180 days. A result with no date is not a result.
Are AI detectors accurate?
Every detector on this site produces false positives on genuine human writing, and none of the published accuracy figures has been independently audited. We record each vendor's claim and label it as the vendor's claim. A detection result is a reason to look closer, never proof.
Can a vendor buy a better result?
No. Paying buys the test, not the outcome, and a poor result is published exactly like a good one. The sort function reads neither tier nor payment status, and a test fails the build if that ever changes.
Does passing a detector mean I am allowed to use the tool?
No. Permission comes from your institution, employer or client, not from a test result. See the note on academic integrity.
Weekly: what changed
One short round-up per week - newly reviewed tools, price changes, detectors that moved, and any tool whose result no longer holds. No sales talk.
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