AI Detector Hub

AI Detector Hub

Compare AI detectors and humanizers. Find the right tool, skip the guessing.

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AI Detectors

Tools that scan text and estimate how likely it was written by an AI model. Used by educators, publishers, and SEO teams.

18 tools

AI Humanizers

Tools that rewrite AI-generated drafts to read more naturally and lower the chance of triggering a detector.

18 tools

Top tools

GPTZero

Educator-first detector with the lowest false-positive rate in independent tests.

GPTZero rose to prominence as the detector schools reached for first. It scores documents at the sentence level, so you can see exactly which lines tripped the model rather than ju...

  • Sentence-level highlighting
  • Lowest false-positive rate
  • LMS integrations

Originality.ai

The publisher's choice, strongest on paraphrased and edited AI text.

Originality.ai is built for the content pipeline rather than the classroom. It pairs AI detection with plagiarism checking and a full-site scanner, so agencies managing many domain...

  • Best on paraphrased AI
  • Built-in plagiarism check
  • Full-site scanner

Winston AI

Document, image, and OCR detection in one reporting-focused tool.

Winston AI markets itself to professionals who need defensible reports. Beyond text it can scan uploaded PDFs, Word files, and even images for AI generation, a capability few detec...

  • AI image detection
  • OCR for scanned docs
  • Branded PDF reports

Copyleaks

The multilingual specialist, covering 30+ languages.

Copyleaks differentiates on language reach. While most English-only detectors weaken on non-English text, Copyleaks holds quality across more than 30 languages and layers plagiaris...

  • 30+ languages
  • Plagiarism layer included
  • Enterprise scaling

ZeroGPT

The most-searched free detector, no signup required.

ZeroGPT is the casual first stop: paste text, get a percentage in seconds, no account needed. It has grown to tens of millions of monthly users, making it the most searched name in...

  • No signup
  • Huge user base
  • Instant results

Turnitin

The institution power, already inside most university LMS systems.

Turnitin did not set out to be an AI detector, but because schools already pay for its plagiarism platform, its AI indicator arrived inside the workflow they already use. No new to...

  • Built into LMS
  • Familiar workflow
  • Scale for whole campuses

Sapling AI

API-first detector for fast per-sentence checks inside business tools.

Sapling AI targets teams that want detection embedded in their own stack rather than a standalone site. Its detector returns per-sentence scores through an API, which makes it a fi...

  • API-first
  • Real-time scoring
  • Business integrations

Scribbr

A completely free, no-signup detector aimed at students.

Scribbr's detector is positioned squarely at students who need a trustworthy check before submission and do not want to pay. It is free, requires no account, and explains its flags...

  • Free and no signup
  • Explains its flags
  • Student-focused

Crossplag

Bulk scanning across 100+ languages for premium users.

Crossplag started in the academic integrity space and leans into volume. The free tier handles quick checks, while premium plans unlock unlimited word scanning and support for more...

  • 100+ languages
  • Unlimited bulk scanning
  • Academic roots

Content at Scale

SEO-context detector built into a content pipeline.

Content at Scale approaches detection from the publisher's chair. Its AI detector is free to use and arrives alongside a larger content-creation and optimization suite, so SEO team...

  • SEO context
  • Part of a content suite
  • Optimization tips

Hive AI

The multimodal detector: text, images, audio, and video in one API.

Hive AI is built for trust-and-safety teams that need to moderate AI-generated material across every format, not just text. Its detection API covers AI-written text, generated and ...

  • Multimodal (text + image + audio + video)
  • Free public demo
  • Enterprise API

Writer.com

A free, no-signup detector aimed at business and enterprise teams.

Writer.com's AI content detector is a free, browser-based checker that needs no account, which makes it an easy first stop for a quick scan. It is part of a larger enterprise writi...

  • Free and no signup
  • Enterprise writing platform
  • Quick ballpark scans

Undetectable AI

The category name made literal: detection-aware rewriting with reading levels.

Undetectable AI is the best-known name in humanizing, and it leans into customization. You can pick a reading level, from high school to PhD, so the rewritten draft matches the con...

  • Reading-level control
  • Built-in detector
  • Readable output

WriteHuman

Long-form humanizing with an enhanced language model.

WriteHuman focuses on longer passages, handling up to 3,000 words per request on higher plans. Its pitch is coherent, natural paragraphs rather than sentence-by-sentence shuffling,...

  • Up to 3,000 words
  • Coherent paragraphs
  • Fast processing

AISEO

Humanizing bolted onto a full SEO content suite.

AISEO is less a pure humanizer and more a content-creation Swiss army knife. Its humanize mode runs on GPT-4-class and Anthropic models, and it adds one-click blog generation, bran...

  • SEO-optimized humanizing
  • 26 languages
  • Brand-voice tools

GPTinf

Bypass-focused rewriting with a compare mode.

GPTinf takes a direct line on the core job: rewrite AI text so it slips past detectors. It uses re-paraphrasing and a compare mode that shows the before-and-after side by side, whi...

  • Compare mode
  • Reliable bypass
  • Free trial

Walter Writes AI

All-in-one humanizer that also detects.

Walter Writes AI bundles humanizing and detection in a single tool, so you can rewrite and then immediately check the result without leaving the app. It supports more than 20 langu...

  • Humanize + detect
  • 20+ languages
  • Low entry price

Phrasly.AI

Academic-leaning humanizer with a rhythm-injection engine.

Phrasly.AI is frequently recommended for academic writing because it aims to keep scholarly tone while breaking up the uniform rhythm detectors look for. Its 'rhythm-injection' eng...

  • Rhythm-injection engine
  • Academic tone
  • Free tier

QuillBot

The paraphrasing giant's familiar humanizer mode.

QuillBot already lives in many students' workflows for paraphrasing and grammar, so its humanizer feels like a natural extension rather than a new tool to learn. That familiarity l...

  • Familiar ecosystem
  • Fast
  • Grammar + paraphrase + humanize

Grammarly

The writing assistant's humanizer mode, everywhere you already type.

Grammarly's humanizer rides on top of a tool that is already in browsers, docs, and daily habits for millions of people. That convenience is the whole point: you can smooth stiff A...

  • Works where you write
  • Reduces repetition
  • Familiar interface

StealthGPT

The humanizer built to beat AI detectors on the hardest cases.

StealthGPT is one of the most-cited names among humanizers, and it leans into raw bypass performance: the pitch is output that scores as human on the major detectors, including aft...

  • Strong bypass claims
  • Chat + document modes
  • Volume plans

GLTR

A visualizer that reveals AI text by showing how predictable each word is.

GLTR takes a different angle from the percentage-generating detectors. Built by researchers at MIT and Harvard, it visualizes how predictable each word in a passage is by showing t...

  • Word-level predictability
  • Open-source
  • Teaching visual

DetectGPT

Stanford's perturbation-based method that asks whether text was generated here.

DetectGPT is a research method from Stanford that flips detection on its head. Instead of training a classifier, it asks a simple question: would this text, if generated, stay roug...

  • Perturbation-based method
  • Open-source
  • Research-grade

Netus AI

A humanizer marketed for high bypass rates at volume.

Netus AI is a humanizer that markets itself on raw bypass performance and volume. Like its competitors it rewrites AI drafts to vary rhythm and structure, but it emphasizes high by...

  • High bypass claims
  • Bulk and API modes
  • Multilingual

GPT-2 Output Detector

The original open research detector, still useful as a transparent baseline.

The GPT-2 Output Detector is the research demo that started public AI detection. Built on a RoBERTa classifier trained to separate GPT-2 samples from human text, it runs free in th...

  • Free, no signup
  • Fully open method
  • Weak on modern models

StealthWriter

A humanizer that shows you several rewrites and lets you pick the tone.

StealthWriter takes a different angle from most humanizers: instead of returning one rewrite, it produces several variants of each passage so you can choose the version that sounds...

  • Multiple rewrite variants
  • Built-in detection preview
  • Free tier to test

Humbot

A fast, cheap one-click humanizer aimed at high-volume users.

Humbot is built around speed and price rather than fine control. You paste a draft, click once, and get a rewritten version back in seconds, with plans starting in the low teens pe...

  • Very fast one-click flow
  • Low entry price
  • Bulk and multilingual

Pangram Labs

A research-driven detector built around keeping false positives extremely low.

Pangram Labs is a newer detector that made its name by attacking the problem most tools quietly tolerate: wrongly accusing human writers. Its pitch is a false-positive rate low eno...

  • Low false-positive design goal
  • Sentence-level attribution
  • Research-backed methodology

HIX Bypass

A humanizer bundled into a larger writing suite, with built-in detector scoring.

HIX Bypass sits inside the broader HIX.AI product family, and that context is the main reason to pick it. Instead of rewriting blind, it runs your output through several detector c...

  • Built-in multi-detector scoring
  • Multiple rewrite strengths
  • Part of a full writing suite

Twixify

A humanizer that tries to copy your writing style instead of flattening it.

Twixify takes a different angle from the one-click crowd: you can feed it samples of your own writing, and it attempts to rewrite AI drafts in that voice rather than in a generic n...

  • Learns from your own samples
  • Preset registers for academic and casual tone
  • Low entry price with a free tier

Smodin

An academic writing suite where AI detection sits next to a rewriter and a plagiarism check.

Smodin is the consolidation play in this category. Instead of selling one capability well, it bundles an AI content detector, a humanizer, a plagiarism scanner, a citation generato...

  • Detector, humanizer and plagiarism check in one subscription
  • Very broad language coverage for the price
  • Sentence-level highlighting on detection results

Hemingway Editor

Not a humanizer at all, and often the tool people actually needed.

Hemingway Editor is a rule-based readability checker, and it earns a place in this category because a large share of people searching for a humanizer have a prose problem rather th...

  • Genuinely free web version, no signup, nothing held back
  • Colour-coded readability, passive voice and adverb flags
  • Rule-based and instant, with an offline desktop option

Wordtune

The rewriting companion from AI21 Labs: pick from several phrasings per sentence, never generates from scratch.

Wordtune is built by AI21 Labs as a rewriting companion rather than a content generator, and that framing is the whole point. You write the sentence, highlight the clunky part, and...

  • Multiple rewrites per sentence
  • Tone control: casual, formal, shorten, expand
  • Browser extension + Google Docs/Word

Rewritify

A dedicated humanizer that overhauls AI text with multiple bypass modes and a built-in detector check.

Rewritify is a purpose-built humanizer that goes further than synonym swaps: it restructures sentences and varies rhythm across several modes, Fast, Creative and Enhanced, then run...

  • Multiple bypass modes
  • Built-in multi-detector check
  • 30+ languages

GPTKit

A multi-model detector that aggregates six detection methods into one verdict.

GPTKit takes a committee approach to detection. Instead of one model making the call, it runs six different AI-detection techniques, from DistilBERT and RoBERTa classifiers to perp...

  • Six detection methods aggregated
  • Free guest tier, no account needed
  • Team credit sharing

HideMyAI

A humanizer that rewrites AI drafts and reprocesses them free until they pass a detector.

HideMyAI is a humanizer built around the promise of undetectability. You paste AI-generated text and it restructures the prose, strips AI-style watermarks and patterns, and then ch...

  • Auto-reprocesses until it passes a detector
  • Free demo, multilingual
  • Writing-level presets

Latest guides

Hub guide

Best AI Detectors in 2026: Tested & Ranked

AI Detectors

AI detection is no longer a novelty. In 2026 it sits inside classrooms, newsrooms, and content pipelines, and the tools behind it range from free no-signup chec...

Hub guide

Best AI Humanizers in 2026: Ranked & Compared

AI Humanizers

Every detector spawned a counter-tool. AI humanizers rewrite robotic drafts into text with more natural rhythm and variation, which lowers the chance of trippin...

Guide

Best AI Detector for SEO Content in 2026

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SEO teams publish at scale, and a single flagged draft can ripple across an entire site's reputation. The right detector for content pipelines is not the same t...

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Best AI Detector According to Reddit in 2026

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Type 'best AI detector' into a search engine and Reddit threads show up on the first page. Subreddits like r/teachers, r/GPTZero, r/ChatGPT, and r/college are f...

Guide

Best AI Detector for Teachers in 2026

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Teachers sit on the other side of the detector from students. You are not trying to lower a score; you are trying to make a fair call about work someone submitt...