Docs checked New
GPTinf
Humanizes AI text and bundles an AI detector, paraphraser, plagiarism and grammar checkers.
AI Detector Bypassers from USD 4.99
AI humanizers you can use without an account
Tools whose core function worked without an account and without payment details when we checked.
What has to be true to appear here
At review time the core function could be used without an account and without entering payment details.
30 tools meet this criterion.
Docs checked New 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 New
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 New
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 New
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 New
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
Docs checked API New
Isgen
Multilingual AI detector with sentence-level highlighting, bulk scanning and an academic-priced plan.
AI Detectors from USD 8.00
Docs checked API New
Sapling AI Content Detector
Free AI content detector with sentence-level scores, a Chrome extension and a metered developer API.
AI Detectors from USD 12.00
Docs checked New
Scribbr AI Detector
Free student-facing AI detector with paragraph-level feedback and a paid premium GPT-4-capable tier.
AI Detectors from USD 19.95
Docs checked API New
Undetectable.ai AI Detector
Free no-signup detector that aggregates results from several third-party AI detection models at once.
AI Detectors from USD 5.00
Docs checked New
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 New
Humanize AI
Web tool that converts AI-generated text into human-style writing, with a free unlimited tier.
AI Humanizers from USD 12.00
Docs checked New
Surfer AI Humanizer
Free web tool that rewrites AI-generated English text into human-style prose.
AI Humanizers from USD 49.00
Docs checked New
Hemingway Editor
Readability editor whose paid Plus tier adds AI sentence rewrites and tone adjustment.
Paraphrasers & Rewriters from USD 8.33
Docs checked New
iLoveNote (formerly EditPad)
Free online paraphrasing tool, rebranded from EditPad, allowing 1,000 words per rewrite.
Paraphrasers & Rewriters from USD 6.58
Docs checked API New
Paraphraser.io
Online paraphrasing tool with five rewrite modes and a 600-word free limit per submission.
Paraphrasers & Rewriters from USD 4.55
Docs checked API New
Prepostseo Paraphrasing Tool
Paraphrasing tool inside Prepostseo's SEO toolkit, sold as its own plan alongside a humanizer.
Paraphrasers & Rewriters from USD 6.75
Docs checked New
QuillBot
Paraphrasing suite with multiple rewrite modes, grammar checker, summarizer and AI humanizer.
Paraphrasers & Rewriters from USD 8.33
Docs checked API New
Copyscape
Duplicate content search that finds copies of a web page or text elsewhere online.
Plagiarism & Originality Checkers from USD 0.03
Docs checked API New
DupliChecker
Free web-based plagiarism checker with paid search-and-word packages and API access.
Plagiarism & Originality Checkers from USD 9.99
Docs checked New
Plagiarism Checker X
Desktop plagiarism and text-similarity software sold as a one-time perpetual licence.
Plagiarism & Originality Checkers from USD 39.95
Docs checked API New
Plagiarism Detector
Online plagiarism checker with a free tier, paid word packages and a developer API.
Plagiarism & Originality Checkers from USD 20.00
Established API New
GPTZero
AI text detector for educators and publishers with sentence-level highlighting and batch file scanning.
AI Detectors Freemium
Established New Free
Spinbot
Free one-click article spinner and text rewriter that needs no registration.
Listed New
UnAIMyText
Free humanizer allowing 500 words per input without an account, plus a Pro tier with a 2,000-word input cap.
AI Detector Bypassers Freemium
Listed New
JustDone AI Detector
AI detector in JustDone's student toolkit, publishing its own error rate and estimating Turnitin scores.
AI Detectors Freemium
Listed API New
GPTZero API
AI detection API exposing the same document, sentence and paragraph scores used by the GPTZero web app.
Humanizer APIs Freemium
Listed New
Humanizar Texto
Spanish-first AI text humanizer, free without registration, accepting up to 2,000 words per submission.
Multilingual Humanizers Freemium
Listed API New Free
ZeroGPT AI Humanizer
Free no-signup humanizer offered in English, French, German, Spanish, Italian and Portuguese.
Listed New Free
Ahrefs Paraphrasing Tool
Free paraphrasing tool from Ahrefs with tone selection and a 2,048-character input limit.