AI detectors that run without an account
An AI detector runs without an account for 23 of the 72 cards in the index (Decopy, GPTKit and Detecting-AI.com joined on 10 November 2026, then StealthWriter and the ElevenLabs Classifier later the same day, then SEO.ai, Ghostbuster and Hiya Deepfake Detector with the eleventh wave), by the no_account field compiled from each card's free tier and input limit statements on 9 November 2026: the vendor's own page says that a check runs with no sign-up, login or account, and the table quotes the sentence and the limit that applies to it. The 18 run from Scribbr's "unlimited free AI checks, no sign-up required" and Phrasly's "no signup barriers" with no character limit, to GPTZero's 10,000-character widget, AIDetectPlus's 3,000-character box and WasItAI's guest checks until a guest limit. Two of the 18 are statements about a page that no longer behaves as stated: BrandWell's no-account scan is on an archived page of 9 August 2026, and Deepware's scanner host was unreachable on 9 November 2026. A "no credit card" statement (ZeroGPT, Pangram, Winston AI) is not a no-account statement and does not qualify; an open-source tool run locally (GPT-2 Output Detector, DetectGPT) needs no account by its nature but states nothing, and only GLTR, whose page names a public demo with no account, is counted. This page is one of the views under AI detectors by feature; the free tiers ranking orders every free allowance by size, the free checks per day ranking by cadence, and the full index shows all 72 cards.
- Field 1No-account statement as stated
- Field 2Limit on the account-less check as stated
- Field 3Modality
- Field 4Source, read date
One field, no_account, set to true only where a vendor page read on 8 or 9 November 2026 states the absence of a sign-up, login or account for a check, and carrying the sentence as stated, the source and the read date. The limit column quotes what the vendor says applies to the account-less check, because the no-account route is almost always the smallest one: GPTZero's widget takes 10,000 characters where a free account takes 150,000, QuillBot's 1,200 words where Premium has no limit, and AIDetectPlus's 3,000 characters where signed-in detectors take whole documents. A vendor that says "free" without saying "no account" is not in the table, which is why ZeroGPT, Pangram, Sapling, Copyleaks, Surfer, Quetext, TruthScan, Illuminarty and AI or Not are absent although each states a free tier. Field rules are in the methodology.
Which field decides whether a detector runs without an account?
| Detector | No-account statement as stated | Limit on the account-less check as stated | Modality | Source, read date |
|---|---|---|---|---|
 Scribbr | "Unlimited free AI checks, no sign-up required" | No limit stated | Text | scribbr.com/ai-detector, 8 November 2026 |
 Phrasly | "no credit card, no signup barriers"; text highlighting only for signed-in users | No character limits, no monthly scan caps | Text, image | phrasly.ai/ai-detector, 8 November 2026 |
 Grammarly | "Free AI Detector, no sign-up needed" | Allowance per period not published | Text | grammarly.com/plans, 8 November 2026 |
 Smodin | "Free to use on the web without an account"; sentence-level analysis needs a free account | 50,000 characters per check; 1,000-character minimum | Text | smodin.io/ai-content-detector, 9 November 2026 |
 Undetectable AI | "Free AI Detector: no signup" | Up to 10,000 words per check | Text | undetectable.ai/pricing, 9 November 2026 |
 GPTZero | "Widget: 10,000 characters per scan without an account" | 10,000 characters per scan (150,000 with a free account) | Text | gptzero.me/faq, 8 November 2026 |
 QuillBot | "no sign-up for scans under 1,200 words" | Up to 1,200 words per scan, 6 scans per day | Text, image | quillbot.com/ai-content-detector, 8 November 2026 |
 AIDetectPlus | "the home page widget scans up to 3,000 characters with no account" | 3,000 characters; signed-in detectors take whole documents | Text | aidetectplus.com/ai-detector, 9 November 2026 |
 JustDone | "No setup and no account needed for your first scan" | First scan; quantity per period not published | Text | justdone.com/ai-detector, 8 November 2026 |
 BrandWell | Archived page of 9 August 2026: "a free scan of 2,500 characters with no account"; the live Moxby Mod requires the Moxby Free plan | 2,500 characters (archived); 10,000 per check in the Moxby Mod | Text | moxby.com marketplace, 9 November 2026 |
 GLTR | "public demo at demo.gltr.io with no account" | No limit published | Text | github.com HendrikStrobelt/detecting-fake-text, 9 November 2026 |
 Hive | "Free AI detector Chrome extension (no fees or Hive login required)" | No cap stated | Image, video, text, voice, music | thehive.ai, 8 November 2026 |
 WasItAI | "guest checks run without an account until the guest limit" | Guest limit not sized; 10 images a month on the free account | Image | wasitai.com/api, 9 November 2026 |
 Sightengine | "the web demo is free until its limit, then asks for a free account" | Images up to 12 MB; demo limit not sized | Image, video | sightengine.com/pricing, 9 November 2026 |
 Deepware | "Free web scanner with no account (BETA)"; host unreachable on 9 November 2026 | Videos up to 10 minutes | Video | archived scanner.deepware.ai, 9 November 2026 |
 Decopy | "Basic detection does not require account registration, making it easier to start checking text right away" | Up to 200,000 characters per check; a daily usage notice states no figure | Text | decopy.ai/ai-detector, 9 November 2026 |
 GPTKit | "First 2048 characters are free for guest users" | 2048 characters per request, 5 requests a minute | Text | gptkit.ai, 9 November 2026 |
 Detecting-AI.com | "Paste text or upload a file for a free AI score, no signup required"; pricing: "No account required" | Up to 300 detections a day, 15,000 characters per check | Text | detecting-ai.com, 10 November 2026 |
 StealthWriter | "No account needed. Up to 500 words per scan. Daily demo limits apply." | 500 words per scan; daily demo limits with no figure stated | Text | stealthwriter.ai/ai-detector, 10 November 2026 |
 ElevenLabs Classifier | "We use only the first minute of your sample, and no login is required." | First minute of an uploaded audio or video sample; no quota stated | Voice (ElevenLabs-generated speech only) | elevenlabs.io/ai-speech-classifier, 10 November 2026 |
 SEO.ai | "Free AI Content Detector, Super Fast, No Login Required" (page title) | 20,000 characters per check, enforced by the widget | Text | seo.ai, 10 November 2026 |
 Ghostbuster | The demo page scores pasted text with no sign-in, key or account prompt; the README's classify.py needs the user's own OpenAI key | Refuses text under 100 words; no maximum published | Text | ghostbuster.app, 10 November 2026 |
 Hiya Deepfake Detector | "Download our FREE browser extension to verify if the voice you are hearing in video or audio is authentic"; installs from the Chrome Web Store with no Hiya sign-in | One second of audio per verification; no quota stated | Voice | hiya.com, 10 November 2026 |
Values as each vendor states them, read 8 and 9 November 2026, ordered by the size of the account-less check from unlimited to the smallest stated box, with the four media cards after the text cards. Three cards state the opposite in terms: SynthID requires a Google or Apple sign-in for the Detector portal, Pangram's 20 free credits a day start "after signing up for the free plan", and Codequiry's free plan covers peer similarity checks and excludes AI detection. Turnitin, Turnitin Clarity, Compilatio, Sensity, Pindrop Pulse and Reality Defender state no free check of any kind for the detector, by licence, trial or account.
Why each card is in this view
- AIDI-D-0009Scribbr
unlimited free checks with no sign-up and a no-storage statement (scribbr.com/ai-detector, read 8 November 2026); 2% of 42 human papers flagged in Walters 2023. The free detector covers GPT-2, GPT-3 and GPT-3.5 "with average accuracy" by the vendor's own words.
- AIDI-D-0012Phrasly
no sign-up, no character limit and no scan cap, with text deleted after analysis (phrasly.ai/ai-detector, read 8 November 2026); no study record. Signing in adds text highlighting.
- AIDI-D-0008Grammarly
a free detector with no sign-up on the plans page, where the "Detect AI generated text" row is checked for Plus and Pro and unchecked for Free, so the free check and the plan feature are different products (grammarly.com/plans, read 8 November 2026); no study record, a RAID entry of 9 February 2026.
- AIDI-D-0029Smodin
a free web tool without an account up to 50,000 characters, with sentence-level analysis behind a free account (smodin.io/ai-content-detector, read 9 November 2026); no study record.
- AIDI-D-0024Undetectable AI
no sign-up up to 10,000 words per check, the largest account-less text limit stated in words (undetectable.ai/pricing, read 9 November 2026); 1 study record, Kar 2024, where it read one ChatGPT article as 100% AI through three paraphrases.
- AIDI-D-0001GPTZero
a 10,000-character widget without an account against 150,000 characters with a free account (gptzero.me/faq, read 8 November 2026); 16 study records, the most in the index, from 9 of 18 false accusations in Weber-Wulff 2023 to 0 of 495 in Epoch AI 2026.
- AIDI-D-0007QuillBot
no sign-up under 1,200 words, 6 scans a day (quillbot.com/ai-content-detector, read 8 November 2026); 2 study records (Kar 2024, Alshammari and Rao 2025) and a RAID leaderboard entry of 30 January 2025 (leaderboard question).
- AIDI-D-0018AIDetectPlus
a 3,000-character home page box with no account, against signed-in detectors for essays, papers and PDFs (aidetectplus.com/ai-detector, read 9 November 2026); no study record.
- AIDI-D-0013JustDone
no account for the first scan, with the quantity afterwards not published (justdone.com/ai-detector, read 8 November 2026); no study record, and a vendor-published 10.3% error rate (JustDone legit question).
- AIDI-D-0030BrandWell
a no-account scan on the archived BrandWell page of 9 August 2026, while the live URL resolves to a Moxby Mod on the Moxby Free plan (moxby.com, read 9 November 2026); 18 of 54 correct in Weber-Wulff 2023 as Content at Scale, 10% of 42 human papers flagged in Walters 2023.
- AIDI-D-0017GLTR
a public demo with no account and Apache-licensed code that runs locally (github.com, read 9 November 2026); 4 study records, including a 99.3% false positive rate at threshold 0.5 in RAID 2024 on a 2019 model.
- AIDI-D-0016Hive
a Chrome extension with no fees or login, beside an enterprise API priced by contact (thehive.ai, read 8 November 2026); 2 image records (Ha and Passananti 2024, RAID image 2025).
- AIDI-D-0021WasItAI
guest checks without an account until a guest limit the page does not size (wasitai.com/api, read 9 November 2026); no study record, and images not stored beyond the request.
- AIDI-D-0036Sightengine
a web demo free until its limit, then a free account with 2,000 operations a month (sightengine.com/pricing, read 9 November 2026); 1 image record (RAID image 2025).
- AIDI-D-0037Deepware
a BETA scanner with no account on the archived capture of 8 August 2026, unreachable on 9 November 2026 (web.archive.org, read 9 November 2026); no study record, and terms that share uploaded samples with the service's partners.
- AIDI-D-0043Decopy
basic detection without registration up to 200,000 characters (decopy.ai/ai-detector, read 9 November 2026); no study record and no accuracy rate published.
- AIDI-D-0045GPTKit
2048 characters per guest request (gptkit.ai, read 9 November 2026); 0 of 114 false positives in Orenstrakh 2023, 4.5% accuracy on manipulated AI text in Perkins 2024.
- AIDI-D-0051Detecting-AI.com
300 detections a day of 15,000 characters with no account, the largest account-less daily allowance in the index (detecting-ai.com/pricing, read 10 November 2026); no study record.
- AIDI-D-0056StealthWriter
the public demo states no account for up to 500 words per scan with daily demo limits and no figure; the Free account adds 10 scans a day at 1,000 words (stealthwriter.ai/ai-detector, read 10 November 2026); no study record.
- AIDI-D-0062ElevenLabs Classifier
the FAQ states no login for the first minute of a sample, the one voice card in this view; it scores ElevenLabs-generated audio only (elevenlabs.io/ai-speech-classifier, read 10 November 2026); no study record.
- AIDI-D-0069SEO.ai
the page title states no login and the widget enforces 20,000 characters per check; the paid plans price the SEO platform, not the detector (seo.ai, read 10 November 2026).
- AIDI-D-0072Ghostbuster
the demo at ghostbuster.app takes pasted text with no account, key or price, refusing text under 100 words; the code needs an OpenAI key (ghostbuster.app, read 10 November 2026).
- AIDI-D-0073Hiya Deepfake Detector
a free Chrome extension with no Hiya sign-in, scoring the voice in a playing video from one second of audio (chromewebstore.google.com, read 10 November 2026). Grammica and AI Writing Check, added the same day, needed no account on their archived pages but are withdrawn, so no flag is set (the Writer treatment); IvyPanda shows no sign-in prompt but states no no-account line and stays out under the statements rule.
What the evidence says about account-less checks
The account-less route is the one most studies used. Weber-Wulff 2023 tested 14 tools in March 2023 through their public interfaces, Walters 2023 ran 16 free or trial tools, Kar 2024 tested free detectors by name, and Pegoraro 2023 pasted texts into 20 tools and methods; none of those records distinguishes a logged-in check from a guest one, and the vendors' own pages say the guest route is the smaller product. GPTZero is the clearest case in the table: the widget a study author would reach takes 10,000 characters, and the vendor states 9 of 18 false accusations in Weber-Wulff 2023 beside 0 of 495 in Epoch AI 2026 across 16 records (arXiv 2306.15666, read 8 November 2026; Epoch AI 2026 record). Of the 15 cards here, 8 have a study record of any kind (Scribbr, GPTZero, QuillBot, Undetectable AI, BrandWell, GLTR, Hive, Sightengine) and 7 have none, against the index as a whole, where 35 of 72 cards have a record.
The account also decides what happens to the text. Scribbr, Phrasly, Smodin and Undetectable AI state that an account-less submission is not stored; GPTZero states that dashboard inputs are stored while API inputs are not, and Grammarly and JustDone state no retention terms for the free check on the pages read, as the do AI detectors store your text question sets out. Smodin's and Phrasly's terms grant the vendor a perpetual licence over user content beside the no-storage statement on the detector page, two documents a reader should read together. The deletion routes question lists the 17 cards with a stated removal mechanism, almost all of which require the account the checks in this view do without.
What a reader gives up without an account is stated on the same pages: text highlighting (Phrasly), sentence-level analysis (Smodin), a larger limit (GPTZero, QuillBot, AIDetectPlus), history and reports (ZeroGPT, Winston AI, both outside this view), and any API, which every vendor in the index issues to an account. The free APIs question lists the 10 cards with a free allowance covering API calls, none of them without a key. No detector score should be the only evidence in a misconduct, hiring or publishing decision, and the vendors' own caveats on the cards say so in their words.
A phone browser runs every no-account tool here; the mobile apps view lists the five cards that name a mobile app of their own, read 10 November 2026.
Sources
- https://www.scribbr.com/ai-detector/ (read 8 November 2026)
- https://phrasly.ai/ai-detector (read 8 November 2026)
- https://www.grammarly.com/plans (read 8 November 2026)
- https://smodin.io/ai-content-detector (read 9 November 2026)
- https://undetectable.ai/pricing (read 9 November 2026)
- https://gptzero.me/faq (read 8 November 2026)
- https://quillbot.com/ai-content-detector (read 8 November 2026)
- https://aidetectplus.com/ai-detector (read 9 November 2026)
- https://justdone.com/ai-detector (read 8 November 2026)
- https://moxby.com/marketplace/ai-content-detector/ (read 9 November 2026)
- https://github.com/HendrikStrobelt/detecting-fake-text (read 9 November 2026)
- https://thehive.ai/apis/ai-generated-content-classification (read 8 November 2026)
- https://wasitai.com/api (read 9 November 2026)
- https://sightengine.com/pricing (read 9 November 2026)
- https://web.archive.org/web/20260808164435/https://scanner.deepware.ai/ (read 9 November 2026)
- https://arxiv.org/pdf/2306.15666 (read 8 November 2026)
Revision log: 2026-11-09: view created at index version 2026.11.92026-11-10: Decopy, GPTKit and Detecting-AI.com added (ninth wave), 18 cards2026-11-10: StealthWriter and ElevenLabs Classifier added (tenth wave), 20 cards; Binoculars' Hugging Face Space has no login wall but no statement, so it stays out under the statements rule2026-11-10: SEO.ai, Ghostbuster and Hiya Deepfake Detector added (eleventh wave), 23 cards; Grammica and AI Writing Check withdrawn and not flagged, IvyPanda states no line2026-11-10: twelfth-wave pages linked
FAQ: AI detectors without an account
Which AI detectors work without creating an account?
Fifteen of 72 cards state it on 8 and 9 November 2026: Scribbr, Phrasly, Grammarly, Smodin, Undetectable AI, GPTZero, QuillBot, AIDetectPlus, JustDone, BrandWell (archived page), GLTR, Hive, WasItAI, Sightengine and Deepware (host unreachable). Each quote and limit is in the table with its source.
Which free detector takes the most text without signing up?
Scribbr and Phrasly state no limit on account-less checks; Smodin states 50,000 characters per check, Undetectable AI 10,000 words and GPTZero 10,000 characters, as read on 8 and 9 November 2026. Phrasly's web tool asks for at least 30 words and Smodin's box for at least 1,000 characters.
Is "no credit card" the same as "no account"?
No. ZeroGPT, Pangram and Winston AI state no credit card for their free tiers and still require a sign-up (Pangram's 20 daily credits start "after signing up for the free plan"), so none of the three is in this view. SynthID's Detector portal requires a Google or Apple sign-in.
Do account-less checks keep the text?
Four of the 15 state that they do not (Scribbr, Phrasly, Smodin, Undetectable AI); GPTZero stores dashboard inputs and uses them in aggregate; Grammarly and JustDone state no retention terms on the pages read, all as of 8 and 9 November 2026. The data retention ranking sorts every stated period.
Have the account-less detectors been tested?
Eight of the 15 have a study record: GPTZero (16 records), GLTR (4), BrandWell (3, as Content at Scale), QuillBot (2), Hive (2, both images), Scribbr (1), Undetectable AI (1) and Sightengine (1, image). Seven have none. The independently tested ranking orders every card with a record.
