A login at the door is friction that most users abandon. The TextSight free tier removes it entirely: open app.textsight.ai, the text input renders on the first paint, and Scan works on the first click. No login prompt, no social-login button, no password modal, no email field, no card. The first 3 scans every day run anonymously, tracked against your browser session and IP rather than any identity. You read the same Authenticity Score, the same sentence-level highlight map, and the same Plagiarism Risk read paid users see, in the same panel, with no signup wall pasted over the result. For students on shared computers, freelancers under NDA, and anyone who refuses to authenticate just to check a paragraph, this page is the entry point.
Same anonymous quota, narrower search intent. Both modifiers get used loosely. Stacking them strictly is what trims the field down to a handful of honest options.
A no-signup detector lets you finish a scan without creating an account. The signup form may still appear later (after one demo scan, after viewing the result), or the login button may sit at the top of the page even though it is optional. The user research signal is "I do not want to register," and a no-signup tool clears that bar by letting the scan complete before the upsell.
A no-login detector goes further. The text input renders immediately. There is no login modal blocking the page, no "Continue with Google" button you have to click before the scan box appears, no social-login row at the top of the input. The search intent is stricter: people typing "free AI detector no login" usually want to verify that nothing on the page asks them to authenticate before they get to work.
No signup is required to complete the daily 3-scan allowance, and no login UI gatekeeps the scan box. The result panel renders in place, the highlights render in place, the Authenticity Score renders in place. Login lives in a single nav-bar link for people who want it, not as a modal pasted between the user and the input. That distinction is what most "no signup" pages get wrong.
A page-load modal asking you to sign in. A "Continue with Google" interstitial before the input box. A spinner that resolves into "Create an account to view your full report." A toast that says "Log in to keep your history" the second you paste. None of those appear on the anonymous path here. The first time you see an account UI is when you click the Sign in link in the nav yourself.
Anonymous scans are not a watered-down preview. Same classifier, same scoring depth, same per-sentence evidence as the paid tier. Only daily volume and account-side features differ.
The point of staying logged out is that nothing waits for you to authenticate. The AI versus human verdict, the 0 to 100 Authenticity Score, the colour-coded sentence map, and the Plagiarism Risk read all appear in the same result panel on the first scan, while you are still anonymous. There is no "view full report" door that opens only after you create a profile. What an account holder sees in their dashboard is what a logged-out visitor sees in place.
The daily allowance is three scans, counted against your browser session and IP rather than a username. Nothing you scan accrues to a profile, a usage graph, or an account-level history that someone else with the login could open later. Counter resets at midnight UTC. For a quick logged-out check that covers a draft, one revision, and a final pass before you walk away, three is the working budget.
Roughly 800 words, the standard college essay length. Long enough for an essay, a blog draft, or a sample chapter. Because the logged-out path is deliberately paste-only, there is no file picker that quietly routes you to a sign-in screen first; you paste, you scan, you read. Longer pieces split into sections scanned one at a time within the three-scan budget. Pro raises the per-scan cap to 10,000 chars and unlocks file upload, both of which sit behind an account.
Green, yellow, red on each sentence so you see exactly which lines drove the score. They are not summarised into a single percentage that a logged-in plan would then expand. Many competitor tools show the number to anonymous visitors but reserve the line-by-line breakdown for account holders. Here the full highlight map is part of the logged-out result, because a score with no visible evidence is hard to act on.
Coverage spans GPT-3.5, GPT-4, GPT-4o, GPT-5, Claude 3, Claude 3.5, Gemini 1.5, Gemini 2.0, and Llama 3. The anonymous path runs the same multi-model classifier as the paid tiers, not a lighter model reserved for visitors who have not signed in. There is no source-model gating where ChatGPT is read while logged out but Claude or Gemini detection waits behind a login.
No banner ads, no interstitial upsell pasted over the highlights, no "log in to keep this" toast the moment a result lands. A logged-out visitor is often treated as inventory to monetise; here the free tier is funded by paid plans instead. ZeroGPT lets anonymous users scan unlimited text but runs ads on the result; TextSight chose a smaller logged-out quota and a clean panel.
3 scans a day at 5,000 chars covers casual personal use indefinitely, with no account. Paid tiers add history sync, file upload, API, and team features. Full details on the pricing page.
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Anonymous is the right path for one-off checks and sensitive drafts. Logging in is worth it once you find yourself wanting to reopen yesterday's result, run the Chrome extension, or upload a PDF. Detection quality does not change; the workflow surface does.
This is the one thing staying logged out genuinely costs you. While anonymous, a result lives only in the open tab and the current session; close it and the scan is gone, by design, since there is no profile to file it under. The moment you want to pull up yesterday's check on a different device, that is the signal to log in. A free account keeps 7 days of synced history, Pro 90 days, Business indefinitely. Until then, logged-out scans stay ephemeral on purpose.
Anonymous scans leave no attributable trail, which is exactly the point for a private check and exactly wrong for a team that needs accountability. A content agency reviewing five writers, or a department logging submissions, needs each scan tied to a named person. That requires logged-in user records and the Business audit log. If you want anonymity, stay logged out; if you need attribution, an account is the trade.
Starter, Pro, and Business need an email for billing, receipts, and tax invoices. There is no anonymous paid tier and there cannot be: card processors, refund flows, and GST invoicing all need a real billing contact. Staying logged out keeps you on the three-scan daily allowance forever. Upgrading is a deliberate choice to attach an identity, not a login wall sprung on you mid-scan.
The Chrome extension that scans selected text on any page, the WordPress plugin, and the REST API for wiring detection into a CMS, LMS, or automation pipeline all live outside the anonymous paste box and all need authentication to issue a token or key. The logged-out path covers the in-browser paste-and-read loop; the moment you want detection embedded elsewhere, that is account territory. The extension is available from Starter upward, API access from Starter and above.
The logged-out path is paste-only on purpose, since a file picker is a common place anonymous tools quietly insert a sign-in step. PDF, DOCX, and TXT upload and URL ingest start at Pro and require an account. Business adds branded PDF reports with your organisation logo on each output, useful when a result has to be handed back as a deliverable rather than just read on screen.
Quota tracking without a login uses two signals: a session cookie and your IP address. Neither links to an identity until you choose to log in.
A login normally gives a tool the stable identifier it uses to count scans. Stay logged out and that identifier has to come from somewhere else. Here it is a random session token the browser receives on first load: a string of bytes with no link to your name, email, or any account. It exists only so the counter knows which logged-out scans belong to the same browser within a 24-hour window. Clearing cookies or opening a private window starts a fresh anonymous session with no thread back to the previous one.
Because there is no login to anchor the count, the cookie alone could be wiped every few minutes to reset the allowance. A second counter on the IP address closes that loop. The trade-off of having no account is shared limits on shared connections: library, coffee-shop, school, and office networks pool one daily quota across everyone behind that IP. That is the cost of not asking anyone to identify themselves.
Staying logged out has a quiet benefit most signup-free tools still miss: there is no inbox to reach. No drip onboarding, no abandoned-scan nudge, no "your free scans reset tomorrow" reminder, because no field on the page ever captured an address. A logged-out visit ends when the tab closes and leaves nothing in a CRM to follow up on.
The text you paste is scored by the classifier, returned to your screen, then dropped from working memory. TextSight does not train the detector or the AI Rewriter on user-submitted text regardless of login status. The reason the logged-out posture is the strongest one available is structural: with no account, there is simply no profile row a scan could be linked to, even internally.
The login filter narrows the audience to a few clear use cases. These are the ones who type "no login" into the search box specifically.
Library terminals, lab machines, household laptops, and Chromebooks distributed by a school often run with monitored or auto-syncing browser profiles. Logging in to a detector on one of those machines can leave a trail in someone else's identity log, even if the scan itself is private. Anonymous scans do not bind to a profile, so the visit looks like ordinary web traffic. On student forums, "did not want it in my school account" comes up repeatedly as the reason for choosing a tool that never asks you to log in.
A common pattern in user research: someone wants to verify a single passage, the detector demands a login, they bounce. The friction is not the form length; it is the principle of authenticating to a vendor for a one-time check. Anonymous scans remove the trade entirely. Paste, scan, leave, no marketing CRM row created.
A copywriter, agency writer, or contract editor cannot comfortably paste a confidential draft into a tool that stores it against a login. Anonymous scans plus a no-training policy mean the text is processed, scored, and discarded. The freelancer verifies the draft reads human without leaving a paper trail in either direction.
If you check a piece of text once a month, the friction of creating an account, verifying the email, remembering the password, and accepting the cookie banner is not worth the workflow features it unlocks. The free no-login flow exists for the long tail of casual checks: a parent helping with a high-school essay, a manager spot-checking a contractor's draft, a writer verifying their own first paragraph reads natural.
Four steps from paste to verified result. No login screen, no account creation, no email verification. The anonymous tier was scoped specifically for this loop.
The text input is on screen at first paint, with no step that asks you to identify yourself: no login modal, no "Continue with Google" button, no password field, no email gate. You do not dismiss an account prompt; there is nothing to dismiss. If you have scanned on this browser today, the quota counter shows in the corner; if not, all 3 anonymous scans are available.
Up to 5,000 characters, with a live character counter. Most college essays fit in one paste; longer pieces split into roughly six sections at the free cap. Paste is the only ingest method while logged out, which is deliberate: there is no file picker that would otherwise route you through a sign-in screen before accepting the upload. File ingest opens once you log in to Pro.
The classifier runs in about six to ten seconds for an 800-word piece. The panel returns the overall AI versus human score, the 0 to 100 Authenticity Score, the Plagiarism Risk read, and sentence-by-sentence colour highlights in one view, all while you are still anonymous. Nothing pauses to ask you to create an account before showing the full report.
No single detector is the final word. If a score reads borderline, paste the passage into a second detector and compare; treat agreement between two independent classifiers as the stronger signal. Two more anonymous scans remain for re-checking after edits, and the counter resets at midnight UTC. When you close the tab the session ends and no logged-in history of the check persists.
The main AI detector landing page with the paid feature set and the full multi-model classifier write-up.
Open AI detector →Sister page on the no-account axis. Same anonymous quota, framed against the signup filter instead of the login filter.
See the no-signup page →Detector page narrowed to ChatGPT-specific output: GPT-3.5 through GPT-5, anonymous quota, no account.
See the ChatGPT page →Full tier breakdown for Free, Starter, Pro, and Business. Annual billing saves 25%.
See pricing →3 anonymous scans a day, 5,000 chars per scan, sentence-level highlights, Authenticity Score and Plagiarism Risk in the same scan. Same classifier as paid. Your first scan in about ten seconds, with no login wall between you and the result.
Other free ways to check text for AI.