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.
Counter resets at midnight UTC. Tied to your browser session and IP, not to an email. For a student this covers a draft, a revision, and a final pre-submission pass. For a writer it covers a typical day of deliverables. The cap is generous enough that most casual users never hit it, and tight enough to keep the anonymous tier sustainable without a login gate or ad load on the result page.
Roughly 800 words, the standard college essay length. Long enough for a college essay, a blog draft, or a sample chapter. Longer pieces split into sections, scanned one at a time within the daily three-scan budget. Pro raises the per-scan cap to 10,000 chars and unlocks file upload.
Green, yellow, red on each sentence so you see exactly which lines drove the score. Not paywalled, not summarised into a single overall percentage. Most competitor free tiers hide the highlights behind a paid plan; the no-login path here ships them by default because a number with no evidence is hard to act on.
One paste returns the AI versus human verdict, a 0 to 100 Authenticity Score on the same scale paid users see, and a Plagiarism Risk read flagging stock phrasings, generic definitions, and citation-risky claims. Three reads on a single paste, no extra clicks, no login required for the real score.
GPT-3.5, GPT-4, GPT-4o, GPT-5, Claude 3, Claude 3.5, Gemini 1.5, Gemini 2.0, and Llama 3. Same multi-model classifier as the paid tier. No source-model gating where ChatGPT works on the no-login path but Claude or Gemini detection sits behind a paywall.
No banner ads, no interstitial upsell prompts pasted over the highlights, no competing-detector advertising in the side panel. The free tier is funded by paid plans, not by monetising attention on the result page. ZeroGPT lets you scan unlimited text but runs ads on the result; TextSight chose a smaller anonymous quota and a clean panel instead.
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.
The single biggest practical reason to log in. Without an account, past scans stay tied to the browser session that produced them. Closing the tab loses access to the result. A free account adds 7 days of history that follows you between phone, laptop, and tablet. Pro extends history to 90 days, Business keeps everything indefinitely with audit metadata attached.
Students with a verified .edu email get Pro at $14.99 effective on annual rather than the standard $19.99 monthly. The discount is gated behind email verification because the .edu check is the entire mechanism. Anyone on the anonymous path who would qualify should sign up specifically to take it; savings are roughly $60 a year on annual billing.
Business workspaces ship with an audit log that records who scanned what and when, scoped to the team. Useful for content agencies running detection across multiple writers, university departments tracking submissions, and any team that needs an after-the-fact record. The audit log presumes user records, so it presumes a login.
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 require a real billing contact. If you want to stay on the anonymous quota, no login is needed. If you want to upgrade, login is part of the payment surface, not a separate gate.
The TextSight Chrome extension that scans selected text on any webpage requires authentication. So does the WordPress plugin and the REST API for wiring detection into a CMS, LMS, or automation pipeline. Both surfaces need an account to issue an API key or extension token. The Chrome extension is available from Starter upward; API access from Starter and above.
The anonymous path is paste-only. PDF, DOCX, and TXT file upload and URL ingest start at Pro and require an account. Business adds branded PDF reports with your organisation logo on each detector output, useful when results need to be shared back as a deliverable.
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.
The first time you load the app, the browser receives a random session token. It is a string of bytes with no link to your name, email, or any personal identifier. The token exists so the quota counter knows which scans belong to which session within a 24-hour window. Clearing cookies or opening a private window starts a fresh anonymous session with no link to prior activity.
The cookie alone would let anyone wipe their counter by clearing storage every few minutes. A secondary counter against the IP address prevents that. Shared library, coffee shop, school, or office networks share a single daily quota across every visitor on that IP, which is the intended trade-off for keeping the no-login tier sustainable.
Because no email is collected on the no-login path, no marketing email can be sent. There is no drip onboarding sequence, no abandoned-scan follow-up, no "your free scans reset tomorrow" reminder. Nothing follows you out of the browser session. The login UI never asks for an address, so no address ever lands in a CRM.
The text you paste is processed by the classifier, scored, 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 privacy posture on the no-login tier is strictly stronger than on the paid tiers, because there is no account row to link a scan to in the first place.
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. Roughly 38 percent of TextSight's anonymous free-tier sessions in 2025-26 data come from .edu IP ranges, and student forums repeatedly cite "did not want it in my school account" as the leading reason for picking a no-login tool.
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 renders on the first paint. No login prompt, no modal, no email gate, no social-login button. If you have used the detector before on this browser, the daily quota counter shows in the corner; if not, you start with the full 3 scans available.
Up to 5,000 characters. The character counter updates as you type or paste. Most college essays fit in one paste; longer pieces split into roughly six sections at the free cap. There is no upload button on the anonymous path; paste is the only ingest method until you log in to Pro and unlock file ingest.
The classifier runs in about six to ten seconds for an 800-word piece. The result panel shows an overall AI versus human score, the 0 to 100 Authenticity Score, the Plagiarism Risk read, and sentence-by-sentence colour highlights in one view. No interstitial, no login wall pasted over the result.
No single detector is the final word. If the score reads borderline, paste the passage into a second detector and compare. Treat the agreement of two independent classifiers as a stronger signal than either one alone. Two more scans remain in the daily allowance for re-checking after edits, and the counter resets at midnight UTC.
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.