Cycling through all six. Tap any point to stop.

Measured on six things

Clever AI Detector estimates how likely a text was written by AI. Get a probability score with sentence-level signals and confidence indicators.

Design

Clean two-panel hero and consistent green accents communicate the core action fast, but yellow highlighter underlines read as annotation, step section is cramped, and dark-mode media clashes with the live light theme.

Screenshots

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Clever AI Detector

About this app

Clever AI Detector is a free online tool that analyzes text and estimates the likelihood of AI-generated writing. It provides a clear probability score, confidence indicators, and sentence-level signals to help you understand which parts may appear AI-written. Check up to 10,000 words per scan with unlimited runs, no ads, and no paywall. Designed for writers, editors, students, marketers, and professionals, it offers transparent AI detection without claiming absolute certainty.

Key features

1Free AI detection up to 10,000 words per check with unlimited runs, no ads, and no paywall.
2Probability score with confidence indicators and sentence-level signals showing which lines triggered AI flags.
3No sign-up required, with a 'Try a sample' option and Check History for past scans.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Content editors and publishers

Pain points

Difficulty verifying if submitted articles are AI-generated, risk of publishing unoriginal content

Primary needs

Reliable AI detection with sentence-level insights to assess authenticity before publishing

Demographic

SEO writers and content marketers

Pain points

AI-generated content may read generically, hurting engagement and SEO rankings

Primary needs

Tool to audit content for AI-like patterns and ensure human-like quality

Demographic

Academic professionals and students

Pain points

Concerns about AI-generated essays and plagiarism, need to verify originality

Primary needs

Free, accurate AI detection with detailed sentence-level analysis to uphold academic integrity

Scout Review

Written by AI from measured evidence, scored out of 100.

Clever AI Detector is a free, no-signup AI-text detector that does the core job well and pitches itself honestly. The homepage puts input and result side by side, the green-accented UI is consistent, and the 'probability, not certainty' stance is refreshing in a category that loves fake precision. Speed is strong on desktop (100/100) and good on mobile (79/100, LCP 1.7s), with a 909ms TBT as the one soft spot. Security headers are mostly in place (10/13) but there's no CSP, no security page, and no published compliance. Accessibility scores 94/100 on the automated pass, with color-only links and small touch targets as the real fails. The product's biggest gaps are craft and documentation: yellow highlighter underlines that read as annotation, a dark-mode promo that doesn't match the live light theme, an empty result panel that previews nothing, and no FAQ explaining what a mid-range score means. For a tool whose entire value proposition is interpretive honesty, the missing explanation layer is the most fixable and most important thing to add.

Measure by measure

Usability

No sign-up, instant 'Try a sample', 10,000-word limit and Check History make it genuinely low-friction. But the empty result panel shows nothing until you submit, and there's no docs or FAQ to explain the score.

Design

Speed

Desktop Lighthouse 100/100 and mobile 79/100 with LCP 1.7s and CLS 0 are solid. The 909ms mobile TBT is the weak spot — main-thread work during load on the interactive detector UI.

Security

HTTPS enforced with HSTS, frame protection, secure cookies, SPF and DMARC — 10/13 checklist points. Missing CSP and Permissions-Policy, and no SOC 2, pen-test, or security page published.

Accessibility

Lighthouse a11y 94/100 is strong, but two real fails: links distinguishable only by color, and touch targets too small or tightly spaced. English-only, and no accessibility statement published.

Growth

A real, growing problem (AI-text verification) with a specific wedge — free 10k-word unlimited runs, sentence-level signals, and a claimed #1 GEDE benchmark ranking. The 'probability not certainty' honesty angle is a genuine differentiator vs. Originality.ai and GPTZero.

Improvement areas

No FAQ or docs explaining what the probability score, confidence indicator, and 'uncertain' sentence flags mean.
Missing CSP and Permissions-Policy headers, plus no security page or data-retention disclosure for pasted text.
Two Lighthouse a11y fails (color-only links, small touch targets) and no accessibility statement or multi-language support.

Design & Usability

Clever AI Detector's homepage does the one thing a detector site must do: it puts the input box and the result panel side by side in the hero, so you understand the product before you scroll. The green accent and pill buttons are consistent, and the 'AI SIGNALS / HUMAN FLOW' legend under the sample gauge is a nice touch that previews the sentence-level output. Where it slips is craft: yellow highlighter underlines on headings read as leftover annotation rather than designed emphasis, the five-step section is cramped with tiny numbers, and the dark-mode maker media uses a different background and button treatment than the live light homepage — a continuity break that makes the brand feel assembled from two different kits. Usability is the stronger half. No sign-up, a 'Try a sample' button, a 10,000-word cap, unlimited runs, and Check History make the path to value genuinely short. The friction is on the output side: the empty result panel shows a faint 'AI' circle and nothing else, so first-time users get no preview of what a score, verdict, or sentence highlight will look like. There's also no docs or FAQ explaining what the confidence indicator means or how to read a mid-range score — which matters a lot for a tool whose whole pitch is 'probability, not certainty.'

Speed & Security

Speed is a tale of two devices. Desktop Lighthouse is a perfect 100/100, and mobile lands at 79/100 with an LCP of 1.7s, CLS of 0, and FCP of 1.1s — all genuinely good numbers for an interactive tool. The one soft spot is a 909ms Total Blocking Time on mobile, which points to main-thread work during load, likely from the detector UI hydrating. No user complaints about lag surfaced in the collected evidence, and no published benchmarks beyond the site's own GEDE claim. Security sits in solid-but-unremarkable territory. The HTTP probe confirms HTTPS enforced, HSTS, frame protection, X-Content-Type-Options, Referrer-Policy, secure cookies, SPF, and DMARC — 10 of 13 checklist points. The gaps are a missing Content-Security-Policy and Permissions-Policy, both of which are cheap wins for a site that accepts pasted text. More importantly, there's no security page, no SOC 2 or ISO claim, no pen-test disclosure, and no bug bounty — which is normal for an early-stage indie tool but does mean a user pasting a client's unpublished article has no published statement about retention or handling. The site links Terms and says 'By checking, you agree to our Terms,' but the fetched content doesn't surface a privacy policy depth or data-retention explanation.

Accessibility & Growth

Accessibility scores well on the automated pass — Lighthouse 94/100 — but the two failing audits are the kind that actually bite: links distinguishable only by color, and touch targets without sufficient size or spacing. On a mobile-first tool where the primary action is tapping buttons under a text area, small touch targets are a real usability cost, not a checkbox. There's no accessibility statement, no WCAG conformance claim, and the site lists English as its only language. Keyboard navigation and screen-reader behavior weren't independently verified in the collected evidence. Growth is the most interesting dimension here because the idea is genuinely well-positioned. AI-text verification is a real, expanding problem across publishing, SEO, and academia, and the site names specific segments — editors vetting submissions, SEO teams auditing their own pages, writers checking their own drafts. The wedge is concrete: 10,000 words per check, unlimited runs, no ads, no paywall, versus Originality.ai's paid-only model and GPTZero's free-tier caps. The 'probability, not certainty' framing is a real differentiator in a category full of '99% accurate' claims, and the site's claimed #1 ranking on the independent GEDE benchmark is a checkable, specific proof point rather than a vague boast. The honest limit: detection accuracy is a moving target as models improve, the category is crowded, and 'free forever' has no obvious monetization path visible on the site. But as an idea with a specific audience and a real wedge, it holds up.

Conclusion

If you're an editor, SEO writer, or student who needs a fast, free sanity check on whether a chunk of text reads AI-generated, Clever AI Detector is a reasonable first stop — no signup, 10,000 words per run, unlimited checks, and sentence-level signals that tell you which lines triggered the score. It won't replace your judgment, and the site is admirably upfront about that. What it needs next is polish and explanation: fix the highlighter-underlines and the light/dark mismatch, add a CSP and a short security/data-handling note, enlarge the touch targets, and — most importantly — write a real FAQ that explains what a 60% score means, what the confidence indicator is telling you, and how to interpret a sentence marked 'uncertain.' Do that and this stops being a competent free tool and starts being a trustworthy one. The idea is sound, the positioning is honest, and the free tier is genuinely generous. The execution just needs to catch up to the pitch.

Suggestions for improvement

Publish a short FAQ explaining what the AI probability score, confidence indicator, and 'uncertain' sentence flags actually mean in practice.
Add a Content-Security-Policy and Permissions-Policy header, and a brief security/data-handling page covering retention of pasted text.
Fix the two Lighthouse a11y fails: make links distinguishable beyond color, and enlarge touch targets on the primary CTA and secondary buttons.
Replace the yellow highlighter-style heading underlines with a designed accent, and align the dark-mode promo visuals with the live light homepage.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Clever AI Detector	Originality.ai	GPTZero
Pricing model	100% free, no ads, no paywall	Paid only, credit-based subscription	Free tier with caps plus paid plans
Free word limit per scan	Up to 10,000 words, unlimited runs	No free tier; credits required	Free tier limited to shorter documents
Sentence-level highlighting	Yes, with confidence indicators per sentence	Yes, sentence-level AI detection	Yes, sentence-level highlighting
Sign-up required	No sign-up required	Account required for paid credits	Account required for saved history and paid plans
Primary audience	Editors, SEO writers, students, professionals	Content teams, publishers, SEO agencies	Educators and students
Accuracy positioning	Probability, not certainty; confidence shown per claim	Markets high accuracy claims	Markets detection accuracy for education use