IA Checker vs Scribbr: Which AI Detector Should You Use in 2026?

Positioning

Scribbr's AI detector is a student-first free tool. Its page advertises unlimited free checks up to 1,200 words per submission, no account required, paragraph-level feedback, and a four-way classification of human-written, AI-generated, AI-refined and mixed cases.

IA Checker is a broader workspace. Free checks go further in character length, but the surrounding tools (humanizer, plagiarism, translation, labelling) are the product, not a free detector alone.

Scribbr's detector page states submissions remain private and are not stored or shared. That is a strong published privacy claim for the free checker. Scribbr's wider privacy policy for editing orders describes longer document retention; those are different products on the same brand.

Scorecard

Counted from the 21 rows in the table below, not asserted separately.

1. 7IA Checker ahead
2. 9Tied
3. 5Scribbr ahead

Feature comparison

Feature	IA Checker	Scribbr	Ahead
Accuracy
Detection engines	Multiple engines (Advanced and Ultra), with Pangram integration in progress	A Scribbr AI checker; its page also points readers to QuillBot's detector for a more advanced option (scribbr.com)	IA Checker
AI-refined versus AI-generated classification	Scores and sentence signals; no four-way AI-refined taxonomy	Its site describes distinguishing human-written, AI-generated, AI-refined and mixed writing (scribbr.com)	Scribbr
Paragraph-level feedback	Per-sentence signals with the passages that drove the score	Paragraph-level feedback is marketed on its AI detector page (scribbr.com)	Tied
Published accuracy honesty	Limits printed next to results; no universal accuracy headline	Its FAQ states no detector is fully accurate and cites research finding top tools far below 100% (scribbr.com)	Tied
Models named as detectable	ChatGPT, Claude, Gemini and other current families	Its page names ChatGPT, Gemini, Copilot and GPT-4 among detectable tools (scribbr.com)	Tied
Coverage
Text detection	Yes	Yes	Tied
Image and video detection	Dedicated image and video detection routes	Not part of the published AI detector page (scribbr.com)	IA Checker
Languages	Calibrated primarily for the languages the product documents on-site	Its site lists English, German, French and Spanish (scribbr.com)	Tied
Plagiarism and citations ecosystem	Plagiarism review inside the paid workspace	Scribbr is built around plagiarism checking, citations and proofreading alongside the detector (scribbr.com)	Scribbr
Document length on free checks	Free checks up to 20,000 characters	Unlimited free checks, capped at 1,200 words per submission on its AI detector page (scribbr.com)	IA Checker
Pricing
Account needed to run a check	Free checks without an account; paid tools need one	Its site states no sign-up is required for the free AI detector (scribbr.com)	Scribbr
Free tier	Free checks up to 20,000 characters	Unlimited free AI checks advertised, 1,200 words per submission (scribbr.com)	Scribbr
Paid upgrade path	€4.90 per month for 100,000 words, with the wider writing toolkit	A Premium AI Detector is mentioned for higher GPT-4 accuracy; broader Scribbr services are sold separately (scribbr.com)	IA Checker
Privacy
Retention of detector submissions	Kept only for the duration of the requested operation unless you save it	Its AI detector page states submissions remain private and are not stored or shared (scribbr.com)	Tied
Training on submissions	Not used for model training without express opt-in	Its AI detector page does not describe training on detector submissions (scribbr.com)	Tied
Hosting region	European Union	Hosting region for the AI detector is not stated on the detector page (scribbr.com)	IA Checker
Workflow
Academic writing adjacent tools	Humanizer, plagiarism, translation, grammar and labelling	Plagiarism checker, citation generator and proofreading are the brand's core adjacent tools (scribbr.com)	Scribbr
Public API	No public API	No public AI detector API is advertised on the detector page (scribbr.com)	Tied
Institutional LMS integrations	None published	None advertised on the AI detector page (scribbr.com)	Tied
Compliance
EU AI Act labelling	Built-in labelling tool with the official Article 50 disclosure icons	Not part of the published AI detector	IA Checker
GDPR posture	EU-established, GDPR-first	Scribbr publishes privacy commitments for its services; detector-specific GDPR legal bases are not detailed on the detector page (scribbr.com)	IA Checker

Free student detector versus paid workspace

Scribbr's AI detector is easy to recommend when the job is a quick student self-check. Unlimited free runs, no account, and a 1,200-word cap per submission cover most essay drafts without a checkout flow.

IA Checker is for people who keep going after the score: rewrite the flagged passage, check sources, translate, or add an EU AI Act label. The free character allowance is larger per check, but the product value is the workspace around detection.

If all you need is a free second opinion before submitting a paper, Scribbr's published free surface is hard to beat. If detection is the start of editing work, breadth matters more than unlimited short free scans.

AI-refined writing is a useful distinction

Scribbr's four-way classification (human, AI-generated, AI-refined, mixed) matches how students actually write in 2026: a human outline polished by a model, or a model draft rewritten by hand. That taxonomy is a genuine product advantage on their public page.

We show sentence-level signals and multi-engine disagreement instead. That is a different kind of nuance: not how the AI was used in the process, but whether independent detectors agree on the surface of the text.

Neither framing proves misconduct. Both can still help a writer decide which paragraphs to revise before someone else reads them less charitably.

Privacy claims need the right page

Scribbr's AI detector page states that submissions remain private and are not stored or shared. For a free paste-in checker, that is one of the clearer public commitments in this market.

Scribbr's wider privacy materials for editing orders describe documents kept for months on their servers. That is about proofreading orders, not necessarily the free detector. Do not collapse the two into one claim.

We keep detector submissions only for the operation unless you save them, and we process in the EU. If hosting region is the procurement question, that is still our clearer published answer.

IA Checker vs Scribbr FAQ

Is Scribbr's AI detector accurate?

Scribbr's own FAQ states that no detector is fully accurate and cites research finding even the best tools well below 100%. On iachecker.com we agree with that honesty, then go further: more than one engine, disagreement made visible, and limits printed next to the score. Use Scribbr for a quick free self-check; use iachecker.com when the result has to survive a harder look.

Can Scribbr tell AI-refined writing from fully AI-generated text?

Yes, according to its AI detector page. It describes classifying sections as AI-generated, AI-refined, human-written, or combinations of those. IA Checker focuses on multi-engine scores and sentence signals instead of that four-way taxonomy.

Does Scribbr store text submitted to the AI detector?

Its AI detector page states submissions remain private and are not stored or shared. Scribbr's privacy materials for editing orders describe longer retention for proofreading documents. Treat those as separate product surfaces.

Which is better for students, Scribbr or IA Checker?

For a quick free self-check before submission, Scribbr's published unlimited free detector is the lighter option. For longer documents, rewriting, plagiarism review, translation or EU AI Act labelling, IA Checker covers more of the post-score work.

IA Checker vs Scribbr: which should I choose?

Choose Scribbr for unlimited free, no-sign-up AI checks with AI-refined classification in a student academic brand. Choose IA Checker for a multi-engine EU-hosted workspace with labelling and writing tools around the score.

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