IA Checker vs ZeroGPT: Which AI Detection Suite Should You Use in 2026?

Positioning

These two products are unusually close. ZeroGPT publishes a detector, humanizer, plagiarism checker, paraphraser, grammar checker, summarizer, translator, image detector, word counter, dictionary and email helper. That is close to our own catalogue, so breadth is not the thing that separates us, and any comparison that claims it is should not be trusted.

ZeroGPT's bet is reach: free forever, no account needed to run a check, a public API, batch uploads, and bots inside WhatsApp and Telegram. On availability it is ahead of us in several concrete ways, and the table below says so.

Our bet is what the result is allowed to mean. More than one engine so disagreement is visible, limits printed next to the score, short retention on submitted text, and EU AI Act labelling for the content you go on to publish. If a score in your workflow only ever informs you, that bet is worth little. If it feeds a decision about a person, it is the whole thing.

Scorecard

Counted from the 19 rows in the table below, not asserted separately.

1. 8IA Checker ahead
2. 5Tied
3. 6ZeroGPT ahead

Feature comparison

Feature	IA Checker	ZeroGPT	Ahead
Accuracy
Detection engines	Multiple engines (Advanced and Ultra), with Pangram integration in progress	A single proprietary model, published under the DeepAnalyse name (zerogpt.com)	IA Checker
Sentence-level attribution	Per-sentence signals with the passages that drove the score	Highlights AI sentences with a percentage gauge, per its site (zerogpt.com)	Tied
How a result is framed	An indicator, with the limits and appeal guidance shown next to the score	Its site describes generated PDF reports as proof of AI-free content (zerogpt.com)	IA Checker
Published methodology	Methodology documented on the site; no peer-reviewed publications	Describes a multi-stage deep learning method trained on proprietary datasets (zerogpt.com)	Tied
Models named as detectable	ChatGPT, Claude, Gemini and other current families	Lists ChatGPT, GPT-5, Gemini, Grok, Claude, DeepSeek and LLaMA (zerogpt.com)	Tied
Coverage
Breadth of the suite	Detection, humanizer, plagiarism, paraphrase, grammar, summarize, translate, EU labelling	The same ground plus a chatbot, background remover, citation generator and more (zerogpt.com)	ZeroGPT
Image detection	Dedicated image detection route	An image detector is part of the published suite (zerogpt.com)	Tied
Video detection	Dedicated video detection route	Not part of the published suite	IA Checker
Batch file upload	Documents are checked one at a time	Batch upload of multiple files is advertised (zerogpt.com)	ZeroGPT
Public API	No public API	A pay-as-you-go API is published for detection and the writing tools (zerogpt.com)	ZeroGPT
Messaging integrations	None	WhatsApp and Telegram bots are advertised (zerogpt.com)	ZeroGPT
Pricing
Account needed to run a check	Free checks without an account; paid tools need one	The homepage detector runs without an account (zerogpt.com)	ZeroGPT
Free tier	Free checks up to 20,000 characters	A free plan advertised as free forever, with a 15,000-character box on the homepage (zerogpt.com)	ZeroGPT
Paid plans	€4.90 per month for 100,000 words, 25,000 characters per check	Personal, Business and EDU tiers plus enterprise quotes are listed on its pricing page (zerogpt.com)	Tied
Privacy
Retention of submitted text	Kept only for the duration of the requested operation unless you save it	Its privacy policy does not state a retention period for submitted text (zerogpt.com)	IA Checker
Training on submissions	Not used for model training without express opt-in	Its policy describes the uses it reserves over collected information (zerogpt.com)	IA Checker
Hosting region	European Union	Not stated in its published policy (zerogpt.com)	IA Checker
Compliance
EU AI Act labelling	Built-in labelling tool with the official Article 50 disclosure icons	Not part of the published suite	IA Checker
GDPR posture	EU-established, GDPR-first	Its published policy does not state an EU establishment or a GDPR legal basis (zerogpt.com)	IA Checker

The same toolkit, a different bet

Most comparison pages in this market open by claiming the writer has more features than the competitor. We cannot claim that here. ZeroGPT publishes a detector, humanizer, plagiarism checker, paraphraser, grammar checker, summarizer, translator, image detector, word counter, dictionary and email helper, which is close to our catalogue line for line, and it adds a chatbot, a background remover and a citation generator on top.

On availability it is ahead of us in ways that are easy to verify: the homepage detector runs without an account, batch uploads are advertised, there is a published pay-as-you-go API, and there are bots inside WhatsApp and Telegram. We have none of those four. The scorecard above reflects it.

So the question is not who has more boxes. It is what you are buying when the two products do the same thing, and that comes down to how much weight the result is meant to carry.

What a detection report can and cannot prove

This is the real divergence. ZeroGPT's site presents its generated PDF reports as proof of AI-free content. We take the opposite position, and it is written into how our pages are built: a score is a probabilistic indicator, it does not establish who wrote a text, and no report we produce should ever be filed as evidence.

The distinction is not academic. A document labelled as proof travels: into an academic integrity file, into a hiring decision, into an HR meeting. Once it is framed that way, the person on the other side has to disprove a number, which is close to impossible for anyone who simply wrote clearly and kept no drafts.

If your workflow only ever uses a score to decide what to read more carefully, this difference costs you nothing and you should weigh the rest of the table instead. If a score in your organisation feeds a decision about a person, it is the only row that matters.

What happens to the text you paste

We keep submitted content only for as long as the requested operation needs it unless you explicitly save it, we do not use it for model training without express opt-in, and processing happens in the European Union. Those are commitments we can be held to.

ZeroGPT's published privacy policy sets out what it collects at account level and the situations in which it may share information. Read it yourself rather than trusting our summary. What we can say is what it does not currently contain: a stated retention period for submitted text, a named hosting region, or a stated GDPR legal basis.

For an individual checking their own draft this may not change your choice. For a school running student work, or a company running candidate material, an unstated retention period on other people's writing is usually a procurement problem before it is a preference.

IA Checker vs ZeroGPT FAQ

Is ZeroGPT accurate?

ZeroGPT publishes accuracy claims for its own model on its site. No detector can support a general accuracy claim for every document and every model. On iachecker.com we take a different approach: more than one engine, disagreement made visible, and the limits printed next to the score. That will not make any single percentage win every study, but it makes it harder to treat one number as settled. Still run the same human-written and model-written samples through both before you standardise.

Can a detection report be used as proof that writing is AI-free?

No. A report records what a model scored, not who wrote the text. ZeroGPT's site describes its PDF reports as proof of AI-free content; we do not make that claim about ours and think it should not be made. Treat any such document as one input a person weighs, never as evidence that settles the question.

Which one is more usable for free?

ZeroGPT, on availability. Its homepage detector runs without an account and its free plan is advertised as free forever. Our free checks run up to 20,000 characters, and the surrounding tools need an account. If a free check with no sign-up is the whole requirement, that is a genuine point in its favour.

Does IA Checker offer an API or batch uploads?

Not today. ZeroGPT publishes a pay-as-you-go API and advertises batch file upload; we offer neither. If you need to check volume programmatically, that is a real reason to choose it over us right now.

IA Checker vs ZeroGPT: which should I choose?

The toolkits overlap almost completely, so decide on what the result is for. Choose ZeroGPT for the widest free access, batch checks and an API. Choose IA Checker when the score carries weight: more than one engine, limits shown alongside the result, short retention, EU hosting and EU AI Act labelling.

Read next

• How AI humanizers work
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• Try the AI detector
• All comparisons