Free AI detector
Best ZeroGPT Alternative
ZeroGPT is a free, ad-supported AI detector that returns a percentage "AI/GPT" score with highlighted sentences. It bundles side utilities (word counter, translator, basic paraphraser), offers paid plans that remove ads and raise per-scan character limits, and sells API access separately. Its zero-cost entry point has made it one of the most-searched detector brands.
Why switch from ZeroGPT?
No ad clutter: aicheckr’s results page is the analysis, not banners around it.
A score you can interrogate: every scan includes a written explanation, named warning signals, and a confidence band — not just a bare percentage.
Built-in false-positive protection: scores in the uncertain middle range explicitly recommend human review instead of implying certainty.
More than detection: humanizer, paraphraser, citation verification, and hallucination detection live in the same free account.
ZeroGPT vs aicheckr: side by side
| Feature | ZeroGPT | aicheckr |
|---|---|---|
| Free tier | Yes — generous free scans, ad-supported, character caps per scan | Yes — no ads; 500 words per check without signup, 1,000 with a free account |
| Sentence highlighting | Yes — flags AI-suspect sentences | Yes — each sentence gets its own AI probability |
| Explanation of the score | Percentage output with limited reasoning | Written explanation, named warning signals, and a confidence band on every scan |
| API access | Yes — paid API plans | No public API |
| Extra tools | Word counter, translator, basic paraphraser | Humanizer, paraphraser, citation verification, hallucination detector, grammar checker |
| Pricing | Free with ads; paid plans from a few dollars a month, API billed separately | Free; Pro $10/month with unlimited checks |
Our verdict
ZeroGPT is genuinely free and fine for a quick gut check, and its API plans are cheap. But a bare percentage — surrounded by ads — invites overconfidence. aicheckr gives you the same free entry point with sentence-level evidence, a written explanation, and an honest "this needs human review" band, which matters most exactly when the stakes are high.
Judge it on your own text
Paste up to 500 words — no account needed — and see per-sentence AI probabilities with a confidence band in seconds.
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