Multi-Engine AI Detection

Free AI Detector — Real ZeroGPT Analysis, No Sign-Up

Check your text for AI content for free. Real detection engine, not a simulation.

Verified by 211-Sample Benchmark·94.2% Accuracy · 2.5% FPR · 96.1% TPR·See methodology →

Free scan: we analyze your first ~300 characters

0 / 10,000

|||.pdf, .docx, .txt

Writer:Text Type:

0-30: Likely Human31-70: Uncertain71-100: Likely AI

We keep your document so you can find it again, and you can delete it whenever you want. We do not sell it. Manage or delete

Why Multi-Engine Detection?

Single AI detectors disagree on 15-30% of texts. OmniDetect combines three independent engines for consensus — dramatically reducing false positives.

3 Independent Engines

Your text goes to the engine measured most accurate for its language, and the reasons behind the verdict come with it.

Consensus-Based Scoring

And when the reading is not confident enough to stand behind, we say so instead of printing a number.

Your text, your call

Your document stays in your history until you delete it, and you can delete it at any time. We do not sell it. GDPR compliant.

Best Free AI Detectors Compared

Not all free AI detectors are created equal. Many use outdated models or limit results behind paywalls. Here's how the top free options stack up in 2026.

OmniDetect offers free ZeroGPT-powered scans with real sentence-level highlighting — no sign-up required. Most rival free tiers either cap you at a few thousand characters or quietly run an open-source model behind the scenes. GPTZero's own free tier limits you to 5,000 characters with a single engine.

The key difference is what happens next: our free scan is one real engine on a slice of your text, and upgrading adds Winston AI and Sapling across the whole document. One score is a guess. Three that agree is an answer.

Frequently Asked Questions

Is this AI detector really free?

Yes. You get 3 free scans per day using analysis by a real commercial engine on your first ~300 characters. No credit card or sign-up required for the free preview.

What's the difference between free and paid?

Free scans use one engine (ZeroGPT) on the first ~300 characters. Paid plans unlock all the measured engine (Winston AI + Sapling + ZeroGPT) for full-text analysis up to 50,000 characters.

Do free AI detectors actually work?

Many free detectors use low-quality models. OmniDetect's free tier uses the real ZeroGPT API — a genuine commercial detector, not an open-source imitation.

Stop guessing. Start knowing.

Paste your text above and get multi-engine consensus in seconds.

Try Free Scan