QuillBot AI Detector & Checker — Honest Comparison (2026)
One engine gives you a guess. Three engines give you certainty.
Try Free ScanTL;DR
OmniDetect Advantage
AI detection is a secondary feature, not their core product. Detection accuracy is not their primary investment. Limited free tier (1,200 chars) is too small for real documents.
QuillBot Strength
QuillBot is a comprehensive writing toolkit — paraphrasing, grammar checking, and AI detection in one place. Large existing user base from their paraphrasing tool.
The Verdict
QuillBot uses one detection model. OmniDetect runs GPTZero + Winston AI + Originality.ai in a single scan and shows you when engines agree — and when they don't. That's the difference between a guess and a diagnosis.
Feature Comparison
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| Feature | OmniDetect | QuillBot |
|---|---|---|
| Detection | ||
| Detection Engines | 3 (GPTZero + Winston AI + Originality.ai) | 1 (QuillBot proprietary) |
| Multi-Engine Consensus | ||
| Sentence-Level Highlighting | ||
| Analysis & Insights | ||
| AI Writing Coach (Advisor) | ||
| Edit & Rescan Loop | ||
| Score Delta Tracking | ||
| Verification Certificate | ||
| Shareable Verify Links | ||
| Privacy & Trust | ||
| No Text Storage (SHA-256 only) | ||
| Pricing & Plans | ||
| Free Tier | 3 scans/day | 1,200 chars/scan |
| Starting Price | $9.99 / 7 days | $9.95/month (Premium plan (includes all writing tools)) |
| Weekly Pass Option | ||
Independent Benchmark Data
Based on our 211-sample benchmark with real-world texts. Updated February 2026.
OmniDetect (3-Engine Consensus)
2.5%
FPR
96.1%
TPR
211 real-world samples · 3 independent engines · Updated Feb 2026
QuillBot does not publish independent accuracy benchmarks. OmniDetect provides transparent, verifiable accuracy data.
See full methodology and dataset details →Compare all AI detectors →
Why OmniDetect?
Three engines, one scan
GPTZero, Winston AI, and Originality.ai run in parallel. When all three agree, you know the result is reliable. When they disagree, you know to investigate further.
Know WHY, not just WHAT
Our AI Advisor explains which sentences triggered detection and suggests specific rewrites. Not just a score — actionable guidance.
Pay for a week, not a month
Need it for finals week or a deadline? Our $9.99 7-Day Pass is the only weekly option in the market. No monthly commitment required.
Frequently Asked Questions
Does QuillBot have an AI detector?
Yes, QuillBot includes an AI content detector as part of its writing suite. However, QuillBot's detector uses a single proprietary model. OmniDetect cross-references three independent engines (GPTZero, Winston AI, and Originality.ai) for consensus-based detection that's significantly more reliable than any single engine alone.
QuillBot AI Checker vs OmniDetect — which is more accurate?
QuillBot's AI checker relies on one detection model, while OmniDetect combines three independent engines. In our 211-sample benchmark, multi-engine consensus achieves 96.1% true positive rate with only 2.5% false positive rate. Single-engine tools typically show higher error rates because they depend on one algorithm's strengths and weaknesses.
Is QuillBot's AI Detector free?
QuillBot offers a limited free tier (1,200 characters per scan). OmniDetect provides 3 free full scans per day using the real GPTZero API — not a downgraded model. For full multi-engine consensus analysis, OmniDetect offers a $9.99 7-Day Pass, the only weekly pricing option in the AI detection market.
Can QuillBot detect AI-generated text?
QuillBot can detect some AI-generated text, but as a writing tool company focused on paraphrasing and humanization, AI detection is a secondary feature. OmniDetect is purpose-built for AI detection with three specialized engines running in parallel. When one engine has a blind spot, the others catch it — that's the power of consensus.
How does OmniDetect compare to QuillBot's AI humanizer detection?
QuillBot is best known as an AI humanizer and paraphraser — which creates a fundamental conflict of interest when they also offer AI detection. Why would a company that helps you bypass detection also offer reliable detection? OmniDetect has no such conflict: we don't offer humanization services. Our sole mission is accurate, transparent, multi-engine AI detection.