The best AI detector in 2026
By Sourabh Singh18 September 20267 min read
Compared on what can be measured, honest about what cannot.
There is no way to independently verify detector accuracy without a labelled corpus that every vendor disputes. So this compares what is verifiable, scale, price, audience, and what the output actually gives you, and is explicit about the rest.
The comparison
| Detector | Price | US visits/mo | Best for |
|---|---|---|---|
| GPTZero | Free tier | 4,517,328 | General use, name recognition |
| ZeroGPT | Free | 4,016,236 | Fast free checks |
| Copyleaks | From ~$9.99/mo | 987,520 | Institutions, plagiarism too |
| Pangram | Usage-based | 499,852 | Accuracy-first claims |
| Originality.ai | From ~$12.95/mo | 364,155 | Publishers and agencies |
| Grammarly | Free | 14,781,728 | In-editor convenience |
| TextAsMe | Free | New | Understanding a flag |
Picks by situation
- Publisher vetting freelancers: Originality.ai. Team seats, scan history, built for the workflow.
- University or school: Copyleaks. Plagiarism and AI in one report, LMS integration.
- Student checking before submission: Scribbr or a free tool. Do not pay for this.
- Writer who got flagged and needs to understand why: a sentence-level tool, because a percentage cannot be argued with.
Why every ranking including this one is soft
Detectors disagree with each other constantly on the same passage. Published accuracy figures are measured on clean model output, which is the easy case. And the whole category shares a false-positive bias against non-native English writers that no vendor has solved.
Try the one that shows its working.
Free, no sign-upCommon questions
It depends on your situation. Originality.ai suits publishers vetting freelancers, Copyleaks suits universities and schools, and a free tool is enough for students checking before submission. No ranking is fully trustworthy because detector accuracy cannot be independently verified.
In this comparison, GPTZero has a free tier, while ZeroGPT, Grammarly and TextAsMe are free. Copyleaks starts from about $9.99 a month and Originality.ai from about $12.95 a month.
Not enough to decide things about people. Detectors disagree constantly on the same passage, published accuracy figures come from clean model output, and the whole category is biased against non-native English writers.
Use a sentence-level tool, because a percentage cannot be argued with. TextAsMe's AI detector is free and is built for understanding a flag.
