GPTZero
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence de
Easy start 1/3Some friction before you start
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
Free tier
Free tierYes
See the source
“For scans over 10,000 characters, create a free account first.”gptzero.me · read 2026-09-28
Credit cardNot verified
WatermarkNot verified
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Commercial useNot verified
CheckedNot checked by hand
Read off the vendor's own pages. Open “See the source” under any row to check the exact wording — these details change often and are not re-checked by hand every day.
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Pricing
Modelfreemium
Starts atNot published
Auto-renewsYes
VendorUnknown
What it is
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
What people use it for
ai detector
Categories
Alternatives compared
See all 9 GPTZero alternatives →Same job, different terms. Unverified rows stay marked — we do not fill them in.
| Tool | Free tier | Card | Watermark | From |
|---|---|---|---|---|
| GPTZerothis tool | Yes | — | — | Not published |
| AIDetector | Yes | Not required | — | Not published |
| Isgen | 12000 word a month | — | — | Not published |
| Quetext | Yes | — | — | Not published |
| SuperHumanizer | Yes | — | — | Not published |
| Originality.AI | — | — | — | Not published |
| Scribbr | — | — | — | Not published |
Listed on ToolVault. Details change often — if something here is out of date, tell us.