ZeroGPT review, pricing and verdict

Last updated: 2026-11-04

ZeroGPT is a free AI text detector that checks up to 15,000 characters per scan and highlights sentences it judges machine-written. Its vendor claims accuracy above 98% on internal tests, but a December 2023 peer-reviewed study of 14 detection tools found every one under 80%, and ZeroGPT was not among those that reached 70%.

About ZeroGPT

ZeroGPT is an AI text detector with a free checker on its homepage that accepts up to 15,000 characters per scan. It highlights the sentences it judges to be machine-written and shows a gauge with the share of AI in the whole text. Around the detector sits a toolkit of more than a dozen other tools: a plagiarism checker, paraphraser, summarizer, grammar checker, translator, humanizer, an image detector, a video detector and a ZeroChat assistant.

The honest picture matters more than the feature list. The vendor says its accuracy is pushing toward more than 98 percent on internal evaluations, but it publishes no test set behind that figure. The best independent check we found is Weber-Wulff and colleagues, published in the International Journal for Educational Integrity in December 2023. It tested 14 detection tools, ZeroGPT among them, and concluded that none was accurate or reliable: all scored under 80 percent and ZeroGPT was not among the five that reached 70 percent. Those tools leaned toward calling AI text human, and rewording the text made results worse. The test is nearly three years old and the detector may have changed, so read it as a warning about the category, not a final grade. On Trustpilot the profile (unclaimed) shows 1.2 out of 5 from 111 reviews, read in November 2026. A detector score is a prompt for a conversation with the writer, never proof of who wrote the text.

The tool fits an editor who wants a quick first look at a draft, a student who wants to see how their own writing might be flagged, or a content lead who needs batch checks and a PDF report. Teachers and hiring managers should not use a single score to accuse anyone. The vendor also sells a humanizer that rewrites AI text, which is a conflict of interest worth knowing about when you weigh its detector.

Paid plans raise the character limit far above the free box, add batch file checks and the video detector, and bundle plagiarism words each month. Business, EDU and pay-as-you-go API plans exist as well. If you mainly need rewriting, compare QuillBot. For a detector paired with a humanizer and study tools, see Lynote. If editing is the real job, Grammarly is the closer fit. Many people also paste output from ChatGPT or Claude into a detector, which is exactly where the false-positive risk bites. Not sure which tool fits your task? Describe it to Smart Match and it will point you to a shortlist.

Pricing

Free: $0, with a 15,000-character limit per check on the homepage box. Paid personal plans, read on the vendor pricing page on 2026-11-04 with the annual toggle on: Pro $8.99 a month billed as $107.88 a year ($14.99 month to month), Plus $13.99 a month billed as $167.88 a year ($21.99 month to month), Max $19.99 a month billed as $239.88 a year ($30.99 month to month). Pro and Plus allow 100,000 characters per detection and Max 150,000, with 50, 60 and 75 batch files.

Plagiarism words are a one-time 750 on Pro, 35,000 a month on Plus and 60,000 a month on Max, with credit top-ups for more. Business and EDU plans, Enterprise (contact sales) and a pay-as-you-go API are listed, but their prices were not readable.

Key Features

• Sentence-level AI highlighting: Marks each sentence it judges machine-written and shows a gauge with the percentage of AI in the text, with a free box for first checks.
• Long inputs and batch checks: Paid plans raise the limit to 100,000 characters per detection on Pro and Plus and 150,000 on Max, with 50, 60 and 75 batch files per check.
• PDF detection report: Paid plans generate a PDF report of each detection result, useful for editors who need a record of what was checked.
• Image and video detectors: Separate AI Image Detector and AI Video Detector tools analyse pictures and video frames, with the advanced video detector on paid plans.
• Writing toolkit in one account: Bundles text-checking and rewriting tools such as plagiarism scans and a humanizer, plus the ZeroChat assistant, under one login.
• Pay-as-you-go API: Returns document, paragraph and sentence level detection with probabilities and batched file runs, using an API key and an IP allow-list set in the dashboard.

Pros

• The homepage detector checks passages at no cost and highlights flagged sentences, so a first look needs no purchase.
• More than a dozen tools sit in one account, including a plagiarism checker with up to 60,000 words a month on Max, which saves running two subscriptions.
• A pay-as-you-go API returns sentence-level probabilities and batch runs, which suits teams that screen content in bulk.
• The vendor states that checked text is not saved or used to train its model, and that account data is limited to email, name and a hashed password.

Cons

• Independent accuracy is weak: in the 2023 Weber-Wulff test every tool scored under 80%, and ZeroGPT missed the 70% mark.
• Trustpilot rates it 1.2 out of 5 across 111 reviews on an unclaimed profile, with complaints about human writing flagged as AI.
• The vendor claim of pushing toward more than 98% accuracy rests on internal evaluations, and no test set or false-positive rate is published.
• The same company sells a humanizer that rewrites AI text, so the detector and a tool built to evade detectors share one brand.
• Business, EDU and API prices could not be read from the public pricing page, so team costs need a sales conversation.

Visit ZeroGPT Official Website