The short answer
ZeroGPT puts its AI detector first and lists a wide set of writing tools in many languages. Plagiarism Checker Plus puts its plagiarism checker first, links every match to its source, and has an AI detector beside it. Both have free use. They are separate detectors, so their AI scores can differ.
Head-to-head table
Our column comes from our own product and pricing page. The ZeroGPT column comes from the pages linked in the sources.
| Attribute | Plagiarism Checker Plus (ours) | ZeroGPT |
|---|---|---|
| Free allowance | First plagiarism check and first AI check free, up to 1,000 words each. A free account includes 3,000 words a month. | A free plan, shown as “$0 forever” with no credit card needed. The detector box on the home page shows a 15,000-character counter. Other free limits are not stated on the pages we read. |
| Sign-up | Not needed for the first plagiarism check or the first AI check. | The AI detector box is on the public home page. Whether it needs an account is not stated on the pages we read. The plagiarism checker page says “Sign Up to Start”. |
| Plagiarism check | Yes. We have no database of other students’ submitted papers. | Yes, after creating an account. Its page says text is compared with “billions of online sources” and ZeroGPT’s internal database. |
| Source links | Yes. Every matching passage is linked to its source. | Its FAQ says you review matched sources after a scan. Whether each match links to its source is not stated on the pages we read. |
| AI detection | Yes. An overall score. We publish no accuracy figure. | Yes. A gauge shows the percentage of AI in the text. Its home page shows 98.4% detection accuracy and under 1% false positives. Those are its own figures. |
| Sentence-level detail | Yes. A likelihood for every sentence. | Sentences it reads as AI-written are highlighted. Its API description lists results at document, paragraph and sentence level, with probabilities. |
| Grammar and citation tools | Grammar checker. Citation generator for APA, MLA, Chicago, Harvard, IEEE, AMA and ACS. | Grammar checker. Citation generator for “APA, MLA, Chicago and more”. Also a summarizer, translator, word counter and dictionary. |
| Integrations | Google Docs add-on and Chrome extension. No LMS integration. | WhatsApp and Telegram. For LMS, its FAQ says “Yes, via API”. A Google Docs add-on or browser extension is not stated on the pages we read. |
| API | REST API, included in the Team and Enterprise plans. | Yes. Listed as pay as you go, with an account balance you top up. |
| Starting price | Student plan: $4.99 a month, or $3.99 a month billed annually. 60,000 words a month. | Paid Personal and Business / EDU plans exist, with 40% off for annual billing. The prices are not stated in the page text we read. |
| Languages | The web app and the reports are in English. | Its FAQ says all available languages are supported across all tools. The plagiarism checker page says 190+ languages. The site itself is offered in six languages. |
Limits and prices change. Read each site on the day you sign up.
Two different starting points
The clearest difference is what each product puts first.
ZeroGPT’s home page opens on the AI detector. Around it sits a long list of other tools: plagiarism checker, grammar check, summarizer, translator, word counter, dictionary, email helper, citation generator, and detectors for AI images and AI video. It is built as a toolkit with the AI detector at the front.
Our home page opens on the plagiarism checker. The AI detector, grammar checker and citation generator sit beside it. We cover fewer kinds of task. We do not translate, summarize, or check images or video.
So the first question is what you came to do. If the job is “does this text match a source, and which one?”, start with a plagiarism check. If the job is “how does a detector read this text?”, either AI detector will give you a reading.
How each shows an AI result
ZeroGPT’s home page says every sentence written by AI is highlighted, with a gauge showing the percentage of AI in the text. It also says a PDF report is generated for every detection. Its FAQ describes the output as an overall score plus highlighted passages that appear AI-like.
Ours gives an overall score and a likelihood for every sentence, so you can see which sentences scored high and which scored low, not only which ones crossed a line.
Two details from ZeroGPT’s FAQ are worth knowing whichever tool you use:
- Length matters. It says to analyse at least 150 to 200 words, and that 500 to 1,000 words or more “improves stability”. Our AI detector needs at least 50 words. Very short text gives any detector little to work with.
- Human writing can be flagged. It says “highly polished, formulaic, or low-entropy writing can resemble AI”. That is true of AI detectors in general, ours included. See AI detector false positives.
ZeroGPT publishes accuracy figures on its home page, and its FAQ words them as “pushing toward >98% on internal evaluations”. We publish none. We would rather you read a score as a likelihood than trust a headline number, from us or from anyone. Do AI detectors work? explains why.
The plagiarism check
ZeroGPT’s plagiarism checker page says “Sign Up to Start”. After creating an account you upload a document. The page says it is compared with billions of online sources and ZeroGPT’s internal database, and that the report highlights similar text, gives a similarity percentage and can be downloaded as a PDF. It lists support for 190+ languages.
Ours runs once without an account, up to 1,000 words, and links every matching passage to its source. That link is the part we care most about. A percentage tells you how much matched. The source tells you what to do: quote it, paraphrase it properly, or cite it. See how to interpret a plagiarism report.
We could not confirm from ZeroGPT’s pages whether each match in its report links to the source. Its FAQ says you “review matched sources”, so sources are shown in some form. Check a report yourself before you rely on either tool.
Price
Ours. The Student plan is listed at $4.99 a month, or $3.99 a month billed annually, with 60,000 words a month. The Personal plan is $12.99 a month, or $8.49 billed annually, with 200,000 words a month. Paid plans add longer documents and folders. API access is in the Team and Enterprise plans. The full list is on our pricing page.
ZeroGPT. Its pricing page shows a free plan, Personal plans, Business / EDU plans, an Enterprise option with a custom quote, and API plans billed as pay as you go. It says annual billing is 40% off. The plan prices load in the browser and were not in the page text we could read. We will not guess them. Open its pricing page to see the current numbers.
Because we could not read ZeroGPT’s prices, this page does not say which tool costs less.
When ZeroGPT is the better choice
Choose ZeroGPT, not us, in these cases.
- Your text is not in English. ZeroGPT says it supports all available languages across its tools, and 190+ for plagiarism. Our web app and reports are in English.
- You want to check an image or a video. ZeroGPT lists an AI image detector and an AI video detector. We check text only.
- You want a longer free AI check. Its home page box counts up to 15,000 characters. Our free check without an account stops at 1,000 words.
- You also need to translate or summarize. ZeroGPT has both tools in the same account. We have neither.
- You want to use it from a chat app. ZeroGPT says it is available in WhatsApp and Telegram. We are not.
- You want an API you pay for as you go. ZeroGPT lists a pay-as-you-go API that you fund from an account balance. Our API comes with the Team and Enterprise plans.
When Plagiarism Checker Plus is the better choice
Our tool may suit you better in these cases. This is our view of our own product.
- Plagiarism is your main question. The first check needs no account, and every matching passage is linked to its source. ZeroGPT’s plagiarism checker asks you to sign up first.
- You want a likelihood for every sentence. Our AI detector shows one for each sentence, next to the overall score.
- You write in Google Docs or check text in Chrome. We have a Google Docs add-on and a Chrome extension. We did not find either on the ZeroGPT pages we read.
- You need a citation style beyond the common three. Our citation generator covers APA, MLA, Chicago, Harvard, IEEE, AMA and ACS. ZeroGPT lists “APA, MLA, Chicago and more” without naming the rest.
In several areas ZeroGPT simply covers more ground than we do. If language coverage or media detection matters to you, that settles it.
If the two detectors disagree
They will, sometimes. Two detectors built by two companies do not have to agree, and a gap between them is not a fault in either one. It is a reminder of what a score is.
- Neither score is proof. Each is an estimate of how likely it is that AI wrote the text.
- Neither predicts a school’s system. If your school uses its own detector, that is a third system with its own result. See ZeroGPT vs Turnitin.
- Your record of writing matters more. Drafts, notes and version history show how the text came to be. See how to prove you didn’t use AI.
If you used AI in a course that allows it, say so and cite it. How to cite ChatGPT shows the format.
What we do not know and did not test
- Accuracy. We did not run the same texts through both tools. We do not know which AI detector is right more often or which plagiarism check finds more.
- ZeroGPT’s paid prices. They were not in the page text we read.
- ZeroGPT’s free limits, beyond the 15,000-character counter on the home page, and whether the detector needs an account.
- Whether ZeroGPT’s plagiarism report links each match to its source.
- Whether ZeroGPT has a Google Docs add-on or browser extension. We did not find one on the pages we read. That is not proof it has none.
- ZeroGPT’s privacy practices. Its FAQ says checked text is not saved, published or used to train its model. We did not review its policy. Read it before you upload.
- What happens after today. This page shows what we could read on 10 October 2026.
Sources
ZeroGPT’s own website, read on 10 October 2026.
- ZeroGPT home page: detector box, highlighted sentences, its accuracy figures, tool list, WhatsApp and Telegram.
- ZeroGPT FAQ: how the detector works, text length, languages, API, LMS, privacy.
- ZeroGPT pricing: free plan, plan types, annual discount, pay-as-you-go API.
- ZeroGPT plagiarism checker: sign-up, sources compared, report, languages.
- Plagiarism Checker Plus: our own plagiarism checker, AI detector, grammar checker, citation generator, API and pricing pages.