Professional Plagiarism Checker and AI detector
PlagPointer runs enterprise-grade detection – the same engine trusted by 1,000+ universities – without a subscription. Plagiarism and AI content are checked in a single scan. 1 credit covers 250 words and credits never expire, plus you see the exact price before anything is deducted. Subscription checkers typically charge £12 – 15 a month and take back any credits you haven’t spent by the end of the billing period. We don’t. Buy ten credits, use three today and seven next term. Nothing to cancel, nothing forfeited.
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- Plagiarism and AI detection in one scan
- Detailed PDF report saved to your account
- No subscription — credits do not expire
Why Pay-as-you-go beats a subscription:
Subscription plagiarism checkers and AI detectors allocate credits per billing period and take back whatever you haven’t used. Miss a month, lose the credits. Finish your dissertation in March and you’re still paying in August.
| Subscription checkers* | PlagPointer | |
|---|---|---|
| Minimum spend | ~£13/month, ongoing | From 18p a credit (smallest bundle £4.99), pay once when you need it |
| Unused credits | Forfeited at period end | Kept indefinitely |
| Auto-renewal | Yes – you must cancel | None. We can’t charge you again unless you choose to buy more. |
| Cost of one 2,500-word essay | ~£13 (10 of 100 credits used, 90 wasted) | Maximum £4.99 (cheaper for larger bundles) |
| Price shown before scanning | No | Yes, exact to the credit |
The break-even is about 620 credits a year – roughly 155,000 words, or 62 x 2,500 word essays. If you need that much, or more, buy a subscription elsewhere; we’ll say so plainly. If you need less, you’re paying for months you don’t need/use. Most students scan around 25,000 words a year and pay us just £25 for the privilege.
* Comparison based on a leading subscription checker at $16.99/month (100 credits, expiring monthly) and $13.99/month billed annually (1,200 credits, expiring at the end of the term), converted at $1.34/£. Correct at 22nd Sept 2026. Check current prices before relying on this.
Your work stays yours
We don’t tell anyone you’ve used us. No notification to your university, school, tutor or employer. Your document isn’t added to any shared database unless you specifically choose to tick that box – and it’s unticked by default. Some checkers absorb everything you submit into a comparison corpus, which means your own draft can be flagged as a match later. Ours won’t, unless you ask for it. (And, if you do opt in and change your mind, we’ll remove it free of charge.) Your reports stay in your account. Download them whenever – five minutes or five months later.
AI detector features:
Our AI detector uses a gold-standard API with over 99% AI detection accuracy and a false-positive rate of just 0.026%. We’re powered by the world’s leading AI-based text analysis company who has spent 10 years collecting, ingesting and analysing trillions of pages of crawled content and user-sourced content, sourced from thousands of universities and enterprises worldwide to train its model.
Powerful AI detector software that works in 30+ languages with unparalleled AI detection (GPT-5, GPT-4/ChatGPT, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr, Jasper & more)
Three sensitivity levels: Extra Safe for when you may have to justify the result to a student, a parent or a committee. Balanced for everyday checking. Extra Sensitive for hunting AI text that’s been rewritten or run through a “humaniser.” Most detectors give you one fixed threshold and no say in the matter.
A score you can actually explain. Explainable AI Logic shows why a passage was flagged – the phrasing patterns statistically associated with AI writing, and matches against AI-generated text already published elsewhere.
Backed by independent research & repeatedly ranked among the highest-performing AI detectors in independent academic studies, including a 2026 study in which it achieved a mean detection score of 99.6/100 across AI-generated scientific articles.
We won’t score text that’s too short to judge. AI detection needs at least 350 words. Below that, we check for plagiarism only and tell you we can’t reliably assess the AI question – rather than guessing and dressing it up as a percentage.
Detect more than obvious AI copy-and-paste: identify AI-generated text even when it has been edited, paraphrased or mixed with human-written content. The detector is continually updated as AI models and writing tools evolve.
Our underlying technology is trusted by leading organisations and educational institutions including Moodle, Semrush, D2L, Macmillan Learning, Imagine Learning and Oakland University. We do not share your scans with universities/education institutions.
Plagiarism checker features:
PlagPointer doesn’t just return a similarity percentage. It identifies matching sources and distinguishes exact matches, minor alterations and paraphrased content, so you can understand what was found and review it properly. PlagPointer can also optionally check for lookalike characters swapped in to defeat matching, invisible text padding a word count and hidden characters breaking up copied passages.
Searches 60 trillion web sources, 16,000+ open-access journals and, optionally, 1 million+ previously submitted documents.
Uses world-class award-winning API trusted by 1,000+ universities and 300+ organisations.
Scan html, htm, txt, rtf, xml, md, pdf, docx, doc, pptx, ppt, odt, epub, odp, ppsx, pages, xlsx, xls
Your document is not added to our shared comparison database unless you choose that option.
Optional cross-language checking can uncover sources copied from another language and translated.
Quote for your exact document before you scan, depending on options chosen.
1 credit = 250 words – no unfair expensive credits for short documents.
Very simple and easy-to-use interface
Option to exclude references, quotes, citations, table of contents; for HTML – titles/headings, website header/footer; & for code: comments.
Option to scan against 1 million+ internal documents & 20+ code data repositories
Option to adjust sensitivity for faster reports
More than 100 languages supported.
Institution bulk pricing available
Ideal for students, schools, websites, businesses + more
Highly competitive pricing from 18p per 250 words
Option to use credits in wallet or pay for more
Detects identical text, near identical, paraphrasing
Easy to read, downloadable PDF report
Bulk scan up to 5 files at once
Pay only for what you use – no unfair subscriptions
PLUS you can now check real programming assignments. Upload real .py, .js, .java, .cpp, .cs, .go files – 20+ code repositories searched, code comments excludable. Useful for coursework, take-home assessments, and checking whether the freelancer you paid actually wrote it.
Credits from 18p GBP each.
Plagiarism Resources:
Articles
See latest news and topics
Articles covering a range of topics on plagiarism, including famous plagiarism cases, plagiarism in the news and topics to help students.
Ask the Doctor
See guidance from our lecturer.
Guides prepared by a lecturer from one of the UK’s leading universities who has taught undergraduates, postgraduates, GCSE and A level students for 30+ years.
Reviews
Compare plagiarism checkers
Read our honest, straightforward reviews of other online plagiarism checkers available.
Types of plagiarism
Learn more about plagiarism types.
There are many different forms of plagiarism. In this section, we look at the most common – some are obvious, others come as a surprise to many students!
FAQs
Find out more.
Read answers to frequently asked questions on using our AI detector and plagiarism checker software.