- Premium plagiarism checker: Check text for matching material inside QuillBot Premium.
- Source review: Inspect highlighted matches and their linked sources.
- Writing-suite access: Use paraphrasing, grammar, citations and summarization in the same subscription.
- Originality tools: Access separate plagiarism and AI-detection tools without treating them as the same test.
- Multiple billing terms: Choose monthly through two-year Premium billing.
Quillbot Plagiarism Checker
AI-powered plagiarism detection with multilingual support and citation guidance
Updated August 11, 2026
Quillbot Plagiarism Checker Overview
QuillBot’s plagiarism checker sits inside its wider writing suite, alongside paraphrasing, grammar, citations, AI detection, and summarization. Users can review highlighted matches and move between source checking and revision tools in one workflow.
It is a personal writing aid rather than an institution-managed submission repository. Its AI detector and plagiarism checker measure different things, so neither result should be treated as a final academic verdict.
Key Features
Pricing
| Plan | Price | What is included |
|---|---|---|
| Monthly | $19.95/month | QuillBot Premium writing suite |
| Quarterly | $39.95 every 3 months | Displayed as $13.31 per month |
| Semiannual | $79.95 every 6 months | Displayed as $13.33 per month |
| Annual | $99.95/year | Displayed as $8.33 per month |
| Two-year | $159.95 every 2 years | Displayed as $6.66 per month |
Pricing source: official pricing page.
Pros
Compared with |
Why this product may fit better |
|---|---|
| Turnitin | QuillBot can be bought directly by an individual and combines checking with paraphrasing, grammar and citations. Turnitin is stronger for schools, while QuillBot is easier for a personal writing workflow. |
| Grammarly | QuillBot places paraphrasing, summarizing and plagiarism checks in one Premium suite. Grammarly has stronger live editing, while QuillBot gives rewriting tools more space. |
| Quetext | A QuillBot Premium plan covers more than originality checks, and longer billing terms lower the advertised monthly equivalent. Quetext offers a cheaper checker-only route for people who do not need the larger suite. |
| GPTZero | QuillBot includes creation, rewriting and originality tools in one account. GPTZero focuses more closely on detection and authorship signals, while QuillBot can carry the same draft through more writing tasks. |
Cons
Compared with |
Where this product may fall short |
|---|---|
| Turnitin | Turnitin connects to school assignments and checks institutional collections. QuillBot's personal checker does not provide the same instructor controls or academic repository. |
| Grammarly | Grammarly supplies writing suggestions across more everyday apps and pages. QuillBot has extensions too, but several of its advanced tools still pull users back into the QuillBot workspace. |
| Quetext | Quetext offers a continuing free checker and a $9.99 checker-only plan. QuillBot's plagiarism checker is part of Premium, so users pay for the whole suite. |
| GPTZero | GPTZero includes free starter access for detection and publishes clear monthly word allowances. QuillBot's lowest advertised monthly amount requires a two-year commitment. |
Reviews
- AI Detect Plus review: The review likes QuillBot's browser and Google Docs workflow and the ability to move between plagiarism and paraphrasing tools. It also reports slow support and difficult refund experiences. The publisher sells a competing product.
- GPTZero review: GPTZero's competitor-published review discusses QuillBot's AI detector, paraphraser, summarizer and plagiarism checker. It reports useful source highlighting but warns that AI detection may be tuned too aggressively and produce false positives.
- Zulie Rane review: The writer questions the value of the plagiarism checker for professional writing and says the broader tool set did not justify the subscription for her use. This is one author's opinion, not a user-rating aggregate.
