Built for writers who care about the truth
Plagiarism Checker Plus is one workspace for plagiarism checking, AI detection and citations — for students, teachers and writers who would rather know than guess.
Keep writing honest, without slowing it down
Academic integrity is not a number. It is a habit: citing what you borrowed, writing in your own voice, knowing when a sentence is too close to a source. Tools should help people build that habit, not just hand out scores.
So we built the report we wished we had as students: sentence-level, source-aware, fair and fast.
What we believe
Accuracy over hype
We explain how our detectors work, where they struggle and what the numbers mean. No black boxes, no inflated accuracy claims.
Privacy by default
Your text is not training data. We never sell or share it, and signed-in checks stay in your own history, where you can delete them.
Built for writers
A flagged sentence on its own is not useful. We show the source, the matching text and a way to cite or fix it.
Honest pricing
Simple monthly word allowances, a free tier you can actually use, and no surprise charges. You upgrade when you need more.
How we got here
The idea
Educators and engineers tired of plagiarism tools that gave a number and called it a day. We wanted a report that explains itself.
Sentence-level first
Sentence-level highlighting and source-aware scoring came first, so every match can be checked by a person.
AI changed the question
When generative AI went mainstream, "did you copy this?" became "did anyone actually write this?". We added AI detection to the same report.
Wherever you write
The web app, a Chrome extension, a Google Docs add-on and an API, plus workspaces for schools and universities.
Try it on a real piece of writing
Free, no sign-up for your first check, sentence-level results.