QuillBot's original and still-signature feature is paraphrasing: paste in a sentence or paragraph and get it reworded in a chosen style, from formal to fluent to shorten, a genuinely different starting point than the draft-from-scratch generators most of this category leads with. That paraphrasing engine is still what most people associate with the brand.
Grammar checking, a summarizer, a citation generator, and a plagiarism checker have all been added around that core over time, turning QuillBot into a broader writing suite rather than a single-purpose tool, though paraphrasing remains the feature most reviewers and students mention first. It's owned by Learneo, the company behind Course Hero, and its user base leans heavily toward students rewording source material for essays and assignments.
A functional free tier covers basic paraphrasing and grammar checks; the roughly $10-a-month Premium plan raises word limits, unlocks more paraphrasing modes, and adds the full plagiarism and citation toolset. That student-heavy audience also means QuillBot gets used in academic-integrity conversations more than most tools on this list, worth knowing going in.
