QuillBot is a writing-focused AI suite built around its best-in-class paraphraser. It rewrites sentences in several tones (Standard, Fluency, Formal, Academic, Simple, Creative), and pairs the paraphraser with a grammar checker, plagiarism detector, AI detector, summarizer and citation generator in one workspace.
Students, researchers and content teams use QuillBot to polish drafts without changing their voice. Browser extensions for Chrome and Word bring the tools into Google Docs and Microsoft Word, and the Premium plan lifts paraphrase limits and unlocks the strongest rewriting modes.