QuillBot

QuillBot Review: The Most Complete AI Paraphrasing and Writing Suite

QuillBot's market position is unique: it is not primarily a grammar checker but a text transformation platform — and its paraphraser is the most used AI rewriting tool for students and content creators worldwide. The grammar checker, summariser, and citation generator have grown around this paraphrasing core to form a complete writing suite.

Paraphrasing Modes

QuillBot's paraphraser offers eight modes that produce genuinely different rewriting outputs. Standard mode makes moderate vocabulary and structure changes. Fluency mode prioritises natural-sounding text. Formal mode increases professional register. Simple mode reduces complexity for broader audiences. Creative mode introduces more radical restructuring. Expand adds contextual detail and elaboration. Shorten condenses text to core meaning. Custom mode allows setting the aggressiveness of the rewrite manually.

For students who need to integrate source material into an essay without direct quotation, content marketers adapting the same content for different platforms, and writers who produce repetitive text in long documents, these modes provide practical, immediate value.

Grammar Checker

QuillBot's grammar checker handles standard grammatical corrections — subject-verb agreement, tense consistency, article usage, comma placement — with good accuracy. It integrates with Chrome as a browser extension and with Microsoft Word and Google Docs via add-ins. It is less powerful than Grammarly for stylistic suggestions and tone analysis, but covers the correctness baseline adequately for most writing needs.

Citation Generator

The citation generator accepts a URL, DOI, ISBN, or article title and automatically generates formatted citations in APA 7th edition, MLA 9th edition, Chicago, or Harvard style. For students managing multiple sources across a research paper, this eliminates the manual formatting that consumes hours of reference management time.

Score: 8.6/10 — Best AI paraphrasing and rewriting tool; grammar checking quality below Grammarly for style-focused improvement.