QuillBot
by QuillBot (Course Hero)
FreemiumAI-powered paraphrasing tool with 9 modes, grammar checker, plagiarism detector, summarizer, and co-writer. Free plan includes basic paraphrasing. Premium unlocks unlimited use and all 9 paraphrasing modes.
Overview
QuillBot is an AI-powered writing assistant focused on paraphrasing, grammar checking, plagiarism detection, and summarization. With 9 paraphrasing modes (Standard, Fluency, Formal, Simple, Creative, Expand, Shorten, Academic, Custom), it covers virtually any rewriting need — from academic papers to professional emails.
The free plan is permanently available (no trial expiration) and includes basic paraphrasing with 2 modes and 125 words per paraphrase. Premium unlocks all 9 modes, unlimited paraphrasing, plagiarism checking, and advanced grammar suggestions. It's particularly popular with students, who can get a 25% discount with a .edu email.