Suite of AI tools for paraphrasing, fixing grammar and improving writing.
Updated: July 2026
QuillBot first became known as a paraphrasing tool, but today it’s a fairly complete suite for anyone writing in English as a second language or needing to polish academic texts: it paraphrases, corrects grammar, detects plagiarism, generates citations and summarizes long documents.
Its browser extension is one of its most praised features: it integrates into Gmail, Google Docs and almost any text box, correcting on the fly. For students writing papers in English, it’s one of the most widely used tools in the category.
It has a free plan with a word limit per use, and a premium plan with significant discounts on annual or student/team versions. Worth it for anyone who writes in English regularly; if your content is mostly in another language, other tools may serve you better.