QuillBot is a writing and research platform hosting free online tools including a state-of-the-art citation generator, grammar checker, plagiarism checker, paraphraser, and summarizing tool.

QuillBot's Paraphrasing Tool helps millions of people rewrite and enhance any sentence, paragraph, or article using state-of-the-art AI. QuillBot is an AI writing collaborator that rewrites full paragraphs and refines content. The company’s mission is to make writing painless. QuillBot is driven by sophisticated AI paraphrasing technology that uses natural language understanding (NLU) to automatically reconstruct the user’s content to improve the clarity of the intended message. More than a million people around the world use QuillBot to improve their writing and deliver a more compelling message. QuillBot is on a mission to make writing painless.

We are starting with our state-of-the-art AI paraphraser which functions as a full-sentence thesaurus. Millions of people already use it to craft sentences, improve fluency, and get over the writer's block. QuillBot is a paraphrasing and summarizing tool that helps millions of students and professionals rewrite any sentence, paragraph, or article using state-of-the-art AI.