QuillBot

What is QuillBot?

QuillBot is an AI writing assistant that provides paraphrasing, grammar checking, summarization, and plagiarism detection, made by QuillBot Inc. The platform operates on a freemium model with browser extensions, mobile apps, and web-based access across Chrome, Edge, Safari, Word, iOS, and Android. Free users access core paraphrasing and grammar tools, while Premium subscribers unlock AI humanization, plagiarism scanning, citation generation, and advanced writing recommendations.

The tool serves students, academics, content creators, marketers, and business professionals. Students use it to rephrase assignments while maintaining meaning and to verify originality. Academic institutions have partnered with the platform—140+ schools rely on it for research writing and citation management. Content creators leverage the paraphraser to generate multiple variations of text, the summarizer to condense lengthy documents, and the AI humanizer to make generated content read naturally. The platform reports 35 million users across 180+ countries with a 4.7/5 rating on the Chrome Web Store.

QuillBot's feature set extends beyond writing refinement. The AI Detector identifies machine-generated text, the Image Generator creates visuals from text prompts, and integrated tools handle PDF editing, file conversion, and image background removal. The Presentation Creator builds slide decks, while the Social Media Post Writer generates platform-specific content. Users can access these tools individually or through a unified workspace that combines writing, design, and generation in one interface. The platform integrates with popular productivity apps and supports file uploads for processing.

Pricing remains simple: the free tier covers essential paraphrasing and grammar checking, while Premium unlocks the full toolset including plagiarism detection, advanced humanization, and priority support. The annual subscription model offers cost savings compared to monthly billing. QuillB