QuillBot is an AI-powered writing assistant designed to enhance productivity and improve the quality of written content. It offers a variety of tools, including:

1. Paraphraser: Rewrites sentences to achieve the desired tone, vocabulary, or style.
2. Grammar Checker: Identifies and corrects grammatical errors, spelling mistakes, and punctuation issues.
3. Plagiarism Checker: Ensures originality by detecting copied content.
4. Summarizer: Condenses lengthy text into concise summaries while retaining key points.
5. Citation Generator: Automatically formats citations in styles like APA, MLA, and Chicago.
6. Translator: Supports translations in over 45 languages.
7. AI Detector: Identifies AI-generated or refined text​

QuillBot offers both free and premium plans. The free version provides access to many features but with some limitations, while the premium plan includes advanced functionalities like unlimited paraphrasing and faster processing speeds​