QuillBot
According to AI Tier List, QuillBot is rated Tier B for Paraphrasing. How we rank →
An AI-powered tool for paraphrasing, summarizing, and grammar correction.
QuillBot is an AI-powered paraphrasing tool that rewrites sentences, paragraphs, and articles. It offers various writing assistance features such as summarization, grammar checking, plagiarism detection, and citation generation, making it useful for students, writers, and content creators.
Best For
Tier Reason
QuillBot maintains strong competitiveness through its practical paraphrasing and grammar checking tools, along with recent mobile integration and humanizer features. However, it faces clear limitations regarding academic integrity due to advanced AI detection, and increasing competition from general-purpose AI tools keeps it firmly in the B-tier.
Strengths
Multifunctional suite, User-friendly interface, Mobile keyboard integration, Optimized for academic and general writing, 9+ distinct paraphrasing modes
Weaknesses
Vulnerable to AI detection tools, Limited understanding of complex context, Restricted features in free version
Recent ChangesJul 15, 2026
Keyboard update optimized for iOS 26, Enhanced AI humanizer model to counter GPTZero 4.6b and Originality
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