QuillBot
AI writing tool for paraphrasing, grammar checking, summarizing, and translating text — used by 35M+ writers and students
Free tier with limited features; Premium at $13.33/month (annual)
Overview
QuillBot is one of the most widely used AI writing tools in the world, with 35M+ users relying on it primarily for paraphrasing and grammar checking. Its Paraphraser offers multiple rewriting modes that adjust tone, formality, and style while preserving meaning — useful for academic writing, content creation, and language learning.
Key Features
- Paraphraser with 8 modes: Standard, Fluency, Formal, Academic, Simple, Creative, Expand, Shorten
- Grammar Checker with detailed explanations for every correction
- Summarizer for condensing long documents into key points
- AI Detector to check if content will be flagged as AI-written
- Plagiarism Checker (Premium)
- Translation into 45+ languages
- Chrome extension and Microsoft Word add-in
Pricing: Free tier with limited paraphrasing; Premium at $13.33/month (billed annually).
Pros
- 35M+ users — one of the most proven writing tools
- Multiple paraphrase modes for different contexts and tones
- Grammar checker explains errors rather than just correcting
- Affordable premium plan with word processor integrations
Cons
- Paraphrasing can sound mechanical on complex sentences
- AI Detector accuracy varies — not a reliable bypass guarantee
- Summarizer struggles with highly technical content
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