QuillBot
by QuillBot (Course Hero)
FreemiumAI-powered paraphrasing tool with 9 modes, grammar checker, plagiarism detector, summarizer, and co-writer. Free plan includes basic paraphrasing. Premium unlocks unlimited use and all 9 paraphrasing modes.
Overview
QuillBot is an AI-powered writing assistant focused on paraphrasing, grammar checking, plagiarism detection, and summarization. With 9 paraphrasing modes (Standard, Fluency, Formal, Simple, Creative, Expand, Shorten, Academic, Custom), it covers virtually any rewriting need.
The free plan is permanently available (no trial expiration) and includes basic paraphrasing (2 modes, 125 words per paraphrase). Premium unlocks all 9 modes, unlimited paraphrasing, plagiarism checking, and advanced grammar suggestions.
Pricing
Free
$0 /mo
- 125 words per paraphrase
- 2 paraphrasing modes (Standard, Fluency)
- Basic grammar checker
- Summarizer up to 1,200 words
Premium
$9 /mo
- Unlimited paraphrasing
- All 9 modes
- Plagiarism checker
- Advanced grammar
Student
$6 /mo
- All Premium features at 25% discount
Teams
Custom pricing
- Admin dashboard
- Centralized billing
- Priority support. *3-day money-back guarantee on all paid plans.*
Pros & Cons
Pros
Generous permanent free plan (no expiration)
9 paraphrasing modes cover every need
Browser extension, Google Docs, and Microsoft Word integration
Plagiarism checker included in Premium
Very affordable compared to full AI writing tools
Cons
Free plan limited to 125 words per paraphrase
Not a content generator — only rewrites existing text
Plagiarism checker only on Premium
Can sometimes change meaning during aggressive paraphrasing
Less advanced AI than ChatGPT or Claude for creative tasks