QuillBot is an AI paraphrasing and grammar tool with nine rewriting modes and a built-in plagiarism checker. Compared on paraphrasing capability and free-tier generosity, it offers more core functionality at no cost than any comparable writing tool.
Best used for
Blog posts, marketing copy, email campaigns, product descriptions, and long-form content.
Who it's for
- Individuals looking for fast, capable AI assistance
- Small businesses wanting to automate repetitive work
- Teams that need a reliable AI they can trust
Free
Free
- Paraphrase up to 125 words
- 2 paraphrase modes
- Basic grammar fixes
- 6 Humanize uses/day
- Basic summaries
- Limited AI Detector
Premium
£4/mo
- Unlimited paraphrasing
- 9 paraphrase modes + custom
- Advanced grammar
- Full Humanize access
- Custom summaries (6,000 words)
- 25,000-word plagiarism checker
- Tone insights
Always check the provider's site for the latest pricing.
Free tier availableYes
API accessNo
Open sourceNo
Enterprise readyNo
GDPR compliantNo
MFA supportedNo
Trains on your dataNo
SOC 2 certifiedNo
ISO 27001No
Pros
- +Free tier paraphrases up to 125 words with no time limit
- +9 paraphrase modes including Formal, Simple, Creative, and Expand
- +Premium at £4/mo (annual) is the lowest price in the writing category
- +Plagiarism checker and AI Detector bundled with Premium
Cons
- −GDPR and SOC2 not confirmed from official sources
- −Free tier capped at 125 words per paraphrase — limiting for longer content
- −Focused on paraphrasing — not a full-document AI writing assistant