QuillBotquillbot.com ↗
What it does
AI writing helper: paraphraser, grammar checker, summarizer, AI detector, humanizer, translator, and plagiarism checker in one web app.
Strong fit
Students and writers who mainly need to rephrase, fix grammar, summarize, or polish existing text quickly with a paste-in web tool and browser extension.
Poor fit
Not for long-form content generation from scratch, marketing/SEO workflows, or teams needing brand voice; plagiarism checks are capped even on Premium.
Limitations
Free tier caps paraphrasing at 125 words and 2 modes; plagiarism prevention limited to 25,000 words/month on Premium; trains on user text by default unless opted out (Team Plan exempt).
Privacy & data handling
Uses text inputs to train its AI models by default; opt-out via extension Data & Privacy controls; no training on Team Plan inputs ().
Verified facts
Free plan: paraphrase up to 125 words in 2 modes, basic grammar fixes, Humanize 125 words (6 uses/day), basic summaries, limited AI Detector.
Premium $8.33/mo billed annually ($99.95/yr; $19.95 month-to-month): unlimited paraphrasing in 9 modes, advanced grammar, unlimited AI Detector/Humanizer, plagiarism checks 25k words/mo.
Uses text inputs to train its AI models by default; opt-out via extension Data & Privacy controls; no training on Team Plan inputs ().
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