QuillBot

QuillBot is a browser-based AI writing assistant for revising, checking, summarizing, translating, and citing text. Users can paste or type content into separate tools, use browser extensions or the mobile keyboard, and choose rewrite modes that change the tone or degree of revision. The free tier is useful for short edits; Premium removes key limits and adds advanced writing checks.

✨ Key Features

• Paraphraser — Rewrite pasted text while preserving its meaning; Free includes Standard and Fluency modes and a 125-word limit, while Premium unlocks unlimited words and modes.
• Grammar Checker — Find and correct grammar issues in the editor, with advanced recommendations available to Premium subscribers.
• AI Humanizer — Adjust AI-generated text toward a more natural flow; Free allows up to 125 words with limited usage; Premium provides full access. Exact usage limits can vary across platforms.
• Summarizer — Turn longer source text into a shorter summary; Premium adds custom summaries.
• AI Detector — Inspect text for AI-generated patterns. Both tiers use the same detector; Free checks one file at a time, Premium up to 20 in a batch. Scores can be wrong, including false positives, and do not prove authorship.
• Plagiarism Checker — Check writing for accidental overlap, with plagiarism-prevention features included in Premium.
• Translator — Translate text inside the QuillBot writing workflow.
• Citation Generator — Create citations from source details for academic or professional writing.
• AI Chat and Image Generator — Use the additional AI tools listed in QuillBot Premium for brainstorming and visual ideation.
• Cross-device writing access — Work through the web app, browser extensions, and the mobile keyboard/widget; supported features can vary by product surface.

💳 Pricing

• Free — $0. Includes paraphrasing up to 125 words in two modes, basic grammar fixes, Humanizer up to 125 words with limited usage, basic summaries, and AI Detector with single-file checking.
• Premium — US$8.33/month billed annually on the October 1, 2026 public US-dollar pricing page; this is an annual monthly equivalent, not a monthly subscription price. Includes unlimited paraphrasing and modes, advanced grammar recommendations, unlimited Humanizer with human-score and tone insights, custom summaries, AI Detector with up to 20 files per batch, and plagiarism prevention. QuillBot also offers monthly and quarterly billing; the exact checkout price varies by region.
• Team Plan — Available as a separate seat-based plan; the official help center directs teams to choose seats and complete checkout, but the reviewed public source did not expose a universal price.

Pricing note — QuillBot says prices can adjust by region and local currency. The annual Premium view displayed 58% off; treat checkout as the source of the final amount.

⚖️ Alternatives Compared

🎯 Use Cases

• Students — Paraphrase notes, summarize readings, and format citations while checking the result against the source.
• Researchers — Review drafts for grammar, possible AI-generated text, and accidental overlap before submission.
• Content teams — Adapt one draft into clearer or more formal versions for different channels.
• Multilingual writers — Translate working text and then refine grammar and tone in the same workflow.
• Editors — Compare rewrite modes to explore concise, fluent, formal, or academic phrasing.
• Mobile writers — Use the keyboard or widget to revise short messages without opening a separate desktop editor.