Quillbot
Set of AI writing tools built around a paraphraser, with grammar checking, humanizing, AI detection, plagiarism checks, summaries and chat.
- Free plan
- Verified free plan
- Paid from
- Not yet confirmed
- Known for
- Paraphraser modes, AI Humanizer, AI Detector
- Your data
- Individual accounts: inputs are used for training and personalization by default.
What makes Quillbot different
AI paraphraser with grammar, plagiarism and AI-detection tools
01
Paraphraser modes
Rewrites text in one of nine modes, such as Formal, Academic, Simple, Expand or Shorten, or a Custom mode.
Use it for: Rewording a paragraph for a different audience or length.
How to start
- Go to the Quillbot Paraphraser
- Type, paste or upload your text into the left-hand box
- Select a mode (Standard, Fluency, Formal, etc.)
- Click the “Paraphrase” button
No plan limit statedhelp.quillbot.comchecked 2026-10-1102
AI Humanizer
Rewrites AI-assisted drafts to remove stiff phrasing while keeping the meaning.
Use it for: Making an AI-drafted email or report read more naturally.
How to start
- Paste your AI text
- Humanize instantly
- Tweak further with synonym swaps, advanced mode or minor edits
No plan limit statedquillbot.comchecked 2026-10-1103
AI Detector
Scores from 0 to 100% how likely a text was written by AI, with explanations.
Use it for: Checking a draft before submitting it where AI use is restricted.
How to start
- Paste or type the text (at least 80 words)
- Select "Detect AI"
- Read the explainer cards
No plan limit statedquillbot.comchecked 2026-10-1104
Plagiarism Checker
Compares your text with a source database and reports matches, missing citations and source links.
Use it for: Checking a paper for missing citations before submission.
How to start
- Get a Premium subscription
- Upload files (.txt, .pdf, .docx or .html)
- View the report
On Premium, Teamquillbot.comchecked 2026-10-11
Limits
How much you can really use it, in the official pages' own words. Limits change often; check the date on each answer.
- Free plan limitsWhat the free plan stops you doing: minutes, credits, meetings or features.
- Paraphrasing up to 125 words in 2 modes, summaries up to 1,200 words, 20 AI Chat queries a day.help.quillbot.comchecked 2026-10-11
Free plan
Privacy and your data
What happens to what you type, upload or make, from the provider's privacy and terms pages. Business plans often differ; the plan is named under each answer.
- Used to train AIWhether what you type, upload or record is used to train or improve the provider's models by default.
- Individual accounts: inputs are used for training and personalization by default.help.quillbot.comchecked 2026-10-11
Plans: Free, Premium
- Team Plan: text inputs are not used for training.help.quillbot.comchecked 2026-10-11
Team plan
Cost
- Free planA free plan that is not time-limited. Trials are listed separately.
- Supportedhelp.quillbot.comchecked 2026-10-11
Free plan
Plans
Free
Free plan
- $0.00 / month
Premium
Paid, individual
Amount not confirmed. See official pricingTeam
Team
Amount not confirmed. See official pricingMinimum seats: not confirmed, so no total price is calculated.
All features7 questions, each with its source and the date we checked it
Input and output
- LanguagesLanguages it transcribes or speaks, as stated.
- Grammar checks in English, German, Spanish and French.help.quillbot.comchecked 2026-10-11
- Grammar and spellingMarks grammar, spelling and punctuation mistakes and suggests fixes.
- Supportedquillbot.comchecked 2026-10-11
Plan not specified
- Rewrite and change toneRewrites a sentence or paragraph, for example shorter, more formal or friendlier.
- Supportedhelp.quillbot.comchecked 2026-10-11
Plan not specified
- Writes new textDrafts new text from a short instruction, not only fixes what you wrote.
- Supportedquillbot.comchecked 2026-10-11
Plan not specified
Checking facts
- Plagiarism checkCompares your text with published sources and shows matches.
- Supportedhelp.quillbot.comchecked 2026-10-11
Plans: Premium, Team
Workflow
- PlatformsWhere the product is offered: web, desktop app, mobile app, or editor extension.
- Web, Desktop app, Mobile apphelp.quillbot.com +1checked 2026-10-11
- Works inApps and places it works in, such as a browser extension, Word or Google Docs, as officially listed.
- Browser extension, Microsoft Wordquillbot.comchecked 2026-10-11