QuillBot

AI writing suite for paraphrasing, grammar, and content creation

Freemium 💰 Deals Available

About QuillBot

QuillBot, a product of Learneo Inc. (formerly Course Hero), serves over 35 million users across 180+ countries and has partnered with 140+ academic institutions. Its flagship paraphraser supports 9 rewriting modes (including Formal, Creative, and Academic) and 23 languages, making it one of the most versatile on the market. The free plan is genuinely usable but limited to 125 words per paraphrase — a hard cap that frustrates users who deal with longer texts daily. Premium starts at €8.33/month (billed annually) or approximately $9.95/month. The tool is NOT ideal for professional long-form content marketers who need brand-voice consistency, nor for teams needing collaborative workflows — QuillBot lacks real-time co-editing. Website claims '35M+ users' and a 4.7/5 Chrome Store rating (5.5M+ installs), which aligns with external data, but user reviews on G2 and Capterra consistently flag that the AI Detector and Plagiarism Checker are less accurate than standalone competitors like Turnitin or Winston AI.

Key Features

Paraphraser — rewrites text in 9 modes (Formal, Academic, Creative, Fluency, Simple, Expand, Shorten, Humanize, Custom) with synonym control

Grammar Checker — detects grammar, spelling, punctuation errors with advanced style suggestions on Premium

AI Humanizer — rewrites AI-generated text to pass AI detectors, with a human score and tone insights on Premium

AI Detector — identifies AI-generated content; limited free tier, unlimited on Premium

Plagiarism Checker — scans text against web sources; 25,000 words/month on Premium

Summarizer — condenses documents up to 6,000 words (Premium) into key points or paragraphs

Translator — translates text into 40+ languages

Citation Generator — creates APA, MLA, and Chicago citations from URLs, DOIs, or manual entry

AI Chat — brainstorming and Q&A assistant, unlimited on Premium

PDF Tools — ChatPDF, PDF editor, merge, split, rotate, convert, and extract pages

Pros & Cons

Pros

• Best-in-class paraphraser with 9 rewriting modes — competitors like Grammarly and Wordtune offer fewer stylistic options and no 'Custom mode' builder
• Genuinely useful free tier — 125-word paraphraser, grammar check, and basic AI detection without a credit card, unlike many competitors
• 35M+ users and 4.7/5 Chrome rating with 5.5M+ installs — consistently ranked #1 paraphrasing tool by students on G2 and Capterra
• All-in-one writing platform — paraphraser, grammar, plagiarism, AI detector, summarizer, translator, PDF tools, and image generation under one subscription
• Broad language support — paraphrasing in 23 languages and translation in 40+, outpacing Wordtune (English-only paraphrasing) in multilingual use cases
• 14-day money-back guarantee and subscription pause option — rare quality-of-life features in this category

Cons

• Free plan 125-word cap is a hard wall — among the most complained-about limitations on G2/Reddit; Wordtune offers more free rewrites per day without word caps
• AI Detector and Plagiarism Checker are less reliable than dedicated tools — users on Capterra report false negatives vs. Turnitin and Winston AI; the website does not disclose accuracy rates
• Paraphrased output can feel mechanical on lower modes — reviewers note Standard and Fluency modes produce robotic-sounding text that still requires manual editing
• No real team collaboration features — Team Plan only adds billing/admin dashboards, not shared workspaces or co-editing, unlike Notion AI or Jasper
• Premium pricing is annual-lock — monthly billing is significantly more expensive and not prominently displayed; users report surprise at being billed annually after sign-up
• Customer support is slow for billing disputes — multiple Trustpilot and Reddit reports of difficulty cancelling auto-renewals and getting refunds despite the 14-day guarantee policy

Best For

University students and academic writers who need to paraphrase, cite, and check plagiarism within one affordable subscription ESL writers and multilingual content creators who need paraphrasing and grammar correction across 23+ languages Freelance bloggers and content writers producing 2,000–5,000 words/day who need a fast rewriting and grammar-check workflow Educators and academic institutions (140+ already partnered) needing AI detection and plagiarism scanning for student submissions Solo professionals and solopreneurs who want an all-in-one writing assistant without paying for Grammarly Premium + a separate AI detector + a separate summarizer