QuillBot – AI Paraphrasing, Grammar & Writing Assistant

★★★★☆ 4.3/5

8 Paraphrase Modes • Grammar & Spell Checker • Plagiarism Checker • AI Summarizer • Citation Generator • Word Add-in

Free (125 words/paraphrase); Premium $8.33/mo (annual), $13.31/mo (quarterly), $19.95/mo (monthly); 3-day money-back guarantee

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AI Writing Tool Freemium Grammar Checker Research Assistant Study Assistant Tool Review Content Creation Productivity Research/Education Writing

QuillBot is an AI paraphrasing and writing assistant used by over 50 million students, academics, and content writers who need to rewrite existing text rather than generate original content. Where Grammarly focuses on error correction and Wordtune rewrites for tone, QuillBot is the only platform offering 8 distinct paraphrase modes — making it the dominant choice for academic paraphrasing and ESL writing improvement as of 2026.

Key Features

QuillBot’s paraphraser delivers 8 modes: Standard, Fluency, Creative, Formal, Simple, Expand, Shorten, and Academic — each producing structurally distinct rewrites for different audiences. The Premium plan ($8.33/mo annually) removes the 125-word free-tier cap, enabling full-document paraphrasing. A Grammar Checker integrates directly into Google Docs and Microsoft Word via add-in. The Plagiarism Checker scans academic databases, while the Citation Generator supports APA, MLA, and Chicago formats — making QuillBot a complete academic writing toolkit for under $100/year.

Use Cases

University students use Academic mode to paraphrase research sources for essays while maintaining citation integrity — a task where ChatGPT generates new text but QuillBot preserves the original argument’s structure. Content marketers adapt articles for different regional audiences using Formal and Simple modes in under 5 minutes. ESL professionals run Fluency mode on translated documents to eliminate awkward phrasing before client delivery. Researchers use the Summarizer to compress 10-page papers into 200-word abstracts.

Pricing & Plans

The free plan caps each paraphrase at 125 words — workable for single paragraphs, not full documents. Premium costs $8.33/mo (annual), $13.31/mo (quarterly), or $19.95/mo (monthly). All Premium tiers include unlimited paraphrasing and all 8 modes. Start with Free to test paraphrase quality; upgrade when you regularly work with documents over 500 words.

Pros

8 paraphrase modes — more stylistic control than any direct competitor
Google Docs and Microsoft Word add-ins for in-context editing
Full academic toolkit: paraphraser + plagiarism checker + citation generator
Premium at $8.33/mo (annual) — among the cheapest AI writing tools available

Cons

Free tier hard-capped at 125 words per paraphrase — forces upgrade quickly
Not built for original content generation — no templates, no ad copy
Plagiarism check credits restricted on shorter billing cycles
AI detection evasion not guaranteed — outputs remain detectable by GPTZero

Our Final Verdict

QuillBot's 8-mode paraphraser plus plagiarism checker, citation generator, and grammar checker make it the most complete rewriting platform available at $8.33/month annually — used by over 50 million people. Best for university students, ESL professionals, and content marketers who adapt and rewrite existing text at volume rather than generating original copy from scratch. Skip it if you need original content creation — Jasper, Copy.ai, or Rytr are purpose-built for that. Compare all writing tool pricing at the AI Pricing Hub.