Quick verdict
Choose QuillBot if you mainly need to paraphrase, summarize or rewrite text, especially for academic work, and want a strong free plan at a lower price.
Choose Grammarly if you want real-time grammar, clarity and tone suggestions while you write in emails, documents and web apps.
Overview
QuillBot
QuillBot is an all-in-one AI writing platform built around its Paraphraser. It also includes a grammar checker, AI detector, AI humanizer, summarizer, translator, plagiarism checker and citation generator.
Grammarly
Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, clarity and tone in real time. It also offers generative AI features to draft, rewrite and adjust text, and works across thousands of websites and apps.
Features compared
- Paraphrasing: QuillBot is the stronger choice, with multiple rewriting modes and a synonym slider. Grammarly can rewrite sentences, but paraphrasing is not its main focus.
- Grammar and spelling: Grammarly is the stronger choice, with more detailed real-time suggestions for correctness, clarity and style. QuillBot's grammar checker covers the basics well.
- Tone and style: Grammarly detects your tone and suggests adjustments for different audiences, which is useful for professional writing.
- Summarizing: QuillBot includes a dedicated summarizer for long articles and documents.
- AI detection and plagiarism: Both tools offer AI detection and plagiarism checking, with the plagiarism checker reserved for paid plans.
- Citations and translation: QuillBot includes a citation generator and a translator, which makes it popular with students.
Integrations
- QuillBot: Web app, Chrome extension, Microsoft Word, Google Docs, desktop and mobile apps.
- Grammarly: Browser extensions, desktop apps for Windows and Mac, Microsoft Word, Google Docs, mobile keyboard and support for thousands of websites and apps.
Pricing
- QuillBot: Free plan with word limits and basic modes; Premium unlocks unlimited paraphrasing, all modes and the plagiarism checker.
- Grammarly: Free plan with basic grammar and spelling checks; paid plans add advanced suggestions, tone adjustments, more generative AI and plagiarism detection.
QuillBot Premium is generally the cheaper option. Check both official websites for current prices.
Best for
- Students and researchers: QuillBot, thanks to paraphrasing, summaries and citations.
- Professionals and business writing: Grammarly, thanks to real-time corrections and tone suggestions.
- Non-native English speakers: Both are useful; many people use QuillBot to rewrite and Grammarly to correct.
Final thoughts
QuillBot and Grammarly are not direct replacements for each other. QuillBot helps you rewrite and restructure content, while Grammarly helps you write correctly and clearly in the first place. If your budget allows, using both together covers the full writing process.