QuillBot vs Grammarly: Which AI Writing Tool is Better?

Struggling to decide between QuillBot and Grammarly? You're not alone. As writing becomes more essential across education, business, and content creation, the demand for reliable AI writing tools has exploded. Whether you're polishing essays, drafting emails, or optimizing content for SEO, choosing the right writing assistant can make your work easier and more effective.

Both QuillBot and Grammarly have carved out loyal fan bases. QuillBot shines with its powerful paraphrasing abilities, while Grammarly leads in grammar checking and writing clarity. In this QuillBot vs Grammarly comparison, we'll break down what each tool offers—from key features and pricing to real-world use cases—helping you decide which fits your writing needs.

Overview of QuillBot & Grammarly

QuillBot

QuillBot is a versatile and powerful tool built primarily for paraphrasing and content rewriting. It offers a range of modes such as Fluency, Formal, Academic, and Creative, which allow users to customize the tone and style of their writing. This makes it a valuable tool for students, researchers, and content creators who need to rephrase or rework their content.

Beyond paraphrasing, QuillBot also includes features such as grammar checking, summarization, citation generation, and translation in over 40 languages. The free version offers essential tools, including basic paraphrasing (up to 125 words), grammar checks, and summarization. However, users who want access to advanced tools like unlimited paraphrasing, plagiarism detection, and more comprehensive summarization will need to opt for the premium version.

QuillBot’s flexibility, combined with its affordable pricing, makes it an ideal choice for those who need both a paraphrasing tool and additional writing assistance without breaking the bank. Whether you're a student working on assignments or a content creator looking to refine your writing, QuillBot offers the right balance of features and ease of use.

Grammarly

Grammarly is a comprehensive writing assistant that goes beyond simple grammar correction. It provides advanced checks for spelling, punctuation, sentence structure, and style, offering real-time suggestions that help improve the clarity and readability of text. Grammarly’s free version includes basic grammar and spelling checks along with tone detection, but it’s the premium version that unlocks its full potential with features like style enhancement, plagiarism detection, and AI-powered content generation through GrammarlyGO.

Grammarly is trusted by professionals, businesses, and academics alike, thanks to its ability to provide polished, error-free writing. The platform’s integrations with various applications—such as Microsoft Word, Google Docs, and email clients—make it highly accessible across different work environments. With Grammarly, users can refine their writing and ensure that their content is not only grammatically correct but also appropriately structured and presented. Grammarly offers comprehensive writing assistance with advanced grammar, style checks, and real-time suggestions, making it ideal for professionals, academics, and content creators. Whether polishing business emails, writing research papers, or crafting engaging copy, it provides the tools to refine and perfect your writing. With seamless integrations across various platforms, it helps maintain consistency and precision in any project.

Features Comparison

QuillBot vs. Grammarly Paraphraser

QuillBot is a powerhouse when it comes to paraphrasing. With 10 predefined modes like Fluency, Formal, and Academic, QuillBot offers a level of customization that Grammarly doesn’t. You can easily tailor the rephrasing to match the tone and style you want, and with the Premium version, you can even create unlimited custom paraphrasing modes. It also includes a Smart Thesaurus, allowing you to click on any word and see a list of synonyms. However, the free version limits you to 125 words for paraphrasing, which can feel restrictive for longer content.

On the other hand, Grammarly offers a basic, completely free paraphrasing tool, but with very limited features. The tool is focused on sentence-level rewrites, helping to improve the clarity and flow of your writing. However, it lacks the flexibility and customization options that QuillBot provides. While it can certainly help rephrase sentences for better readability, it doesn’t offer the wide range of predefined modes or the ability to create custom paraphrasing modes like QuillBot. If you need quick, simple sentence-level changes, Grammarly’s free paraphrasing tool does the job, but for more advanced rephrasing, you'll need to look at the premium version.

QuillBot vs. Grammarly Grammar Checker

QuillBot offers a simple, yet effective grammar checker that helps you improve your writing by fixing spelling, grammar, and punctuation. It’s great for anyone who wants to clean up their text without losing the original meaning. QuillBot’s free version allows you to check grammar as much as you need and even supports over 6 languages, which is helpful for international users. While it doesn’t have advanced features like tone adjustments, it’s a solid option for people looking for quick and easy grammar corrections.

Grammarly is a bit more advanced when it comes to grammar checking. It not only helps with grammar and punctuation, but it also focuses on improving the clarity and style of your writing. Grammarly provides suggestions for sentence flow and can even help with adjusting the tone to match your writing’s purpose. The free version covers basic grammar checks, but for more advanced suggestions and plagiarism detection, you’d need to upgrade to Grammarly Premium. It’s perfect for anyone looking to refine their writing with more in-depth feedback.

QuillBot vs. Grammarly AI Detector

QuillBot's AI Detector identifies AI-generated content and provides a detailed report on how much of the text may have been created by AI tools. It supports English, French, German, and Spanish. While helpful, it can sometimes flag human-written text as AI-generated.

Grammarly's AI Detector offers a percentage score to show how much of the text is likely AI-generated. It also checks for plagiarism, providing a comprehensive assessment. It supports English, French, Spanish, German, and Dutch, but like QuillBot, it’s not 100% accurate.

Both tools are useful, with Grammarly offering integration with other writing features and QuillBot providing detailed insights.

QuillBot vs. Grammarly Plagiarism Checker

QuillBot’s Plagiarism Checker helps ensure the originality of your content by scanning for any potential plagiarism. It provides a real-time report, highlighting sections that need citations, and supports 100+ languages. However, to unlock the plagiarism checker, you need a Premium subscription, which allows you to scan up to 25,000 words per month. QuillBot is particularly useful for users who need to check content in multiple languages.

Grammarly’s Plagiarism Checker also provides an originality score by scanning your text against billions of web pages and academic databases. It offers instant plagiarism reports and provides suggestions on how to properly cite sources. Grammarly also identifies potential AI-generated content, making it a great tool for those concerned with both plagiarism and AI use. It’s ideal for users who want to ensure their work is plagiarism-free and properly cited without any extra subscriptions for plagiarism checking.

QuillBot vs. Grammarly Summarizer

QuillBot’s Summarizer condenses long texts, articles, or reports into key points or a shorter version. It supports up to 600 words for free, with larger limits in the premium plan. You can choose between paragraph or bullet point summaries and adjust the summary length. It’s a handy tool for students, researchers, and professionals needing quick takeaways.

Grammarly’s Summarizer is completely free and helps simplify complex content like reports, articles, or papers. It also lets you pick between bullets or paragraph format, and you can set a preferred writing style for your summary. While Grammarly focuses more on clarity and ease of reading, it works well for users wanting a quick, clean summary without extra features.

Pricing & Plans Comparison

Free Versions

• QuillBot Free: Limited paraphrasing (125 words max), grammar checks, summarizer.
• Grammarly Free: Basic grammar and spelling checks, 100 AI prompts per month.

Premium Plans

Note: QuillBot offers a 3-day money-back guarantee and the ability to pause subscriptions. Grammarly provides annual discounts but does not offer refunds.

Apps & Extensions Comparison

QuillBot Pros & Cons

Pros

• Best-in-class paraphrasing with 10+ rewording modes.
• Affordable annual pricing.
• Intuitive interface; ideal for students and academics.
• Multilingual support (40+ languages).
• Citation generation for MLA, APA, Chicago, and more.
• Includes summarizer and translation tools.
• AI detection and plagiarism checker in paid plans.
• Browser, desktop, and mobile apps; Google Docs, MS Word integrations.

Cons

• Grammar checking is less advanced than Grammarly.
• Tone detection only shows tone, does not suggest changes.
• No dedicated desktop apps beyond extensions.
• No full-sentence AI rewrites like GrammarlyGO.
• Summarizer has a word limit even for premium users.

Grammarly Pros & Cons

Pros

• Industry leader for grammar, punctuation, and clarity.
• Best tone suggestion tool with real-time writing help.
• Plagiarism detection included with all paid plans.
• Highly polished desktop and mobile apps.
• GrammarlyGO provides full-sentence AI rewriting and content generation.
• Extensive integrations (MS Word, Google Docs, email clients).
• Strong team collaboration tools (brand tones, style guides, analytics).

Cons

• Higher pricing compared to QuillBot.
• No translation or multilingual support.
• Paraphrasing limited to sentence-level rewrites.
• Requires constant internet connection; no offline mode.
• Limited academic citation support compared to QuillBot.

Use Cases: Which Is Better For?

Conclusion

Both QuillBot and Grammarly are powerful writing tools, but they serve different needs. If your main focus is paraphrasing, translation, and academic writing, QuillBot stands out with its flexible rewriting modes, multilingual capabilities, and added convenience of an all-in-one writing workspace. QuillBot also offers the most important AI Humanizer feature, which Grammarly does not provide.

For those who want the most accurate grammar checker, along with real-time writing suggestions and tone improvements, Grammarly remains the best choice, especially for professionals and businesses.

We highly recommend trying the free versions of both to see which one suits your writing style and needs the best.

FAQs

Is QuillBot better than Grammarly?

It depends on your needs. QuillBot is better for paraphrasing, translations, and academic writing. Grammarly excels at grammar correction, tone adjustments, and writing polish.

Does Grammarly have a paraphrasing tool?

Yes, Grammarly offers basic sentence-level rewrites via GrammarlyGO. QuillBot provides a more advanced, multi-mode paraphrasing engine.

Which is cheaper: QuillBot or Grammarly?

QuillBot is much more affordable, with annual plans starting at $4.17/month versus Grammarly's $12/month.

Does Grammarly work offline?

No. Both Grammarly and QuillBot require an internet connection.

Is QuillBot good for academic writing?

Yes. QuillBot is highly valued by students and researchers for its powerful paraphrasing, citation generation, and summarization tools.