Grammarly vs QuillBot: Which Writing Assistant Is Better?

Grammarly and QuillBot are two of the most popular AI writing tools, especially for students, professionals, and non-native English speakers. They're often compared because both can improve your writing. But they started with different goals: Grammarly focuses on correcting and improving writing as you type, while QuillBot became famous for paraphrasing and rewriting text. Today their features overlap more, but their strengths are still different.

Price comparison

Grammarly offers a free plan and a paid Pro plan. At the time of writing (October 2026), several 2026 pricing guides report Grammarly Pro at about $12 per month on annual billing, or around $30 per month billed monthly. Grammarly is now part of the Superhuman company, and plans have changed recently, so check its official pricing page.

QuillBot also offers a free plan and a Premium plan, typically with monthly, semi-annual, and annual billing options. Prices vary by billing period and region, so check QuillBot's website for current rates.

Both free plans are useful enough to test before paying.

Grammar and spelling correction

Grammarly's core strength is real-time correction. It works across many websites and apps, checking spelling, grammar, punctuation, clarity, and tone as you write. It's especially useful for emails, documents, social media posts, and messages.

QuillBot also has a grammar checker, and it's helpful for quick corrections. But Grammarly's experience is more integrated into daily writing.

Edge: Grammarly.

Paraphrasing and rewriting

QuillBot is best known for its paraphraser. You paste text, choose a mode, and QuillBot rewrites it with different wording or tone. Modes can help make text more formal, simpler, shorter, or more fluent.

Grammarly can rewrite sentences and adjust tone using AI, but QuillBot's paraphrasing tool remains one of its most recognizable strengths.

Edge: QuillBot.

Tone and clarity

Grammarly provides suggestions for clarity, conciseness, and tone. It can flag wordy sentences, passive voice, unclear phrasing, and language that may sound too harsh or too casual.

QuillBot can help rewrite text in a different style, but it's less focused on ongoing tone feedback while you write.

Edge: Grammarly.

Integrations and convenience

Grammarly works across browsers, desktop apps, and many popular writing environments. Once installed, it can follow you across email, documents, and web forms.

QuillBot also offers browser extensions and integrations, but many people use it as a separate tool where they paste text for rewriting or summarizing.

Edge: Grammarly.

Additional tools

QuillBot includes a broad set of writing tools, such as paraphrasing, summarizing, citation generation, translation, and grammar checking. For students and researchers, this all-in-one toolkit can be very useful.

Grammarly includes AI writing assistance, tone detection, clarity suggestions, and other tools for professional writing. It's more focused on helping you produce polished final text.

Edge: QuillBot for academic utility; Grammarly for professional communication.

Academic integrity and responsible use

Both tools can be used responsibly, but students should be careful. Correcting grammar is usually acceptable, while heavily paraphrasing someone else's work without proper citation can still be plagiarism. Always follow your school's or employer's rules, cite sources correctly, and use AI tools to improve your own writing rather than disguise someone else's.

Which one should you choose?

Choose Grammarly if you:

• Write lots of emails, reports, and professional messages.
• Want real-time grammar and tone suggestions everywhere you write.
• Care about clarity, professionalism, and polished final text.

Choose QuillBot if you:

• Need to rephrase or simplify text often.
• Want summarizing, citation, and paraphrasing tools in one place.
• Are a student or researcher working with lots of source material.

Can you use both?

Yes. Many people use QuillBot to rewrite or simplify drafts and Grammarly to polish the final version. If budget is limited, start with the free versions and upgrade only the tool you use most.

A simple test

Take three pieces of your own writing: an email, a longer document, and a paragraph you want to rewrite. Run them through the free versions of both tools. Pay attention to which suggestions you actually accept and which ones make your writing sound less like you. That will tell you which assistant fits your style.

Bottom line

Grammarly is the better everyday writing assistant for professional communication, real-time corrections, and tone. QuillBot is the better tool for paraphrasing, summarizing, and academic writing support. Choose based on whether you mainly need to polish what you write or rewrite what you already have.

Official sites: Grammarly · QuillBot

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Cover photo by Dillon Shook on Unsplash