QuillBot vs Grammarly: Which Free Writing Tool Should You Use?

Ask two different people which writing tool is better and you will get two different answers, one swears by QuillBot, the other cannot imagine writing without Grammarly. The confusion is understandable, because the QuillBot vs Grammarly debate looks like a simple either-or choice, but the two tools were actually built to solve different problems.

This is an honest breakdown based on documented features and how these tools are actually used.

The 30-Second Verdict

• Pick Grammarly if your main problem is mistakes. Typos, grammar errors, clumsy sentences. Grammarly catches them in real time, everywhere you type.
• Pick QuillBot if your main problem is rewriting. Restating an idea in different words, smoothing out an awkward sentence, varying your vocabulary.
• Use both if you write a lot. They complement each other nicely, and both have genuinely useful free tiers.

Short on time? Pick the one that matches your biggest writing weakness, then read on for the details.

Students may also want our roundup of the best free AI tools for students, where both tools earn a spot.

QuillBot: The Paraphrasing Specialist

QuillBot started as a paraphrasing tool and that is still its superpower. You paste in a sentence or paragraph, and it rewrites it, same meaning, different words. Over time it has added extras like a grammar checker, a summarizer, and a citation generator, but paraphrasing is the feature people come for.

What it's great at

Rewriting your own words. This is the single most useful thing QuillBot does. Stuck writing the same idea three times in an essay? Paste the clunky sentence in, try a different mode, and compare the options. The free plan's "Standard" and "Fluency" modes produce surprisingly natural rewrites; fancier modes like Creative are paid features.

Fixing awkward phrasing. Sometimes a sentence is technically correct but sounds off. QuillBot's rewrites often smooth out word order and word choice in ways that make writing flow better.

Expanding your vocabulary. QuillBot suggests synonyms as you write, which helps when you keep reaching for the same words. It's a gentle way to make your writing less repetitive without sounding like you swallowed a thesaurus.

Built-in extras. The free plan includes a basic grammar checker, a summarizer, and a citation generator. They are not best in class, but having them in one place is convenient. We cover it alongside other options in our guide to free AI writing tools that actually work.

Where it falls short

QuillBot's free tier limits how much text you can paraphrase at once, so long passages need to be processed in chunks, and the exact limits change over time, so check the current plan before building a workflow around it. Its grammar checker also catches fewer issues than Grammarly's, which is the more dedicated tool for that job. And it does not watch over your shoulder while you type in other apps the way Grammarly does, you generally work inside QuillBot's own interface or extension.

Best for: Students and writers who need to restate ideas, smooth out drafts, and vary their wording, especially in academic and professional writing.

Grammarly: The Grammar Guardian

Grammarly is the tool that sits in the background and checks your writing.

What it's great at

Catching errors in real time. This is Grammarly's core strength. Subject-verb agreement, misplaced commas, misspelled words, missing articles, it flags them as you type, before you hit send. For non-native English speakers, this alone is worth installing.

Working everywhere. Grammarly's browser extension and desktop app follow you across apps. You write an email, a cover letter, a tweet, and Grammarly is there checking. No copying and pasting into a separate tool.

Clarity suggestions. Beyond outright errors, Grammarly flags wordy or confusing sentences and suggests tighter versions. The free tier covers the basics here, while advanced tone and style suggestions are mostly paid features.

Where it falls short

Grammarly is not a paraphrasing tool. It will not take your paragraph and restate it five different ways, that's QuillBot's territory. It can also be overconfident, sometimes it suggests changes that alter your meaning or flatten your personal style, so treat its suggestions as advice, not orders. And its free tier, while genuinely useful, locks the deeper rewrites, tone detection, and plagiarism checking behind the paid plan, as of 2026.

Best for: Anyone who writes emails, messages, and documents daily and wants a safety net that catches mistakes automatically.

QuillBot vs Grammarly Head-to-Head: Common Writing Tasks

"Paraphrase this paragraph for my essay"

QuillBot wins easily. Paste the paragraph, pick a mode, and you get multiple rewrite options to choose from. Grammarly can improve the paragraph's grammar and clarity, but it won't restate the ideas in fresh words. If paraphrasing is the job, this is not even close.

"Fix the grammar in this email before I send it"

Grammarly wins. It checks as you type inside your email client, so there's no extra step. QuillBot has a grammar checker, but you'd have to copy the email into its interface, fix it, and copy it back. For quick proofreading, Grammarly is far more convenient.

"Help me write an academic paper"

It depends on the stage. QuillBot is more useful during drafting, rewording sentences, varying vocabulary, generating citations. Grammarly is more useful during final proofreading, catching the errors your tired eyes missed. Honestly, many students use both: QuillBot to shape the draft, Grammarly to polish it.

"Polish my resume and cover letter"

Grammarly has the edge, because a resume with a single typo can get rejected, and Grammarly catches those errors everywhere, including inside job application portals. QuillBot is useful for rewriting bullet points that sound repetitive ("responsible for" five times in a row), so it's a strong second tool for this task. Our guide to using AI for job applications covers this workflow in more detail.

Free vs Paid: What You Actually Get

Both tools follow the same business model: a free tier that's genuinely useful and a paid tier that unlocks the advanced stuff. Here's the honest breakdown, as of 2026.

QuillBot free gives you paraphrasing with a word limit per paraphrase, a couple of basic modes, the grammar checker, and the summarizer. The paid plan removes the limits, unlocks all modes (including Creative), and adds faster processing. If you only paraphrase occasionally, free is fine.

Grammarly free gives you spelling and grammar checking, basic clarity suggestions, and tone hints everywhere you type. The paid plan adds full-sentence rewrites, advanced tone and style feedback, and plagiarism detection. For everyday error catching, free does the job.

Pricing and limits change often, so check the current pricing pages before paying for either tool.

A Quick Word on Academic Integrity

This matters especially with paraphrasing tools. Using QuillBot to improve your own writing, rewording your own clumsy sentences, is fine. Using it to disguise someone else's text as your own is plagiarism, and most universities now use detection tools that can spot it. The safe rule: AI should help you express your own ideas better, never replace the thinking.

My Honest Recommendation

Here's what I'd actually tell a friend asking about QuillBot vs Grammarly:

Install Grammarly first. It runs quietly in the background and saves you from embarrassing mistakes in emails, applications, and messages every single day. The free version is the best "set it and forget it" writing upgrade available.

Bookmark QuillBot for drafting. When you're writing an essay, a report, or anything where you need to say the same thing in different words, open QuillBot. It's the better tool for the creative part of writing, getting your ideas into good sentences.

Use both, they're free. This is not a rivalry you have to pick a side in. Grammarly guards your finished writing, QuillBot helps you build it. Together they cover almost everything a beginner writer needs, at zero cost.

The only wrong choice is using neither and sending out avoidable mistakes.

Frequently Asked Questions

Can I use QuillBot and Grammarly together? Yes. They do different jobs, so they don't conflict. A common workflow is drafting and rewording in QuillBot, then running the final text through Grammarly for a last error check. Both free tiers can be used side by side.

Is QuillBot free really free? Yes, with no credit card required. It limits how much you can paraphrase at once and locks the advanced modes, but for occasional rewriting it's fully usable. Limits change over time, so check the current free plan details on their site.

Which is better for non-native English speakers? Grammarly, for most people. Its real-time corrections teach you as you write, you'll start noticing your own patterns of mistakes. QuillBot is a great second tool for rewording sentences you can't quite get right.

Will using these tools get flagged as AI writing? Grammarly's grammar corrections are standard proofreading and generally not an issue. Heavy paraphrasing with QuillBot to disguise copied text can be detected by academic integrity tools, so use it on your own writing only and follow your institution's rules.

About the Author

Timber Trace runs AI Tricks Lab, where AI tools are explained in simple words for beginners. Every guide is written to help you actually use the tools, not just read about them.