QuillBot vs Grammarly in 2026: One Is Free, the Other $144/Year — Which Fixes More

QuillBot and Grammarly both promise to fix your writing. One charges $144/year for premium. The other gives you most of the same features for free, and charges $50/year for the rest. The question is not which one is better in the abstract — it's which one is worth the money for the way you actually write.

This is not a "we tested both for 30 days" article. This is a feature-by-feature breakdown of what each tool does today, what it costs, and where the $94/year gap between them either makes sense or doesn't.

Grammar and spelling

Both tools catch the basics: subject-verb agreement, missing commas, its vs. it's, their vs. they're. In real-world use, the overlap is around 85-90% — feed the same paragraph to both and you'll get the same red underlines on the same words most of the time.

Where Grammarly pulls ahead: it flags style issues like passive voice, wordiness, and sentence length. The suggestions are specific — "Consider revising this sentence" with a concrete rewrite. If you write long-form content in English and want a second pair of eyes on style, Grammarly's suggestions are more granular.

Where QuillBot differs: instead of flagging the problem and suggesting a fix, it rewrites the sentence entirely. For a native English speaker, this can feel heavy-handed. For someone writing in a second language, the full rewrite is often more useful than knowing the name of the grammar rule you broke.

Paraphrasing

This is where the tools diverge completely.

QuillBot was built as a paraphraser. Paste a paragraph, choose from 8 modes (Fluency, Formal, Simple, Creative, Shorten, Expand, Academic, Custom), and get a rewrite in seconds. The free tier limits you to 125 words per paraphrase; premium removes the limit. For students, academics, and anyone who rewrites more than they write from scratch, this is the core feature.

Grammarly added paraphrasing in late 2025, but it's not the same. It works inline — select a sentence, click "Rewrite" — and gives you one or two alternatives. No mode selection, no paragraph-level rewrites, no batch processing. It feels like an afterthought compared to QuillBot's dedicated paraphraser.

If you copy-paste more than you type, QuillBot does the job Grammarly only pretends to.

Plagiarism checking

Grammarly includes a plagiarism checker in its Premium plan. It compares your text against a large database of web pages and academic papers. It's not as thorough as Turnitin, but for a blogger or content creator checking originality before publishing, it's good enough.

QuillBot also has a plagiarism checker in its Premium plan, but the database is smaller. For academic work where plagiarism detection matters, Grammarly's checker catches more sources. For a quick originality scan, both work.

Tone detection

Grammarly analyzes the tone of your writing — confident, friendly, formal, diplomatic — and shows it in real time as you type. This is useful for emails and professional communication where you want to sound a specific way. QuillBot doesn't have this feature. If tone control matters to you, Grammarly is the only choice.

Integrations

Grammarly works inside Google Docs, Microsoft Word, Gmail, Outlook, Slack, and most browsers via its extension. It feels native — the suggestions appear inline, in the app you're already using.

QuillBot's browser extension covers Chrome and Edge. It works in Google Docs and most text fields, but the integration is less polished. The paraphraser works best on quillbot.com itself, which means copy-pasting for heavy rewrites.

Price

This is where the comparison gets uncomfortable for Grammarly.

| Plan | QuillBot | Grammarly | |---|---|---| | Free | Grammar checks + 125-word paraphrase | Grammar and spelling only | | Premium (annual) | $49.95/year | $144/year | | Premium (monthly) | $9.95/month | $30/month |

QuillBot's free tier includes grammar checking — the feature Grammarly locks behind its free tier too, but without tone, style, or plagiarism. QuillBot Premium adds unlimited paraphrasing, plagiarism checks, and advanced grammar modes for $50/year. Grammarly Premium adds tone, style, plagiarism, and rewrites for $144/year.

The feature overlap between the two premium plans is about 80%. The price gap is almost 3x.

The verdict

QuillBot wins if you write in a second language and need full rewrites, you paraphrase more than you compose, you're on a budget, or you're a student who needs an academic paraphraser. The $50/year price makes the premium tier an easy decision.

Grammarly wins if you need real-time tone detection, a larger plagiarism database, or deep integrations with Google Docs, Outlook, and Slack. If your writing workflow lives entirely inside Google Workspace, Grammarly's inline suggestions save real time.

The catch: neither tool replaces a human editor for anything that matters. Both miss context errors that change the meaning of a sentence — the kind of mistake that turns "let's eat, grandma" into "let's eat grandma." The $144 you save by choosing QuillBot over Grammarly buys roughly 3 months of a freelance proofreader on Fiverr.

Use the free tiers of both for a week with your actual writing. The tool that catches more of your mistakes — not more mistakes in general — is the one worth paying for.

Disclosure: the QuillBot link in this article is an affiliate link. We earn a commission if you subscribe through it, at no extra cost to you. We recommend QuillBot because it genuinely solves the paraphrasing problem for less money — not as filler.

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