QuillBot vs Grammarly: Picking the Right Tool for Your Writing Job
Published October 19, 2026 · 7 min read
Search "QuillBot vs Grammarly" and you'll find plenty of takes declaring a winner. Here's the honest answer up front: there is no overall winner, because these tools do different jobs. QuillBot rewrites your sentences. Grammarly polishes them. The right choice depends entirely on what you're trying to do — and many writers end up using both.
What Each Tool Actually Does
QuillBot: the rewriter
QuillBot's flagship product is its paraphraser — you paste in a sentence or paragraph, pick a writing mode (Standard, Fluency, Formal, and others on the paid plan), and it rewords the text while keeping the meaning. Around that core, QuillBot has built a suite: a grammar checker, a summarizer, a plagiarism checker, a citation generator, and a translator.
The key number to know: QuillBot's free paraphraser caps each paraphrase at 125 words. That's fine for reworking a paragraph, but you'll hit the wall fast on longer documents. The premium plan removes the cap and unlocks all modes plus the plagiarism checker.
Grammarly: the polisher
Grammarly is a writing assistant that works where you write — browser extension, desktop app, and integrations. It flags spelling and grammar errors, suggests clearer phrasing, tightens wordy sentences, and (on paid plans) adjusts tone and checks for plagiarism. Its free plan covers the core grammar, spelling, and punctuation checking most people need day to day.
What Grammarly doesn't have is a dedicated paraphrasing tool. It will suggest a clearer rewrite of a clunky sentence, but it won't take a paragraph and reword it in a different style the way QuillBot's modes do.
Head-to-Head: Where They Overlap and Where They Don't
Rewording and paraphrasing — QuillBot wins
This isn't close. Paraphrasing is QuillBot's entire reason for existing, with multiple modes for different tones and purposes. Grammarly's rewrite suggestions are a side feature aimed at clarity, not a rewording engine. If your task is "say this differently," QuillBot is the tool.
Try a free paraphrasing tool to feel the difference: paste a stiff paragraph and watch it come back restructured, not just corrected.
Grammar and correctness checking — Grammarly wins
Grammarly has spent over a decade refining its grammar engine, and it shows: it catches subtle issues (article usage, preposition choices, subject-verb agreement in long sentences) that simpler checkers miss, and explains why something is wrong. QuillBot's grammar checker is competent for basic errors but it's a supporting feature, not the main event.
For everyday correctness — emails, documents, posts — run your text through a grammar checker in the Grammarly mold before you send anything that matters.
Plagiarism checking — tie (both paid)
Both tools offer plagiarism detection, but only on their premium plans. Neither publishes its database size in comparable terms, so treat both as a pre-check, not a verdict — your university's or publisher's official checker is the one that counts.
Free tier generosity — depends on the job
- For rewriting: QuillBot's free tier is your only option between the two, but the 125-word cap means frequent copy-pasting on long documents.
- For correctness: Grammarly's free tier is the more generous deal — full grammar, spelling, and punctuation checking without a per-use word cap on the checking itself.
Which Should You Pick? A Decision Framework
Pick QuillBot if you:
- Need to reword sentences or paragraphs regularly
- Want different tones (formal, simple, creative) for the same text
- Are working with source material you need to restate in your own words
Pick Grammarly if you:
- Want a safety net for grammar and spelling across everything you write
- Need tone and clarity suggestions, not rewording
- Write mostly in your browser or in docs and want inline help
Use both if you:
- Draft with AI or from sources, reword in QuillBot, then run the result through Grammarly for a final correctness pass. The free tiers stack neatly for exactly this workflow: paraphrase (QuillBot free, 125 words at a time), then polish (Grammarly free, no cap on checking).
Three Writer Profiles, Three Answers
The student writing essays and lab reports: start with Grammarly free for everyday correctness, and use QuillBot free when you need to restate a source in your own words (with citation, always). If your university restricts paraphrasing tools on assessed work, Grammarly-only is the safe setup.
The job seeker writing resumes and cover letters: Grammarly is the workhorse — it catches the typos and awkward phrasing that cost interviews. QuillBot helps when a bullet point needs rewording for impact. This is also where an AI humanizer earns its keep as a final pass over AI-drafted application materials.
The content marketer producing articles and emails at volume: QuillBot's rewriting modes save real time when adapting one piece for multiple channels, and the premium unlimited words matter here. Grammarly's tone suggestions keep brand voice consistent. If you're choosing one paid plan, pick based on which bottleneck hurts more: rewording speed (QuillBot) or error-free output (Grammarly).
A Note on Pricing
Both tools sell monthly and annual subscriptions, and both run promotions that change the effective price — so any specific number quoted in a comparison article goes stale fast. Check both sites for current pricing before deciding. As a rule of thumb, annual billing cuts the monthly-equivalent price substantially on both.
The Bottom Line
Stop asking which tool is better and start asking which job you're doing. Rewording job? QuillBot. Polishing job? Grammarly. Most serious writing involves both jobs, which is why the "versus" framing is misleading — these two are complements, not rivals.
Frequently Asked Questions
Is QuillBot better than Grammarly?
Neither is better overall — they do different jobs. QuillBot's strength is paraphrasing and rewriting sentences; Grammarly's strength is grammar checking, clarity, and tone. Pick based on the task, not the brand.
Can Grammarly paraphrase like QuillBot?
Not really. Grammarly suggests clarity and tone rewrites, but it has no dedicated paraphrasing tool with rewriting modes. If your main need is rewording text, QuillBot's paraphraser is the purpose-built option.
Which has the better free plan?
It depends on your task. Grammarly's free plan covers everyday grammar, spelling, and punctuation checking with no word cap on the checking itself. QuillBot's free paraphraser caps each paraphrase at 125 words. For rewriting work, Grammarly's free tier goes further; for paraphrasing, QuillBot's free tier is the only option of the two.
Do both have plagiarism checkers?
Yes, but only on paid plans for both. If plagiarism checking is a core need, compare the premium tiers directly — and note that neither replaces your institution's official checker.
Can I use QuillBot and Grammarly together?
Yes, and many writers do: draft and reword in QuillBot, then paste into Grammarly for a final grammar and clarity pass. The free tiers of both tools stack well for this workflow.
Do these tools work for academic writing?
They can help with clarity and rewording, but check your institution's AI policy first. Some universities restrict paraphrasing tools on assessed work. When in doubt, ask your instructor.
