⚡ Quick Verdict:
- 価格: QuillBot Premium starts at $4.17/month. Grammarly Pro starts at $12/month. Both have a free plan.
- 最適な用途: Grammarly suits grammar checking and academic papers. QuillBot suits paraphrasing and budget writers.
- 主な違い： Grammarly is a full grammar checker. QuillBot is built around its paraphrasing tool.
- Our pick: Grammarly for most writers. It catches more grammar errors and reads tone and style.
QuillBot and Grammarly both claim to make your writing better.
But they were built to solve two different problems.
Grammarly is a grammar checker that fixes mistakes as you type.
QuillBot is a paraphrasing tool that rewrites your sentences.
So the quillbot vs grammarly choice depends on what you write.
This guide breaks down both writing tools to help you pick.
概要
This Quillbot vs Grammarly comparison covers pricing, key features, and ease of use.
We also break down who each writing アシスタント works best for.
Our sources include published specs, documentation, and G2 reviews.
Our writers also spent hands-on time with both QuillBot and Grammarly.
By the end, you will know which grammar checking tool fits your writing process.
QuillBotとは何ですか？
QuillBot is an AI powered writing assistant built around a paraphrasing tool.
It was developed in 2017 to reword text quickly.
あなたはできる 言い換え in six different modes, like formal and creative.
It also includes a summarizer, citation ジェネレータ, and translator.
QuillBot offers a basic grammar checker too, with word-level suggestions.
Watch how the rewriting works in this quick walkthrough.
クイルボット
A budget friendly writing assistant for paraphrasing. It rewrites dense sentences and improves fluency. Start free without signing up.
QuillBotの価格設定
Here is what QuillBot costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0（永久無料） | Testing the paraphrasing tool |
| プレミアム | 月額4.17ドル | Students and budget writers |
| チームプラン | カスタム価格設定 | Groups and small teams |
Pricing verified June 2026.
無料トライアル: The free plan is free forever. No credit card is needed to start.
返金保証: Quillbot Premium offers a 3-day refund policy.
📌 注記： The $4.17 rate is the monthly cost when billed annually. QuillBot’s monthly plan costs $19.95 if you pay month to month.
⚠️ 警告： Quillbot’s premium plagiarism checker limits checks to 20 pages monthly. That is tight for long research paper work.
Key Benefits of QuillBot
Here is what makes QuillBot worth considering:
- Paraphrasing tool: QuillBot offers six modes including formal and creative. You can reword up to 10,000 words at a time.
- Freeze words: You can lock specific words so the tool keeps them. This protects names and key terms.
- 追加ツール: A summarizer, citation ジェネレータ, and translator come built in. These are helpful features for academic writers.
- Budget friendly: Premium is cheaper than most writing assistants. The free version stays usable for daily tasks.
- No login needed: You can start without signing up or logging in. The dual-pane layout shows original and paraphrased text side by side.
- Multiple languages: The paraphraser supports several languages, not just English grammar.
What Our Team Noticed
私たちの 作家 signed up for QuillBot and used it for everyday rewriting tasks. Here is what stood out from that hands-on time:
QuillBot Pros & Cons
✅ メリット
- Six paraphrasing modes with the option to freeze words
- Budget friendly pricing with a free forever plan
- Built-in summarizer, translator, and citation generator
- Works without signing up or logging in
❌ デメリット
- Grammar checker is less efficient than Grammarly’s
- Plagiarism checking is capped at 20 pages per month
- Can risk accidental plagiarism if used carelessly
Grammarlyとは何ですか？
Grammarly is an AI powered writing tool focused on grammar checking.
It corrects grammar, spelling errors, and punctuation errors in real time.
It also adds style suggestions, tone detection, and readability scores.
The grammar checker can detect up to 250 grammar errors in seconds.
It works inside Microsoft Word, Google Docs, and Google Chrome.
See the grammar checking and style features in this overview.
🏆 Winner: Grammarly
A full grammar checker for fixing grammar mistakes fast. It reads tone and style as you write. The browser extension works almost everywhere.
Grammarlyの価格
Here is what Grammarly costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0 USD | Basic grammar and spelling fixes |
| プロ | $12 USD/month | Academic writers and pros |
| 企業 | 営業担当者へのお問い合わせ | 大規模組織 |
Pricing verified June 2026.
無料トライアル: The free plan is available with no credit card needed. It covers basic grammar checking.
返金保証: Grammarly does not advertise a fixed refund window, so check current terms at checkout.
📌 注記： The $12/month rate reflects annual billing. Grammarly 仕事 starts at $15/month per user for teams that need shared style rules.
⚠️ 警告： Plagiarism detection and most style suggestions sit behind Grammarly Premium. The free version is a basic grammar checker.
Key Benefits of Grammarly
Here is what makes Grammarly worth considering:
- Deep grammar checking: Grammarly catches grammatical errors that simple tools miss. It also explains why each correction matters.
- Style suggestions: It flags unnecessary words and weak sentence structure. Tone detection helps you match your intended audience.
- Grammarly’s plagiarism checker: Premium scans billions of web pages for plagiarism checking. Pro plans include unlimited plagiarism checks.
- どこでも動作します: The browser extension runs in Google Chrome, Microsoft Word, and Google Docs. Errors are highlighted in different colors for clarity.
- Vocabulary suggestions: It suggests stronger word choices and improves writing quality. This builds your writing skills over time.
- Clean dashboard: The dashboard shows all checked documents for easy access. Navigation stays simple for new users.
What Our Team Noticed
Our writer signed up for Grammarly and used it across documents and emails. Here is what stood out from that hands-on time:
Grammarly Pros & Cons
✅ メリット
- Detects up to 250 grammar errors in seconds
- Strong tone detection and readability scores
- Plagiarism checker scans billions of web pages
- Excellent browser extension for real-time assistance
❌ デメリット
- No dedicated paraphrasing tool like QuillBot
- Most features need Grammarly Premium
- Can miss some errors that QuillBot catches
機能比較
Ready to dig into QuillBot and Grammarly side by side? We will look at nine key features, then pricing. This helps you see where each writing tool wins.
| 特徴 | クイルボット | 文法 |
|---|---|---|
| 開始価格 | 月額4.17ドル | 月額12ドル |
| 無料プラン | ✅ | ✅ |
| 文法チェッカー | ✅ 基本 | ✅ 上級者向け |
| 言い換えツール | ✅ | ✅ 限定 |
| 盗作チェッカー | ✅ 20 pages/mo | ✅ 無制限（プロ） |
| Tone & Style Suggestions | ❌ | ✅ |
| 引用ジェネレータ | ✅ | ✅ |
| ブラウザ拡張機能 | ✅ | ✅ |
| 最適な用途 | 言い換え | 文法チェック |
1. Grammar Checking
クイルボット: The grammar checker gives individual word-level suggestions. It is a basic grammar checker that catches spelling errors and common grammar mistakes. In tests it found 13 errors where Grammarly found 30.
文法: Grammarly focuses on deep, full-sentence grammar correction. It can detect up to 250 grammar errors in seconds and explains each fix. For checking grammar in academic papers, this depth matters.
⚠️ 警告： QuillBot’s grammar checker is less efficient than Grammarly’s. If correcting grammar is your main goal, Grammarly is the stronger grammar checking tool.
2. Paraphrasing Tool
クイルボット: This is where QuillBot shines. The paraphrasing tool rephrases text to improve fluency or change tone. You get six modes and can freeze words you want to keep. It rewrites up to 10,000 words at once.
文法: Grammarly added a paraphrasing feature, but it is limited next to QuillBot. It is less focused on deep sentence structure rewriting. Many users pair both, using Grammarly for proofreading and QuillBot for rewording dense sentences.
3. 盗作検出
クイルボット: QuillBot’s premium plagiarism checker allows 20 pages per month. Some reviewers find it better for short academic papers. But the monthly cap limits heavy plagiarism checking.
文法: Grammarly’s plagiarism checker scans billions of web pages. The premium plan includes unlimited plagiarism checks. For checking academic papers against large databases, it is more accurate.
4. Style and Tone Suggestions
クイルボット: QuillBot offers limited style feedback. It can trim unnecessary words during paraphrasing. But it does not score tone or readability the way Grammarly does.
文法: Grammarly offers style suggestions, vocabulary suggestions, and tone detection. It flags wordy phrasing and weak sentence structure. This helps you match your intended audience and keep a consistent writing style.
5. 引用ジェネレーター
クイルボット: QuillBot includes a free citation generator. It can generate citations in common styles for a research paper. This is handy for students who need quick references.
文法: Grammarly also helps you generate citations and includes a citation finder. It fits naturally into the writing process when you draft inside a word processor.
6. Summarizer and Translation
クイルボット: QuillBot bundles a summarizer and a translator. The summarizer shortens long text by word length or key points. The translator supports multiple languages, which other tools often charge extra for.
文法: Grammarly does not summarize or translate. Instead it leans into proofreading and clarity. It helps you improve sentence structure without changing your meaning.
7. AI Writing and Humanizer Tools
クイルボット: QuillBot adds an AI Humanizer and an AI chat helper. These use machine learning to smooth out robotic phrasing. They are useful when drafting posts for ソーシャルメディア プラットフォーム。
文法: Grammarly’s generative AI drafts and rewrites short passages. Its artificial intelligence focuses on clear, correct output. It works well as an everyday ai writing assistant.
8. Integrations and Platforms
クイルボット: QuillBot offers browser add-ons plus a Microsoft Word add-in and a Google Chrome extension. The dual-pane layout makes side-by-side editing simple.
文法: Grammarly has wider reach. It works in MS Word, Google Docs, Google Chrome, and most apps. The browser extension gives real-time help almost anywhere you type.
9. 使いやすさ
クイルボット: QuillBot is quick to start. You can use it without an account. The interface puts your original text and the rewrite next to each other.
文法: Grammarly has a straightforward interface with easy navigation. The dashboard stores every document you check. Color-coded highlights make spelling mistakes easy to spot.
10. 価格設定とコスト
料金プランを並べて比較してみましょう。
| プラン | クイルボット | 文法 |
|---|---|---|
| 無料 | $0（永久無料） | $0 USD |
| プレミアム／プロ | 月額4.17ドル | 月額12ドル |
| ビジネス／企業 | カスタム価格設定 | 営業担当者へのお問い合わせ |
クイルボット: QuillBot is the budget friendly writing assistant. Premium runs $4.17/month billed annually. For students and casual writers, the free version handles most tasks.
文法: Grammarly Premium costs more at $12/month, billed annually. But it adds unlimited plagiarism checks, style suggestions, and deeper grammar checking. Grammarly Business starts at $15/month per user.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 予算が限られている | クイルボット | Far cheaper monthly |
| Best grammar checking | 文法 | Catches more grammar errors |
| Heavy paraphrasing | クイルボット | Six rewriting modes |
| Tone and style help | 文法 | Style suggestions and tone detection |
| 初心者向け | 文法 | Simple, guided interface |
💰 あなたの予算
QuillBot is the cheaper pick by a wide margin. If price drives your choice, the QuillBot Premium plan beats Grammarly Premium on cost.
🔌 あなたの技術スタック
Both work in Google Chrome and Microsoft Word. Grammarly reaches more apps, so it fits more of your daily writing tools.
📝 あなたの文章スタイル
QuillBot rewrites text while keeping the same writing style intact. Grammarly polishes your own words instead of replacing them.
🎓 あなたの経験レベル
New writers like that Grammarly explains each fix. Academic writers often run both grammar チェッカーズ together for safety.
🆓 無料トライアルとデモ
Both free versions are worth testing first. Try each on a real document before paying for the premium versions.
🛟 サポートオプション
Both offer help docs and email support. Heavy users building a freelance writing career may prefer Grammarly’s larger help library.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替える場合、どのような変更が想定されますか？
🔄 Switching from QuillBot to Grammarly?
✅ 得られるもの：
- Deeper grammar checking that catches more grammatical errors
- Tone detection, readability scores, and style suggestions
- Unlimited plagiarism checks against billions of web pages
❌ 失うもの：
- Six-mode paraphrasing and the freeze words feature
- Built-in summarizer and translator
- The lower QuillBot price
📋切り替え方法：
- Copy your text out of QuillBot
- Create a free Grammarly account
- Install the Google Chrome extension and paste your draft
🔄 Switching from Grammarly to QuillBot?
✅ 得られるもの：
- A stronger paraphrasing tool with multiple modes
- A summarizer, translator, and citation generator in one place
- A lower monthly price
❌ 失うもの：
- Advanced grammar checking and error explanations
- Tone detection and detailed style feedback
- Unlimited plagiarism detection
📋切り替え方法：
- Export or copy your text from Grammarly
- Open QuillBot, no signup required to start
- Paste your text and pick a paraphrasing mode
What Our Review Didn’t Cover
This comparison focused on individual writers, students, and small teams. We did not test enterprise rollouts or deep API use. Our notes reflect the June 2026 versions, so features may shift. If you manage a large content team, your priorities may differ from what we covered here.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | クイルボット |
| 🚀 Grammar Checking | 文法 |
| ✍️ Paraphrasing | クイルボット |
| 🎯 Plagiarism Detection | 文法 |
| 🎨 Style & Tone | 文法 |
| 👶 使いやすさ | 文法 |
| 🏆総合優勝 | 文法 |
🏆 WINNER: GRAMMARLY
Grammarly wins 4 out of 6 categories.
最適な用途: grammar checking, academic papers, tone and style, real-time editing
QuillBot and Grammarly solve different problems. Grammarly is the better grammar checker. QuillBot is the better paraphrasing tool.
If your main job is to fix mistakes and lift writing quality, Grammarly is the safer pick. It catches more grammar errors, reads tone, and helps you improve sentence structure and sentence length.
QuillBot is excellent for rewording dense text on a budget. Not every reader needs deep grammar tools, and a punctuation checker plus a paraphraser may be enough for them.
Many writers use both QuillBot and Grammarly together. The grammarly and quillbot combo covers rewriting and proofreading at once.
More of QuillBot Compared
Here is how QuillBot stacks up against other tools:
クイルボット対 ペーパーパル
QuillBot wins on: cheaper pricing, six paraphrasing modes, broader free version
Paperpal wins on: academic-only focus, journal-ready edits, subject-specific suggestions
クイルボット対 ライトソニック
QuillBot wins on: paraphrasing depth, freeze words, lower entry price
Writesonic wins on: long-form blog drafting, marketing templates, SEO コンテンツツール
クイルボット対 よむ
QuillBot wins on: rewriting modes, translator, cheaper plans
Yomu wins on: citation handling, research paper workflow, in-document AI
More of Grammarly Compared
Here is how Grammarly stacks up against other writing assistants:
Grammarly vs ジェニー
Grammarly wins on: grammar accuracy, tone detection, plagiarism scanning
Jenni wins on: AI essay drafting, in-line citations, academic auto-complete
Grammarly wins on: real-time correcting grammar, proofreading depth, app coverage
Writesonic wins on: bulk content generation, ad copy, image and blog tools
Grammarly vs サイダー
Grammarly wins on: dedicated grammar checkers, document dashboard, tone scoring
Sider wins on: multi-model AI chat, page summaries, browser research tasks
よくある質問
Is Grammarly more accurate than QuillBot?
Yes, for grammar. In tests Grammarly found 30 errors while QuillBot found 13. Grammarly’s grammar checker reads sentence structure more deeply and explains each fix.
プロのライターはQuillBotを使っているのか？
Many do, mostly for paraphrasing and summarizing. Professionals often pair it with a stronger grammar checker, using QuillBot to reword dense sentences and another tool to fix mistakes.
QuillBotの欠点は何ですか？
Its grammar checking is weaker than Grammarly’s. The plagiarism checker also caps at 20 pages monthly. Careless paraphrasing can risk accidental plagiarism in academic papers.
Which tool is better than QuillBot?
For grammar and tone, Grammarly is better. For pure paraphrasing on a budget, few tools beat QuillBot. The best choice depends on your target audience and tasks.
Should I use QuillBot or Grammarly?
Pick Grammarly for grammar checking and academic writing. Pick QuillBot for paraphrasing on a budget. Many writers use both QuillBot and Grammarly together for the best results.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 