
特化型Outstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.

SmartStudi.com is a suite of AI writing tools for students that combines an AI and plagiarism detector with a paraphraser, an undetectable AI chatbot, an essay generator, a citation generator, a summariser and a grammar checker. Tools work through the web app or a sidebar Chrome extension, and a single subscription unlocks everything.
| 項目 / 指標 | ![]() | ![]() |
|---|---|---|
| 公式ドメイン | grammarly.com | smartstudi.com |
| 料金モデル | フリーミアム | フリーミアム、無料トライアル |
| 月間訪問数 | 5886.74万 (58,867,412) | 1898 (1,898) |
| 前月比トラフィック増減 | -91.61万 (-1.5%) | -2357 (-55.4%) |
| 主要市場とシェア | 🇺🇸 アメリカ合衆国 (51.9%) | 🇺🇸 アメリカ合衆国 (90.2%) |
| 月間ダイレクト訪問数 | 2539.87万 | 748 |
| ユーザー評価 | 4.4 | 3.4 |
| 対応プラットフォーム | ウェブサイト | ウェブサイト |

リアルタイムの文法修正、トーン調整、著作性の追跡、チーム向けスタイルガイドを提供するクロスプラットフォームAIライティングアシスタント。
Chrome、Safari、Firefox、Edge、Windows、Mac、Google Docs、MS Office、モバイルキーボードの中でネイティブに動作し、文法ミスを示し、こじれた文を書き換え、自信に満ちた、共感的な、あるいは経営層向けの語調へトーンを移します。
対象読者が下書きにどう反応するかを予測し、信頼できる裏付けとなる引用を見つけ、ルーブリック基準で小論文を採点し、Proでは毎月最大2,000回のプロンプトで下書きを生成する文脈対応AIエージェントを展開します。
数十億のWebページや学術データベースと照合して偶発的な盗用を検出し、AI生成の箇所を見つけ、Google DocsやWordのAuthorshipレポートで文書の出自を透明に記録します。
ProおよびEnterpriseプランのチームが、企業用語を成文化し、非推奨の専門用語を禁止し、インクルーシブな表現を徹底し、共有スニペットを挿入し、社内定義をインラインで表示できるようにします。

SmartStudi.com is a suite of AI writing tools for students that combines an AI and plagiarism detector with a paraphraser, an undetectable AI chatbot, an essay generator, a citation generator, a summariser and a grammar checker. Tools work through the web app or a sidebar Chrome extension, and a single subscription unlocks everything.
Scan writing with a frequently updated AI content detector and a plagiarism scanner that presents conservative, consistent results.
Rewrite academic text with a paraphraser tuned to produce natural, human-reading prose, with file upload and language options.
Use a chatbot that answers like a general assistant but is designed to produce responses that pass popular AI detectors.
Generate complete citations and annotated bibliographies up to 20 sources at once, plus summarise long texts and check grammar.

特化型Outstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.
QuillBot is an AI writing suite best known for its paraphrasing tool. Users paste or type text and have it rewritten in different tones and styles, while companion tools handle grammar checking, summarizing, citations, plagiarism checks and AI content detection. It is widely used by students, writers and professionals.
QuillBot is an AI writing suite best known for its paraphrasing tool. Users paste or type text and have it rewritten in different tones and styles, while companion tools handle grammar checking, summarizing, citations, plagiarism checks and AI content detection. It is widely used by students, writers and professionals.
ZeroGPT is an AI content detection platform with a text AI detector, AI image and video detectors, AI humanizer, plagiarism checker, and a set of writing tools including paraphraser, summarizer, grammar checker, translator, and citation helper.
ZeroGPT is an AI content detection platform with a text AI detector, AI image and video detectors, AI humanizer, plagiarism checker, and a set of writing tools including paraphraser, summarizer, grammar checker, translator, and citation helper.
特化型GPTZero is an AI detection platform for identifying machine-generated text. It combines a text detector with a Chrome extension, a plagiarism checker, writing-process verification, and educator-focused classroom tools.
学術校正・盗用チェック・AI ライティングツールを一つの場所に

アプリ間で強力な多言語の文法・スタイルチェックを提供しますが、高度な生成AI機能は少なくなっています。
アプリ間で強力な多言語の文法・スタイルチェックを提供しますが、高度な生成AI機能は少なくなっています。

より詳細な原稿分析や構成レポートを提供しますが、Grammarlyよりも学習曲線が急です。
より詳細な原稿分析や構成レポートを提供しますが、Grammarlyよりも学習曲線が急です。
特化型Paperpal is an AI writing assistant built for researchers, academics, and students. It proofreads and rewrites academic prose in real time, suggests citations, checks references, and reads PDFs — all from inside Microsoft Word, Google Docs, Overleaf, the Chrome extension, or the web editor.
特化型Paperpal is an AI writing assistant built for researchers, academics, and students. It proofreads and rewrites academic prose in real time, suggests citations, checks references, and reads PDFs — all from inside Microsoft Word, Google Docs, Overleaf, the Chrome extension, or the web editor.
特化型文単位の分析に対応した多言語 AI 検出ツール
特化型可読性と文の複雑さを視覚的に強調しますが、自動文法修正やブラウザ全体での拡張機能のサポートが欠けています。
特化型可読性と文の複雑さを視覚的に強調しますが、自動文法修正やブラウザ全体での拡張機能のサポートが欠けています。

文単位のトーン調整や書き換えには最適ですが、独立した文法規則やスタイルガイドの網羅性は劣ります。

Quetext is an online writing-integrity platform built around its DeepSearch™ engine, combining a plagiarism checker, AI content detector, grammar checker, summarizer, humanizer, citation generator and paraphrasing assistant in one dashboard. It is used by students, teachers, copywriters and content teams to confirm that a piece of writing is original, human-written and properly sourced before it is submitted or published.
Quetext is an online writing-integrity platform built around its DeepSearch™ engine, combining a plagiarism checker, AI content detector, grammar checker, summarizer, humanizer, citation generator and paraphrasing assistant in one dashboard. It is used by students, teachers, copywriters and content teams to confirm that a piece of writing is original, human-written and properly sourced before it is submitted or published.