
特化型Cross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
特化型Cross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
OETStudy は月間 4,738 訪問、前月比成長率 +264.2%、料金体系無料を記録しています。ZeroGPT は月間 32,864,541 訪問、成長率 +19.7%、料金体系フリーミアム、有料を記録しています。

OETStudy is a free practice platform for the Duolingo English Test. It offers a large bank of exam-style questions, AI-powered scoring for speaking and writing tasks, CEFR vocabulary checks, and progress analytics to help learners target a higher score.
| 項目 / 指標 | ![]() | |
|---|---|---|
| 公式ドメイン | oetstudy.com | zerogpt.com |
| 料金モデル | 無料 | フリーミアム、有料 |
| 月間訪問数 | 4738 (4,738) | 3286.45万 (32,864,541) |
| 前月比トラフィック増減 | +3437 (+264.2%) | +541.1万 (+19.7%) |
| 主要市場とシェア | 🇺🇸 アメリカ合衆国 (100%) | 🇺🇸 アメリカ合衆国 (43%) |
| 月間ダイレクト訪問数 | 1537 | 822万 |
| ユーザー評価 | 4.4 | 3.8 |
| 対応プラットフォーム | ウェブサイト | ウェブサイト |

OETStudy is a free practice platform for the Duolingo English Test. It offers a large bank of exam-style questions, AI-powered scoring for speaking and writing tasks, CEFR vocabulary checks, and progress analytics to help learners target a higher score.
A large bank of DET-style items spanning speaking, writing, listening, and reading, graded by difficulty so you can practise at the level you need.
Speaking and writing submissions are scored automatically, evaluating pronunciation, fluency, grammar, and content structure with suggestions for improvement.
Check your vocabulary level against CEFR bands and build word lists clustered around the question types you practise most.
Practice statistics and score analysis highlight weak areas and show how your performance changes over time.
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.
Paste up to 15,000 characters or upload a file and get a highlighted breakdown of which sentences appear AI-written, plus an overall percentage score and a downloadable PDF report.
Beyond text, ZeroGPT offers an AI image detector and an AI video detector that performs frame-level analysis to flag generated or manipulated visuals.
Compare your text against billions of sources through the plagiarism checker, or rewrite and humanize AI text with the paraphraser and AI humanizer while keeping the original meaning.
A bundled writing suite covers summarization, grammar and spelling correction, translation across many languages, a dictionary, word and character counting, citation generation, and an AI email writer.

特化型Cross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
特化型Cross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
特化型Popular paraphrasing assistant focused on rewriting and grammar correction, but lacks dedicated AI detection scanners.
特化型Popular paraphrasing assistant focused on rewriting and grammar correction, but lacks dedicated AI detection scanners.
教育者から信頼される業界標準のAI検出機能で、ZeroGPTと同様に強固な文単位の分析を提供します。

特化型Academic editing platform pairing AI plagiarism detection with professional human proofreaders for student papers.
特化型Academic editing platform pairing AI plagiarism detection with professional human proofreaders for student papers.
信頼性の高いAI検出と高度なテキスト人間化ツールを組み合わせ、機械生成されたコンテンツを自然に書き換えます。
信頼性の高いAI検出と高度なテキスト人間化ツールを組み合わせ、機械生成されたコンテンツを自然に書き換えます。

複数の言語でAIテキスト、画像、ソースコードを検出し、エンタープライズレベルのコンテンツ検証を提供するスイート。
PTE Academic・PTE Coreを無料で練習、スピーキングとライティングはAI採点

デジタルパブリッシャー向けの高精度なAI検出と盗用チェックに特化した、包括的なコンテンツ整合性プラットフォーム。
デジタルパブリッシャー向けの高精度なAI検出と盗用チェックに特化した、包括的なコンテンツ整合性プラットフォーム。
Prep Edu is an online language-learning and exam-preparation platform combining structured IELTS, TOEIC and HSK courses with AI-powered practice. Its Prep AI Virtual Speaking Room and Virtual Writing Room simulate real exam conditions and return feedback on grammar, pronunciation, vocabulary, ideas and logic, while the Teacher Bee AI companion offers round-the-clock guidance. Learners get a personalised roadmap, mock tests, progress tracking and mobile access for studying at home.
Prep Edu is an online language-learning and exam-preparation platform combining structured IELTS, TOEIC and HSK courses with AI-powered practice. Its Prep AI Virtual Speaking Room and Virtual Writing Room simulate real exam conditions and return feedback on grammar, pronunciation, vocabulary, ideas and logic, while the Teacher Bee AI companion offers round-the-clock guidance. Learners get a personalised roadmap, mock tests, progress tracking and mobile access for studying at home.

文単位の詳細なスコアリングと文章の整合性チェック機能を提供する、多言語対応のAIコンテンツ検出プラットフォーム。
文単位の詳細なスコアリングと文章の整合性チェック機能を提供する、多言語対応のAIコンテンツ検出プラットフォーム。