GrammarBot vs Outwrite

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.

面向学校与编辑的 AI 检测与写作验证

集学术校对、查重与 AI 写作工具于一体

一次扫描完成 AI 检测、查重与内容质量评估

既是语法检查器，也是写作技艺教练

支持句子级洞察的多语言 AI 检测工具

用可读性与语法反馈，写出更清晰有力的文字

Wordtune is an AI writing assistant from AI21 Labs that rewrites and tightens your sentences in one click, checks grammar, sums up documents and translates other languages into natural English.

用于改写、人性化与消除抄袭的西班牙语 AI 改写工具

Trinka is a privacy-first AI writing assistant built for academic and technical writing. Beyond grammar, it handles paraphrasing, consistency checks, file proofreading for Word and LaTeX, citation formatting and quality checks, plagiarism and AI detection, journal finding, and translation across 30+ languages.

专为学术英语打造的 AI 写作与校对，直接融入 Word 与 Overleaf