QuillBot

Wordtune

Wordtune is an AI writing assistant from AI21 Labs that rewrites sentences to sound clearer, more concise, or more persuasive, offering multiple phrasing alternatives and tone adjustments between formal and casual for any piece of text. It works as a browser extension and web editor, integrating into places people already write online such as Gmail and Google Docs. Beyond rewriting, Wordtune summarizes long articles and webpages into key points, checks grammar and spelling, expands vocabulary with contextual synonym suggestions, and translates text from 10 languages into English. It is aimed at professionals, content creators, students, and non-native English speakers who want to sound more natural and confident without hiring an editor.

Grammarly

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, and style in real time across browsers, desktop apps, and mobile keyboards. It integrates directly into Gmail, Google Docs, Microsoft Word, Slack, and thousands of other websites via a browser extension. Beyond basic correctness, Grammarly analyzes tone and clarity, suggesting rewrites to make writing more concise, confident, or friendly depending on the context and audience selected by the user. GrammarlyGO adds generative AI features for drafting emails, replying to messages, and rewriting passages on demand, while Grammarly Business adds brand style guides and analytics for teams that need consistent written communication across an organization.

Copy.ai

Copy.ai is an AI copywriting platform that helps users generate high-quality marketing copy, sales outreach, and other go-to-market content. It offers templated and workflow-based content generation, making it easier for businesses to create engaging content at scale.

Scribbr

Scribbr offers academic proofreading, editing, and plagiarism detection services tailored to university papers, theses, and dissertations. Their team of subject‑matter experts improves language, structure, and citation accuracy while ensuring originality. The platform combines human editors with AI tools, providing a transparent workflow, detailed feedback reports, and a satisfaction guarantee. It is accessed online, making it convenient for students worldwide.