Grammarly

Style and grammar editor with manuscript-level feedback for authors.

ProWritingAid goes beyond grammar to analyze pacing, sentence variety, dialogue tags, and readability, plus AI-driven manuscript critique, beta-reader simulation, and story analysis. It integrates into Word, Google Docs, Scrivener, and browsers, aimed at long-form and fiction writers.

AI rewriting and paraphrasing assistant from AI21 Labs.

Wordtune rewrites and paraphrases sentences with tone control, plus grammar correction, summarization of articles and videos, and a humanizer for AI-sounding text. It runs as a browser extension, web app, and iOS app, and integrates into tools like Gmail and Slack.

Writing suite for paraphrasing, grammar, and summarizing.

QuillBot is a writing suite centered on paraphrasing, grammar checking, and summarizing, with added tools for citation, plagiarism and AI detection, and translation. It runs on the web, as browser extensions and a Word add-in, and on desktop and mobile, widely used by students and professionals.

AI-native collaborative document editor for serious writers.

Lex is a clean, Google-Docs-style word processor with AI editing built in — feedback, brainstorming, rewriting, and AI commands alongside real-time collaboration and version history. It targets writers who want frontier models inside a focused writing surface rather than a chat sidebar.