ProWritingAid

AI writing assistant for grammar, tone, clarity, and generative drafting.

Grammarly checks grammar, spelling, clarity, and tone across the apps you already write in, and layers generative AI on top for drafting, rewriting, and tone adjustment. It works as a browser extension, desktop app, mobile keyboard, and web editor, with detection for plagiarism and AI-generated text on paid tiers.

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 writing partner built specifically for fiction and novelists.

Sudowrite is an AI writing tool aimed at fiction authors, with a Story Bible for outlining, Write/Expand/Describe tools that draft in the author's voice, and a Canvas for plotting arcs and themes. Unlike general assistants, it is tuned for long-form creative narrative rather than business or marketing copy.

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.