Sapling

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.

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.

AI autocomplete and writing assistance inline across Gmail, Docs, and the web.

Compose AI is a browser extension that adds AI-powered autocomplete and text generation directly into the fields you already type in — Gmail, Google Docs, and most web apps. It finishes sentences as you write, drafts full emails from a one-line instruction, rephrases text, and supports custom shortcuts to expand snippets. The core extension is free, with a premium tier for personalization features.