According to AlphaMoat, as of 2026-09, the Chrome extension Compose AI has 300,000 users (+0% MoM), rated 4.1 (243 reviews) — ranked #47 of 9,324 AI browser extensions, and #7 of 744 in Writing.
What is Compose AI
Accelerate your writing with AI Generate any text using AI. Autocomplete your sentences where you type. With Compose AI, you can write emails, create documents, and chat faster. We use artificial intelligence to automate the writing process.
Prompt AI to generate any text, where you already write. Get suggestions for new ways to say something. Draft entire emails from a few words. You can do all that with just one tool. Compose AI is a holistic, AI-first writing solution:
⚡ Type // to generate text using AI 🏄 Autocomplete sentences across different websites ✍️ Rephrase sentences to make them friendlier, more professional, shorter, or longer 🎯 Reply to emails with a click 📄 Generate full-length emails from short phrases
Compose Anything
Type // to generate any text. Prompt our AI to write blog posts, marketing copy, paragraphs, sentences, headlines, topical information, research and more.
Autocomplete
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Our extension’s core feature is Autocomplete. Just hit Tab to take a completion and save time typing.
Compose Email
Compose Now is an AI assistant for writing messages. It's great for drafting quick replies or generating ideas you can edit to make your own. To open, press Option+G (or Alt+G).
Easy Email Reply
Professionally reply to emails with a single click! Like magic, generated responses will reference the context from the original email.
Rephrase
With Rephrase, you can change how you word your sentences without having to rewrite anything. Highlight a text to shorten, expand, reword, or make something sound more friendly or formal.
Check out this guide which has a link to our natively supported websites: https://compose.ai/guide
We’re always working to improve your experience with Compose AI. If you have any questions or feedback, we’d love to hear about them at [email protected]
Extension profile
User Growth Trend
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.