Writing
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Compose AI is a Chrome extension that autocompletes sentences as you type, anywhere on the web. Whether you are writing an email, a document, a chat message or a form, it suggests the next words and full sentences in real time, learning your writing style as it goes. The promise is simple and measurable in time saved: less typing, fewer blank-page pauses, and drafts that sound like you rather than like a generic template.
The difference from a chatbot is that Compose AI works inside your existing workflow. There is no separate app to open and no prompt to write: you type, it suggests, you accept with a keystroke or keep typing. It also offers rephrasing, shortening and expanding, one-click email replies, and a compose feature for generating longer text from a short prompt. For knowledge workers who write all day in a browser, that ambient assistance adds up faster than a tool used only for occasional long documents.
Autocomplete is the flagship feature. As you type, Compose AI predicts the rest of your sentence and, on higher plans, longer passages, tuned to your personal style from your past writing. The extension works across text fields in the browser, so the same assistance follows you from Gmail to Google Docs to Slack. It learns phrasing you reuse, which is why its suggestions tend to improve over the first weeks: early suggestions are generic, later ones sound noticeably more like your own writing.
Alongside autocomplete, Compose AI provides rephrase, reword, shorten and expand actions for selected text, Easy Email Replies that draft responses to incoming mail, and Advanced Autocomplete for longer, context-aware completions. Paid plans raise or remove the monthly caps on these actions, with Ultimate removing every listed cap. The free Basic plan is a real, usable tier for light use, but its caps on generated words, rephrases, replies and autocompletes are low for a heavy daily writer.
Compose AI offers a free Basic plan, and paid Premium and Ultimate plans. An August 2026 check of the official pricing page reported Premium at $9.99 per month billed as $119.88 per year, and Ultimate at $29.99 per month billed as $359.88 per year, with 7-day trials on both paid plans; some other listings show Premium at $14.99, so confirm the checkout total on compose.ai before subscribing. Sources: compose.ai pricing via anygen.io and spotsaas.com, checked 31 October 2026.
Autocomplete is a double-edged tool. Accepting suggestions without thinking can make your writing smoother but also more generic, and in sensitive emails a predicted sentence that sounds plausible may say something you did not intend. The extension only works in the browser, so it will not help in desktop apps outside Chrome, and its style learning needs your writing data, which privacy-conscious users should consider before enabling it broadly.
Caps are the practical limit on the free plan: 1,500 generated words, 25 rephrases, 10 email replies and 50 autocompletes per month run out quickly for a daily writer, and Premium still caps generated words and email replies. The pricing disagreement noted above is another reason to verify at checkout. Compose AI is best for high-volume browser writing; for long-form drafting from scratch, a dedicated writing tool may suit you better.
Give the style learning time: use it for two weeks on everyday writing before judging whether its suggestions sound like you. Accept suggestions selectively, and always re-read an email reply before sending, since autocomplete optimises for fluency, not intent. If you hit a cap every month, upgrade on the specific limit you hit: Premium removes rephrase and autocomplete caps, while Ultimate is only needed when generated words or email replies also run out.
For snippet-based replies, Text Blaze and Magical insert templates anywhere with shortcuts. For general grammar and tone, Grammarly covers more surfaces, while QuillBot specialises in paraphrasing selected text.
Looking for more options? Browse our full AI writing tools directory, or compare Compose AI with the alternatives linked above.
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