Compose AI

by Compose AI

Chrome-native AI copilot that autocompletes and rewrites wherever you type

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About

Compose AI is a Chrome extension that accelerates writing across the web by autocompleting sentences and generating text on command. Whether you’re drafting emails, documents, or social media posts, Compose AI provides GPT-powered suggestions that learn your personal style over time. Key features include one-click email replies, text rephrasing, and instant grammar fixes—all integrated anywhere you write online. It claims to cut writing time for professionals by about 40% by continuously offering relevant completions and personalized phrase suggestions as you type. Login/Access: Requires signup with Google or email to sync preferences and usage; operates as a browser extension and works wherever you compose text. Model & Features: Compose AI is powered by OpenAI’s language models (GPT-3.5/4 via API) for autocomplete, rephrase, and reply functions. The system keeps all user data private, using your input only for personalization. Pricing: - Basic Plan: Free forever, including 1,500 AI-generated words/month, 25 rephrases, 10 email drafts, and 50 smart autocompletes to help you try AI writing assistance in your workflow. - Premium: $14.99/month (increased from $9.99 in 2025, annual billing), offering 25,000 words, unlimited rephrasing and autocomplete, priority support, and early feature access. - Ultimate: $44.99/month (increased from $29.99 in 2025, annual) for unlimited AI-generated text, unlimited features, and dedicated support. - Enterprise: Custom pricing for organizations seeking volume discounts and team-wide deployment. All paid plans come with a 7-day free trial. Compose AI is a lightweight productivity booster, seamlessly weaving AI writing assistance into daily web-based workflows for individuals and teams.

What you can do with it

  • Draft and reply to business emails directly in Gmail using autocomplete and one-click AI-generated responses
  • Generate blog paragraphs and article sections in Google Docs by typing // and giving a short prompt
  • Rephrase sales outreach or customer support messages to be more formal, friendly, shorter, or longer
  • Create marketing copy and product descriptions for landing pages or e-commerce listings from a few bullet points
  • Speed up responses in web-based chat and messaging tools by using autocomplete and quick AI suggestions

Pricing

Basic — Free, 1,500 AI-generated words per month, core autocomplete and basic features
Premium — $9.99/mo, higher AI word limits and advanced personalization features
Ultimate — $29.99/mo, expanded usage limits and additional advanced capabilities
Enterprise — Custom pricing based on needs, tailored limits and organizational features

How to access

Access via the Compose AI Chrome extension, installed from the Chrome Web Store, with open signup on compose.ai using an email-based account; once installed, it embeds into web editors like Gmail, Google Docs, and other browser text fields, invoked via keyboard shortcuts (e.g., // to generate text, Tab to accept autocomplete) or contextual menus; enterprise customers engage via direct sales contact through the website.

Install the Compose AI Chrome extension from the Chrome Web Store, then sign up or log in with an email-based account linked to compose.ai; once enabled, the assistant works across supported web apps (e.g., Gmail, Google Docs, WhatsApp Web) via keyboard shortcuts like typing // or pressing Tab for autocomplete; enterprise access requires contacting sales via the website.

Tips for getting the best results

Install the Compose AI Chrome extension, pin it to your toolbar, and ensure it is enabled for the domains where you write most often, such as Gmail and Google Docs. When composing text, type "//" to open the AI generation interface and describe what you need (for example, "draft a friendly follow-up email" or "write a short product description"), then refine the output by editing or regenerating as needed. Use Tab to accept autocomplete suggestions inline while you type routine phrases, subject lines, and boilerplate text, paying attention to how the model learns your preferred wording over time. Highlight existing text to use the Rephrase feature, choosing options like more friendly, more formal, shorter, or longer to quickly adapt tone for different audiences. For email-heavy workflows, experiment with the one-click reply and "Compose Now" shortcuts so that you can rapidly generate responses that reference the original thread, then lightly edit for accuracy before sending. New users are often tripped up by forgetting to type "//" or press the relevant shortcut inside supported editors, or by hitting rate and word limits on the free tier, so it helps to review the product overview and keep an eye on usage if you rely on it heavily.

Known limitations

Compose AI currently runs as a Chrome extension, so it is limited to Chromium-based browsers and web environments and does not natively cover desktop or mobile apps outside the browser. As with other large language model tools, generated text can sometimes be generic, factually inaccurate, or misaligned with brand-specific tone, requiring human review and editing before use. Free-tier users face word limits and may not access all personalization features, so heavy writers or teams may need paid plans to avoid hitting caps. The assistant depends on the context available in the current text field or email thread, which means it may not fully account for broader project-specific knowledge unless you include it explicitly in your prompts. Organizations with strict compliance or data-governance requirements may need to scrutinize the Terms of Service and data-handling practices, since details about training data sources and long-term model retention policies are not exhaustively documented publicly.

Model / Technology

GPT-style large language model backend integrated into a Chrome extension

Commercial use

The Terms of Service state that users retain rights to their own content and that Compose AI provides services "as is" without taking ownership of user data, but the terms do not explicitly spell out detailed licensing of AI outputs for commercial use; in practice, it functions as a writing assistant that professionals use in commercial contexts, yet users should review the latest Terms of Service and any business agreements to confirm rights and compliance for their specific use cases.

Training data

Compose AI does not publicly disclose detailed training data sources; as an AI writing assistant it likely relies on large language models trained on a mixture of web text, licensed or third-party data, and proprietary fine-tuning focused on writing assistance, but no specific datasets or controversies are detailed in its public-facing materials.