Skip to content

Browser Ext.Compose AI

Compose AI

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.

Pros & cons

  • Inline autocomplete anywhere you type
  • Drafts full emails from one instruction
  • Free core tier
  • Custom text-expansion shortcuts
  • Chromium browsers only
  • Best for short-form writing, not long docs
  • Personalization features gated to premium

Tags

Further reading

View all Browser Ext.
  • View Monica details
    Browser Ext.FREEMIUM

    Monica

    Monica

    All-in-one AI assistant sidebar for any browser tab.

    Monica is an all-in-one AI assistant that lives in a browser side-panel and across mobile and desktop apps, bundling chat, search, writing, translation, and page or video summarization. It aggregates many frontier models — plus image and video generation — into one subscription that works alongside any webpage.

    Worth knowing

    Built by Butterfly Effect, the Chinese startup that later launched the viral autonomous agent Manus.

    • browser
    • side-panel
    • all-in-one
    • multi-model
  • View MaxAI details
    Browser Ext.FREEMIUM

    MaxAI

    MaxAI.me

    All-in-one in-browser AI assistant. Multi-model.

    Same shape as Sider — multi-model AI sidebar that follows you across the web. Strong on quick actions (summarise, rewrite, translate) and saved prompt templates.

    • browser
    • sidebar
    • multi-model
    • quick-actions
  • View Merlin AI details
    Browser Ext.FREEMIUM

    Merlin AI

    Foyer

    Multi-model AI assistant in a browser side-panel, on any tab.

    A Chrome extension and web app that opens a Claude / GPT / Gemini / DeepSeek panel on any page (Ctrl/⌘+M) to summarize articles, chat with PDFs, draft replies on Gmail and LinkedIn, and answer alongside Google results. One subscription spans many models on a shared query-credit allowance.

    Worth knowing

    Built by Foyer (founded 2021); backed by HubSpot co-founder Dharmesh Shah and Better Capital, with ~$7M raised.

    • browser
    • side-panel
    • multi-model
    • summarize
    • +1
  • View Wordtune details
    WritingFREEMIUM

    Wordtune

    AI21 Labs

    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.

    Worth knowing

    Maker AI21 Labs discontinued development of Wordtune in April 2025 as it pivoted from consumer products to its enterprise Maestro platform.

    • paraphrasing
    • rewriting
    • summarization
    • editing