Data month 2026-09

Plume AI

Writing

AI Writing

On-demand grammar checking and AI rewriting for any web text field

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According to AlphaMoat, as of 2026-09, the Chrome extension Plume AI has 15 users (-21.1% MoM) — ranked #8,138 of 9,324 AI browser extensions, and #657 of 744 in Writing.

Users · 2026-09

15-21.1%

Rating

Overall Rank (9,324)

#8,138

Writing Rank

#657/ 744

What is Plume AI

From the Chrome Web Store

On-demand grammar checking and AI rewriting for any web text field Your personal writing assistant powered by your choice of AI provider. Check grammar, rewrite for impact, translate to any language—all without leaving your browser.

**Key Features**

Grammar checking with inline error highlights and one-click "Fix all"
AI rewrite (Polish) for full text or selection
Tone presets: Shorter, Formal, Direct, Technical
Translate to any supported language
Manual mode: check text on demand instead of auto-detecting
Built-in PII anonymization (emails, phone numbers) before AI calls
Per-site permissions: grant access site-by-site in the popup
Disabled domains blocklist to skip certain sites
Keyboard shortcut: Ctrl+Shift+G (or MacCtrl+Shift+G on Mac)
Model selection: choose which model each AI provider uses
Test connection button to validate your API key

**Supported AI Providers**

Gemini (Google)—free tier available
Claude (Anthropic)
ChatGPT (OpenAI)
Mistral
Ollama (local/self-hosted)

**Privacy First**

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You bring your own API key. No data collection. Your API keys are stored locally on your device and never leave except in direct requests to your chosen provider. We don't proxy, log, or store anything. All features work entirely offline on your device.

**How It Works**

1. Install the extension and open the popup 2. Choose an AI provider and enter your API key (required) 3. Focus any text field on any website and click the ✦ button (or press Ctrl+Shift+G) 4. Choose your action: check grammar, rewrite, or translate 5. Review and accept the AI's suggestions with one click

**Open Source**

Plume AI is open source. Inspect the code on GitHub to verify exactly what it does: [https://github.com/tsouef/plume-ai](https://github.com/tsouef/plume-ai)

**Languages Supported**

English, British English, French, German, Spanish, Dutch, Portuguese (Portugal), Portuguese (Brazil), Chinese, Arabic, Farsi, Japanese