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Privacy Policy

LumenWrite
Last Updated: January 6, 2026
Effective Date: January 6, 2026

Introduction

LumenWrite ("we", "our", or "the Extension") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, store, and protect your information when you use our Chrome browser extension.

By using LumenWrite, you agree to the practices described in this Privacy Policy.

Overview

LumenWrite is an AI-powered writing assistant that helps you improve your writing across the web.

Key Points:

  • Text you submit is processed by our AI service to provide writing assistance
  • We do not permanently store the text you submit for processing
  • Settings and preferences are stored locally in your browser
  • We use Google Sign-In for secure authentication
  • We do not sell your data or show advertisements

Information We Collect

Account Information

When you sign in with Google, we receive:

  • Email address: Used for account identification
  • Name: Used for personalization
  • Profile picture: Displayed in the Extension UI

Text Content

When you use LumenWrite to improve your writing:

  • Input text: The text you submit for grammar correction, improvement, or translation
  • Mode selection: Whether you chose grammar, improve, or translate mode
  • Language preferences: Your selected target language for translation

Important: Text is processed in real-time and is not permanently stored on our servers.

Usage Information

  • Feature usage (which modes you use)
  • Weekly usage counts (for limit tracking)
  • Error logs (for debugging, with sensitive data redacted)

Local Storage

The Extension stores the following locally in your browser:

  • Authentication tokens (for staying signed in)
  • User preferences (language, mode defaults)
  • Blocked sites list (sites where you've disabled the Extension)

Permissions We Request

Permission Purpose
activeTab To detect and interact with text fields on the current page
storage To save your preferences and settings locally
identity To enable Google Sign-In authentication

How We Use Your Information

Core Functionality

  1. Text Processing: Send your text to our AI service for grammar correction, improvement, or translation
  2. Authentication: Verify your identity and manage your account
  3. Usage Tracking: Monitor usage for limit enforcement
  4. Personalization: Remember your language preferences and settings

Service Improvement

We may use aggregated, anonymized data to:

  • Improve our AI models and service quality
  • Identify and fix bugs
  • Understand feature usage patterns

Data Processing and Storage

Text Processing

When you submit text for processing:

  1. Your text is sent securely (HTTPS) to our Cosmos API
  2. The AI processes your text and generates a response
  3. The response is sent back to your browser
  4. Your text is not permanently stored after processing

Local Storage

Settings and preferences are stored locally in your browser using Chrome's storage API. This data:

  • Never leaves your browser unless you sync Chrome data
  • Can be cleared by uninstalling the Extension or clearing browser data

Account Data

Your account information (email, subscription status) is stored on our servers to:

  • Manage your account
  • Track usage limits
  • Process subscriptions

Data Sharing and Disclosure

We Do NOT Sell Your Data

LumenWrite DOES NOT:

  • Sell your personal information to third parties
  • Share your text content with third parties for their marketing
  • Display advertisements
  • Use tracking pixels or third-party analytics

Service Providers

We work with the following service providers:

  • Google: For authentication (OAuth 2.0)
  • AI Infrastructure: For processing text requests
  • Payment Processors: For subscription management

These providers only receive information necessary to perform their services and are bound by confidentiality obligations.

Legal Requirements

We may disclose information if required by law or to:

  • Comply with legal processes
  • Protect our rights and safety
  • Prevent fraud or security issues

Third-Party Services

Google Sign-In

Cosmos API

  • Purpose: AI-powered text processing
  • Data Sent: Text content for processing
  • Data Retention: Text not permanently stored

Data Retention

Text Content

Text submitted for processing is not permanently stored. It is processed in real-time and discarded after the response is generated.

Account Data

Account information is retained while your account is active. Upon account deletion:

  • Your account data is deleted from our servers
  • Local browser storage is cleared when you uninstall the Extension

Usage Data

Usage statistics (like weekly counts) are retained for service operation and reset periodically.

Your Privacy Rights

You have the right to:

  1. Access: View your account information in the Extension settings
  2. Correction: Update your preferences and settings
  3. Deletion: Delete your account and associated data
  4. Portability: Request a copy of your account data
  5. Opt-out: Disable the Extension on specific sites

Deleting Your Data

To delete your data:

  1. Local data: Uninstall the Extension or clear browser data
  2. Account data: Contact us at support@cosmosone.cloud

Security

We implement security measures to protect your information:

  • Encryption: All data in transit is encrypted using HTTPS/TLS
  • Authentication: OAuth 2.0 with PKCE for secure sign-in
  • Token Management: Automatic token refresh and secure storage
  • Logging: Sensitive data redacted from logs

Children's Privacy

LumenWrite is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13.

International Users

LumenWrite is available worldwide. Your data may be processed in countries where our servers are located. By using the Extension, you consent to such processing.

Website Interactions

LumenWrite operates on websites you visit. Important notes:

  • The Extension only activates when you interact with it (click button or use shortcut)
  • It does not read or store content from pages you browse
  • You can disable the Extension on specific sites via the blocked sites feature

Changes to This Privacy Policy

We may update this Privacy Policy to reflect:

  • Changes in our practices
  • New features or functionality
  • Legal requirements

Notification: Significant changes will be announced via the Extension or our website.

Contact Information

If you have questions about this Privacy Policy:

Email: support@cosmosone.cloud
Subject Line: [LumenWrite Privacy]
Website: https://cosmosone.cloud

Response Time: Within 5 business days

Summary

Aspect Details
Text processing Sent to AI, not permanently stored
Settings storage Local browser storage only
Authentication Google OAuth 2.0
Data selling Never
Advertisements None
User control Full control over data and settings