Privacy Policy

Overview

StackSee is a comprehensive web technology detection platform that helps developers and businesses identify the technologies, frameworks, libraries, and tools used by any website. We offer multiple ways to access our technology detection services, including a browser extension, web application, and API. This privacy policy explains what data we collect, how we use it, and your rights.

Data Collection

What We Collect

When you use StackSee services (browser extension, web application, or API), we collect:

1. Domain Names: The domain names of websites you analyze (e.g., "example.com")
   • Browser extension: When automatic background analysis is enabled, or when you manually click the extension icon
   • Web application: When you submit a domain for analysis
   • API: When you make an API request to analyze a domain
   • We do NOT collect full URLs with paths (e.g., we never see "/checkout" or "/login")
   • We do NOT collect query parameters or sensitive URL data
2. Analysis Results: Technology detection results for domains you analyze
   • Browser extension: Cached locally in your browser for 7 days
   • Stored on our servers for 7 days to improve performance across all services
3. Account Information (optional, for registered users only):
   • Email address (for account management and notifications)
   • Username (for identification)
   • Usage statistics (API call counts, rate limits)

What We Do NOT Collect

• ❌ Personal information beyond account registration (if you choose to create an account)
• ❌ Full URLs or browsing paths
• ❌ Page content or form data
• ❌ Login credentials
• ❌ Payment information (payment processing handled by third-party providers)
• ❌ Browsing history beyond domain names you explicitly analyze
• ❌ IP addresses (except temporarily for rate limiting and security)

How We Use Data

Domain Names

Domain names are sent to stacksee.com to:

• Detect which technologies the website uses
• Cache results for faster future lookups
• Provide instant analysis when you click the extension icon

Analysis Results

Technology detection results are:

• Displayed in the browser extension popup, web application, or returned via API
• Cached locally in your browser (7 days, browser extension only)
• Cached on our servers (7 days) for performance across all services
• Never sold or shared with third parties

Account Information

If you create an account, we use your information to:

• Provide account management and authentication
• Track API usage and enforce rate limits
• Send important service notifications (with your consent)
• Improve our services and user experience

Privacy Controls

You Have Full Control

Browser Extension Users

1. Disable Automatic Analysis
   • Open extension settings
   • Toggle off "Automatic Background Analysis"
   • Extension will only analyze when you manually click the icon
2. Clear Cache
   • Extension settings → Clear cache
   • Removes all locally stored analysis results
3. Incognito Mode
   • Automatic analysis is always disabled in incognito/private browsing
   • You must manually click the extension to analyze
   • Results are not saved in incognito mode
4. Do Not Track (DNT)
   • We respect the DNT browser setting
   • If DNT is enabled, automatic analysis is disabled
5. Uninstall
   • Uninstalling the extension removes all local data
   • Server-side cache expires after 7 days

All Users

1. Account Management
   • View and update your account information
   • Delete your account and associated data
   • Manage email notification preferences
2. Data Requests
   • Request a copy of your data
   • Request deletion of your data
   • Contact [email protected] for data-related requests

Data Storage & Security

Local Storage (Browser Extension Only)

• Analysis results cached for 7 days
• Settings stored locally
• Total storage: <5MB typically
• Cleared when you uninstall the extension

Server Storage (stacksee.com)

• Domain analysis results cached for 7 days
• Account information (email, username) stored until account deletion
• API usage statistics and rate limit data
• Automatically deleted after retention periods expire
• Stored securely with industry-standard encryption

Security Measures

• HTTPS encryption for all API requests
• No tracking cookies
• Rate limiting to prevent abuse
• Regular security audits

Third-Party Services

We do not share your data with third parties. The only data transmission is: Your browser → stacksee.com (for technology detection) and stacksee.com → Your browser (detection results)

We use:

• Railway.app for hosting (infrastructure provider)
• Cloudflare for CDN and DDoS protection (network provider)

These providers may see domain names in server logs but do not have access to our database.

Rate Limiting

To ensure fair usage and prevent abuse, we implement rate limits across all our services:

• Free users (web app and extension): Limited number of domain analyses per hour
• Free API tier: Limited API requests per hour/day
• Paid plans: Higher limits based on subscription tier
• Rate limiting based on:
  • IP address (anonymous users and browser extension)
  • Account ID (registered users and API clients)
• IP addresses are not stored beyond rate limit enforcement

Children's Privacy

StackSee is not directed at children under 13. We do not knowingly collect data from children.

GDPR Compliance (EU Users)

If you're in the European Union:

Legal Basis

We process domain names based on legitimate interest:

• Providing the technology detection service you requested
• Improving service performance through caching

Your Rights

You have the right to:

• Access: Request what data we have about you
• Deletion: Request deletion of your data
• Portability: Export your data
• Object: Object to data processing
• Withdraw Consent: Disable automatic analysis anytime

Exercising Rights

To exercise your rights:

• Browser extension: Disable automatic analysis or clear cache in settings (immediate)
• Account: Manage or delete your account in account settings
• Contact us at [email protected] for data requests

CCPA Compliance (California Users)

California residents have the right to:

• Know what personal information is collected
• Delete personal information
• Opt-out of "sale" of personal information (we do not sell data)

We Do Not Sell Your Data - Ever.

Changes to This Policy

We may update this privacy policy to reflect:

• Changes in our practices
• New features or services
• Legal or regulatory requirements

You will be notified of major changes through:

• Extension update notification
• Notice in extension settings
• Email (if you have an account)

Contact Us

Questions about privacy?

• Email: [email protected]
• Website: https://stacksee.com/privacy-policy
• Support: https://stacksee.com/support

Browser Extension Compliance

Our browser extension complies with Chrome Web Store and browser extension policies:

• ✅ Single Purpose: Technology detection only
• ✅ Privacy Policy: This document
• ✅ User Control: Toggle to disable automatic analysis
• ✅ Incognito Mode: Automatically disabled
• ✅ Minimal Permissions: Only what's necessary
• ✅ Transparent: Clear about data collection

Data Retention Summary

Your Consent

By using StackSee services, you consent to:

• Sending domain names to stacksee.com for analysis
• Caching results on our servers (7 days)
• Our use of data as described in this policy
• If you create an account: storing your email and account information

You can withdraw consent anytime by:

1. Browser extension: Disabling automatic analysis in settings or uninstalling the extension
2. Web application/API: Deleting your account (if registered) or stopping use of the service

Version: 2.0
Effective Date: October 27, 2025
Last Reviewed: October 27, 2025

For the most current version, visit: https://stacksee.com/privacy-policy