Cookie Policy

Effective Date: September 19, 2026
Last Updated: September 19, 2026

This Cookie Policy explains how Exponential Industry (“we,” “us,” or “our”) uses cookies, local browser storage, and related technologies on exponentialindustry.com. It outlines what these technologies are, how we use them, and your options to manage your preferences in accordance with applicable global privacy standards (including the EU ePrivacy Directive, GDPR, UK PECR, UK GDPR, California CCPA/CPRA, and Canadian PIPEDA).


We believe in privacy by design. We do not use third-party tracking pixels, cross-site advertising networks, or non-essential cookies on page load:

  • Strictly Necessary Session Cookie (ei_session): When you sign in to your account using our passwordless email authentication, our edge infrastructure sets a first-party HTTP cookie (ei_session). This cookie contains a cryptographically signed HMAC-SHA256 session token to keep you logged in, verify your subscription status (paid vs. free), and protect against unauthorized account access.
    • Security Attributes: Configured strictly with HttpOnly (inaccessible to browser scripts), Secure (transmitted solely over encrypted HTTPS connections), and SameSite=Lax (defending against Cross-Site Request Forgery).
    • Legal Exemption: Under Article 5(3) of the EU ePrivacy Directive and UK PECR Regulation 6(4)(b), authentication cookies strictly necessary to provide a service explicitly requested by the user are exempt from prior consent, but must be fully disclosed.
  • First-Party Local Storage (localStorage): We use browser localStorage solely to remember essential user preferences:
    • theme: Stores your preferred color scheme (light or dark).
    • ei_cookie_consent: Remembers your cookie and privacy choices across visits.
  • Privacy-Enhanced Media Embeds: Embedded videos and social content use Click-to-Load facades (including youtube-nocookie.com), completely blocking third-party network requests and tracking cookies until you actively interact with the media.

2. Overview of Cookies & Storage Technologies

Identifier / SourceType / OriginPurposeExpirationCategory
ei_sessionFirst-party HTTP Cookie (exponentialindustry.com)Secure passwordless session token & subscription tier verification (paid/free)30 Days (or immediate upon logout)Strictly Necessary
themeFirst-party localStoragePreserves light/dark mode UI display preferencePersistentStrictly Necessary
ei_cookie_consentFirst-party localStoragePreserves your cookie and privacy preferences1 YearStrictly Necessary
YouTube Active StreamThird-party (youtube-nocookie.com)Streams video content only upon explicit user clickSession / 6 MonthsFunctional (User-Initiated)
Twitter / X EmbedsThird-party (platform.twitter.com)Renders interactive tweets only upon user opt-inSessionFunctional (Opt-In)

You have full control over cookie and storage preferences on our site at all times:

  1. Cookie Settings Modal: Click Cookie Settings in the website footer at any time to open the privacy preferences modal. You can toggle optional categories, click “Reject Non-Essential”, or click “Accept All”.
  2. Account Sign-Out: Signing out of your account immediately clears and invalidates the ei_session cookie (Max-Age=0).
  3. Global Privacy Control (GPC): Our site honors browser-level navigator.globalPrivacyControl signals. When GPC is detected, optional non-essential categories are automatically turned off by default.
  4. Browser Controls: You may also configure your web browser to block, reject, or delete cookies. Note that disabling essential cookies may prevent you from signing in to your account. Guides for major browsers:

4. Policy Updates & Contact

We may update this Cookie Policy periodically to reflect changes in our technical implementation, legal requirements, or operational best practices.

For questions regarding our use of cookies or web storage, please contact us at:
Email: privacy@exponentialindustry.com