Privacy / Waitlist

Simple data, limited purpose.

Last updated July 12, 2026.

What is collected

When you join the waitlist, GTM Engineer Playbook stores your normalized email address and the time you joined. The signup record also includes your public IP address, approximate country, region, city and timezone, browser language, browser, operating system, device type, referring site, landing page, waitlist form location and any UTM campaign values. A separate keyed, one-way network-address hash is used for rate limiting and is deleted by a daily cleanup job after it becomes at least 24 hours old.

Why it is collected

Your email is used to send book excerpts, development updates, and the launch announcement. Signup context is used to understand where demand comes from, improve the site and prevent abuse. It is not sold or used for unrelated advertising.

Where it is processed

Form submissions are processed by Vercel Functions and stored in a Neon Postgres database. Both services act as infrastructure providers for this site.

Site analytics

This site uses Vercel Web Analytics to measure anonymous, aggregate page activity. It may record the event time, page path, referrer, approximate location, browser, operating system, and device type. Vercel Web Analytics does not use cookies, and its analytics records are not associated with an individual or IP address.

With your permission, this site also uses Google Analytics 4 to understand page activity and whether the waitlist is working. Google Analytics may record the event time, approximate country, device language, browser, operating system, device category, landing page, referrer, and campaign source. A successful waitlist signup sends a generate_leadevent with the form location. The waitlist integration does not send your email address or form fields to Google Analytics.

Google uses the connection IP address to derive approximate location, then discards it before the data is logged. The raw IP address is not available in Analytics. The Google tag does not load until you choose to allow analytics, and may then store a first-party identifier such as _ga.

Your choice is stored in this browser. You can change it at any time through . Turning analytics off stops future measurement and removes this site's Google Analytics cookies from your browser.

Retention and your choices