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Cookie Policy

How we use cookies and similar technologies

Last updated: October 3, 2026

This policy explains how Postmarkr uses cookies and similar technologies. For more information about how we handle your data, see our Privacy Policy.

What Are Cookies

Cookies are small text files stored by your browser when you visit a website.

They help websites remember your preferences and provide functionality like keeping you logged in.

Cookies We Use

Essential cookies: Required for the site to function. Cannot be disabled.

  • Authentication session cookies (keeping you logged in)
  • CSRF protection tokens (security)
  • These expire when you log out or after 30 days

Analytics and similar technologies: Help us understand how the site is used.

  • Vercel Web Analytics (anonymous visitor and page-view data)
  • PostHog product and performance analytics (page views, CTA events, and Web Vitals)
  • PostHog runs through our first-party postage.postmarkr.com endpoint

Local storage: We store a first-touch attribution record in pmr_first_touch(first landing page, referral domain, and UTM parameters) to understand acquisition sources.

Third-Party Cookies

Stripe: May set cookies during payment checkout for fraud prevention.

We load no ad-platform pixels. For account holders, we send verified signup and confirmed purchase details directly to OpenAI. We also may send confirmed purchase details directly to Google using a hashed version of your account email, a valid saved Google ad click reference, or both. Google email matching does not require an ad click cookie. Verified-signup and checkout-start details use a valid saved Google ad click reference. Microsoft verified-signup, checkout-start and purchase details use a valid saved Microsoft ad click reference without email matching, as described in our Privacy Policy.

Advertising Measurement

When you arrive from one of our ads, our server stores the ad click reference in a cookie, pmr_click, for up to 30 days. Page scripts cannot read it. If you create an account in that time, we attach that one reference to your account so we can tell which ads brought us customers; otherwise it expires unused. Global Privacy Control or Do Not Track stops it being set. Account holders can turn off advertising measurement in Settings.

Managing Cookies

You can manage cookies through your browser settings. Check your browser's help documentation for instructions.

Note: Disabling essential cookies will prevent you from logging in and using the service.

Updates

We may update this policy from time to time. Changes will be reflected by the "Last updated" date at the top of this page.

Contact Us

Questions about this policy? Email hello@postmarkr.com.