How to run Atribusi without a visitor cookie

Cookieless mode keeps the visitor ID in memory for the current tab. It does not write an ID to localStorage or a cookie.

Add this attribute on the tracker script:

data-cookieless="true"

Users are distinct in-memory visitor IDs. A new tab is a new user. Sessions still last 30 minutes idle inside that tab. This mode cannot share a user across subdomains. Use this when you need first-party analytics without a stored identifier.