First-party data
First-party data is the data you collect from your own audience through your own surfaces (site events, CRM records, order history) under your direct relationship and consent.

First-party data is the data you collect from your own audience through your own surfaces: website and app events, CRM records, order history, email engagement, support conversations. It's defined by the relationship (your customer, your property, your consent), which is why it survives the browser and policy changes that keep degrading everything bought or borrowed.
#The party is the relationship, not the data type
First vs third party says nothing about what the data is and everything about who collected it and under whose consent. The same email address is first-party in your CRM and third-party in a purchased list. That's also why first-party data is durable where third-party mechanisms decay: no browser deprecation can take away your own order history. One warning earned from practice, though: collecting first-party data without connecting it is hoarding, not strategy. Site events, CRM contacts, and orders that never meet in one place answer no question; the value appears when an identity map stitches them into one customer record that ad platforms and models can use.
In practice: that connected form is exactly what Buron operates. A first-party pixel collects on your domain, CRM and store feeds arrive, and an identity map stitches them in your warehouse.
The full operating model (anatomy, the honest CDP question, and how first-party data becomes usable signal) is First-party data: the definition and the operating model. The stitching mechanics live in Identity resolution, and the conversion-signal territory routes from Conversion tracking & signal quality.
Related terms
Identity resolution
Identity resolution (user stitching) connects events and records carrying different identifiers (hashed email, user ID, click ID, device ID) into one person, so marketing data can be matched across sources.
Third-party cookies
Third-party cookies are cookies set by a domain other than the site you're visiting: the mechanism behind cross-site ad targeting and view-through measurement, blocked by Safari and Firefox and retained by Chrome.
Tracking pixel
A tracking pixel is a tiny image or script that fires an HTTP request when a page loads or an event happens, carrying the URL, referrer, timestamp, and identifiers back to a collection server.