We built Castlytics to solve a problem we kept hearing from brands: podcast and creator campaigns are expensive, but almost impossible to measure properly. Tracking links help, but they miss everyone who types the URL manually. Promo codes help, but they don't capture the full picture. Post-purchase surveys fill in some gaps, but analysing them is manual work.

For a single brand running a handful of campaigns, that was already a meaningful problem. For agencies managing creator campaigns across five, ten, or twenty clients simultaneously, it was a different level of painful.

Today we're announcing that Castlytics is now built for agencies too.

Third-party cookies have been deprecated or blocked in Safari and Firefox for years. Chrome's phase-out is ongoing. The advertising industry has spent years panicking about what this means for attribution.

For podcast advertisers, the news is mostly good: the best podcast attribution methods were never dependent on third-party cookies in the first place.

Here's how cookie-free podcast attribution works.