Castmark is a productivity and link management tool designed specifically for podcasters. It solves the ongoing challenge of managing sponsor URLs across back catalogs by providing one durable redirect link per sponsor. Podcasters can paste this link into their show notes across every episode once, eliminating the need to manually update past show notes whenever an affiliate link or sponsor destination changes.
When a sponsor updates their landing page or tracking campaign, podcasters simply update the destination URL within Castmark. The change immediately takes effect across all past and future episodes. Beyond dynamic link management, Castmark features granular analytics. Every click is logged by device, referrer, and timestamp, and aggregated per sponsor, campaign, and episode. This detailed attribution allows podcast creators to demonstrate exact click performance to advertisers without guesswork.
Castmark is a link management and analytics tool for podcasters that provides a single, permanent redirect link for each sponsor to place in episode show notes.
When a sponsor changes their URL, you update the destination directly in Castmark. Every episode—past, present, and future—pointing to that Castmark link will update instantly without needing to edit your show notes.
Castmark logs click data including device type, referrer, and time. These metrics are rolled up by sponsor, campaign, and episode so you can see precisely which episodes drive engagement.
Castmark was created by Michael Mangialardi.
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