Hey Product Hunt, I built Castmark for a common problem for podcasters: a sponsor's URL changes, and now you're hunting through months of show notes trying to update a link that's pasted into 40+ episodes. Castmark fixes this with one idea: paste a single durable link into your show notes once. When the destination changes, you update it in one place and every episode, past and future, points to the new URL instantly. It also tracks clicks by device, referrer, and time, and can attribute those clicks back to the specific episode they came from. So instead of telling a sponsor "I think episode 12 did well," you can show them the actual numbers by episode. It's $19/month with a 14-day free trial, and if you ever cancel, your redirect links keep working. Would love feedback, especially from anyone running sponsor links on a podcast catalog.

Castmark

One sponsor link for your podcast episodes (+ analytics)

One sponsor link for your podcast episodes (+ analytics)