Better tracking with expanded UTM filtering

Hey folks! We've made it way easier to figure out where your subscribers are coming from:

• You can filter your subscriber list by UTM parameters (source, medium, and those other tracking bits)
• Full API support for all these new filtering options, too
• While we're on the topic, we've also added a new filter for unsubscription reasons (which of course is the other end of the funnel, but still.)

If you add UTM parameters to your subscribe links (like ?utm_source=twitter&utm_medium=social&utm_campaign=spring2025), you can now slice and dice your subscriber list to see what's working best.

Want to know if Twitter followers open more emails than Instagram followers? Or which link in your Twitter bio brings in more paid subscribers? Now you can find out with just a few clicks.

These filters are super helpful for figuring out what's actually driving growth, so you can do more of what works and less of what doesn't. Check them out next time you're on the subscribers page!