USE CASE:
Podcast hosts: newsletter detection without the guesswork
What follows is the honest set of ways to get newsletter detection on podcast hosts, including the ones that are not ours. Mamba Labs writes Apify actors for work like this, and Link in Bio Newsletter Checker is the one that reads podcast hosts.
Last updated October 6, 2026
What is actually going wrong
Podcast hosts and newsletter detection: one at a time is fine, and a list of them is not. Podcast hosts measure their audience in downloads that only the host and the hosting platform can see, and newsletter detection inherits that. Worth knowing about podcast hosts, since newsletter detection inherits it: no public number exists for podcast audience size, so every estimate is an estimate. Link in Bio Newsletter Checker carries 1 ready made setup for newsletter detection on podcast hosts.
Traditional Search Tools
- Apple Podcasts and Spotify charts, for podcast hosts. Free, and chart position is the only public proxy for size.
- Substack and beehiiv discovery pages. Each platform lists its own writers by category. Free, and blind to every creator on a different platform or a self hosted list.
- SparkLoop and newsletter ad networks. They know the newsletters in their own network, with audience sizes. The network is the boundary, and most creators are outside it.
- Asking the creator. The answer is accurate and the list size is often generous. It takes a conversation per creator, which is exactly what a list was meant to avoid.
- Click through every link page. Open the link in bio for each creator and look for a signup form or a link to Substack, beehiiv or Kit. Note the platform. Two to four minutes a creator, longer when the link page needs a browser to load.
Mamba Labs Apify Actors
These are the actors we built for this job. If yours is not covered here, search from the bar at the top of the page or contact us here and tell us what you need.
- Link in Bio Newsletter Checker1 preconfigured task on this page's job.
Preconfigured tasks
A task is one of these actors with the inputs already filled in for a specific version of this job. Open one, swap in your own list, and run it without setting anything up from scratch.