Not exactly an answer to your question, but as someone who recently went through the process of launching a podcast, I found Fin Moorhouse's Advice for starting a podcast very helpful.

Keiran Harris kindly replied to an email: "app called Forecast to create the chapters (I think it's only available on mac). And then we use Wordpress for the website, and our podcast hosts are 'Backtracks' and 'Transistor' (for 80k After Hours / the compilation feeds) — and they send the episodes out to all the podcasting apps."