If you have a podcast with a valid RSS feed and at least one public episode or trailer you can submit to Simplecast Creator Connect, via the sign-up page here: https://www.simplecast.com/stitcher.
 
Please be advised if you are trying to update the rss feed url on file for your show that this can be done via your Creator Connect dashboard.  You should not submit an updated rss feed url as a brand new show.
 
Once you successfully complete the submission process you will be sent an email with a link to enable your show. If we detect a duplicate show that matches content already found on our platform, this will be flagged during the show submission process. You can email support@simplecast.com with any questions.