Business How to start a business newsletter on Substack Ana LopezDecember 19, 20220402 views Opinions expressed by businessroundups.org contributors are their own. By now you have undoubtedly come across a few Substack newsletters. More than just a publishing site, Substack allows you to set up paid subscription options and collect credit and debit card payments through its partnership with Stripe. Most Substack-centered how-to articles focus on its usefulness to writers and other creators. It may not be immediately obvious what a small business or startup can do with a Substack newsletter.