Jan 28, 2021 · Yes, in the sense that every company that offers subscription email newsletter services is a competitor, including MailChimp, TinyLetter, and others. And according to a Times report, Twitter tried to acquire Substack at some point last year, but was rebuffed—which suggests that it very much wants to be in that business..
Web. Twitter's foray into newsletter subscription was touted as a Substack killer. Several leading journalists have set up shop on Substack, with some of their newsletters fetching top dollar in subscription revenue. Heather Cox Richardson's U.S. politics newsletter is estimated to be worth about $1 million in annual revenue.