Substack

Substack operates a two-sided creator media platform. On one side, it provides creators and small publishers with hosted publishing, email delivery, audience management, billing and discovery tools. On the other, it aggregates reader attention across email, web and app experiences, which supports both subscription conversion and advertising demand. Value is created by reducing the operational burden on creators while aligning platform revenue with creator monetisation outcomes.

Substack is a private US publishing platform that enables independent writers, journalists, podcasters and other creators to publish newsletters and web posts, manage subscribers, process payments and distribute content through email, web and mobile surfaces. Its core offer combines publishing tools, subscriber management, billing, discovery and community features in one system, while allowing creators to retain ownership of their mailing lists and intellectual property.

The company makes money primarily by taking a percentage of paid creator subscription revenue rather than charging an upfront software fee. It also generates marketplace revenue through StackAds, which connects advertisers with Substack publishers for newsletter-native sponsorships and takes a platform fee on those deals. Its direct customers are creators and publishers monetising audiences, as well as advertisers buying newsletter sponsorship inventory; readers use the consumer app and publication websites to consume content.