Definition
A subscription newsletter and publishing platform that enables writers, journalists, and creators to publish email newsletters and build paid subscriber businesses directly. Substack handles payment processing, email delivery, and subscriber management, taking a 10% cut of subscription revenue. For creator-writers, Substack represents one of the most prominent owned-audience platforms available — subscribers opt in directly to a creator's list, reducing dependence on social media algorithms. Substack has expanded beyond newsletters to include podcasts, video, and community features.