Substack Becomes Creator Network

Substack’s real moat is shifting from publishing software to demand aggregation. Email tools are easy to swap, but a writer is less likely to leave when discovery, one click paid conversion, and cross promotion all happen inside the same app. Reader, Notes, recommendations, and Explore turn isolated newsletters into a shared feed, which lets Substack lower writer acquisition costs while keeping more of the best creators on platform.1 2 3 4

• The network matters because Substack charges on reader spend, not software seats. With estimated revenue reaching $45M in mid 2025 on roughly $450M of GMV and more than 5M paid subscriptions, every extra follow, free subscriber, and in app upgrade can compound into payment volume across many writers.4 5
• This is also a retention defense against Beehiiv, Kit, and Ghost. A top writer can save money by moving to lower fee or SaaS tools, so Substack has to offer traffic and conversion help that travels poorly. Internal one click checkout and in network recommendations are the concrete features that make the 10% fee easier to justify.1 2 6 7
• Competitors are building different networks. Beehiiv is leaning into ads and referral growth for newsletter operators, while Kit is expanding toward a broader creator operating system. Substack is narrower and more opinionated, centered on writers and media personalities, but that focus helps it build a consumer reading destination instead of just a back end tool.3 6 7 8

The next phase is turning more reader attention into more monetization paths per creator. As audio, video, ads, and app based subscriptions grow, Substack is moving toward being the default consumer layer for independent media, where owning discovery and checkout matters more than owning the newsletter editor.4 5 9