Building Substack: Reinventing Culture through Subscriptions

Episode Summary

Executive Summary: The episode explores Substack’s origin story, why email became its core distribution layer, and how Chris Best’s experience scaling Kik shaped a philosophy centered on direct creator-audience relationships, ownership, and monetization. Best argues AI will massively lower content creation costs, making curation, trust, and human identity even more valuable, while Substack expands into app-based discovery, podcasts, video, and AI-powered creation tools.

Main Topics: From Kik to Substack: founder lessons and technical evolution (Priority: 5/5): Chris Best describes his engineering roots, scaling Kik from BlackBerry tinkering into a massive messaging platform, and how that experience taught him about scale, incentives, and product impact. He frames founding as a blend of engineering, management, and user-focused decision-making. Why Substack chose email and direct distribution (Priority: 5/5): Substack intentionally built on email because it offered a direct, app-free relationship with audiences and avoided dependence on social algorithms. Best emphasizes that the product was designed to be simple, frictionless, and aligned with creator autonomy from the beginning. The founding story and early market validation (Priority: 5/5): Best recounts writing a frustrated essay about internet media economics, discussing it with Hamish McKenzie, and turning that into paid newsletters. The first customer generated immediate traction, validating the idea that people would pay for valuable writing. Creator economics and the decline of ad-supported scale (Priority: 4/5): Best argues the era of building billion-user ad-supported consumer products is fading, and that meaningful businesses can now be built around smaller but highly monetizable audiences. He sees deeper monetization as a stronger model for modern media. AI as creative leverage and a structural shift (Priority: 5/5): Best sees AI as the most important technological revolution of his lifetime, primarily because it collapses the cost of producing content and enables new media forms. He believes this will increase supply, but also raise the value of trust, taste, and human relationships. Substack’s next chapter: app, multimedia, and creator tools (Priority: 4/5): With scale established, Substack is moving beyond email into a destination app, podcasting, video, and AI-assisted creation and editing. Best says the company is focused on making it radically easier for creators to publish, monetize, and build audiences. Culture, trust, and what people consume (Priority: 4/5): The discussion returns repeatedly to the idea that media shapes identity. Best argues that in a world of abundant content, the central challenge is not scarcity of content but scarcity of attention and trust in who determines what enters your mind.

Key Arguments: Great writing and culture shape who people become, so the media economy is fundamentally about influence, not just distribution. Substack chose email because it created a direct, low-friction connection between writer and audience without requiring app installs or algorithmic mediation. The first version of the business was intentionally simple—paid newsletters—but it sat underneath a much larger vision of a new economy for creators. The company succeeded because it found a real pain point: creators want ownership, independence, and a way to make money directly from readers. The ad-supported, billion-user internet model is less viable now; modern products can be highly valuable with smaller audiences if monetization is deeper. AI will dramatically reduce the cost of creating high-production content, increasing content abundance and making curation and trust more important. Substack should be judged not just as a newsletter platform but as a social technology for enabling creative independence and new kinds of media businesses. AI-native companies will have an advantage over legacy firms because they can rebuild workflows and organization around new capabilities from day one. The future of media will likely include both AI-generated, experience-driven content and human-guided content that helps people decide who they want to become. Making publishing radically easy, especially at the start, can transform creators’ lives and unlock economic opportunity at scale.

Data Points: Time at Kik: Nearly a decade - Best says he co-founded Kik and worked on it for nearly ten years before Substack. Kik user growth cadence: Doubled every 4–5 months for several years - Describes the rapid scaling phase of Kik and the strain it created. Teen usage at Kik: About 40% of U.S. teenagers - Best cites this as the scale of Kik’s reach at one point. Kik valuation: $1 billion - He says Kik raised money at a billion-dollar valuation from Tencent. Substack first customer revenue: $100,000 on day one - The first paid newsletter launch instantly generated major revenue. Initial revenue at YC application: $0 (then $100,000 four days later) - They applied with no revenue, then updated YC during the interview process. Current paid subscribers: Over 3 million - Best states Substack has crossed 3 million paid subscribers. Current active users: Tens of millions - Best describes Substack’s broader user base beyond paid subscribers. Creator earnings example: Over $1 million per year - An anecdote about a creator whose Substack income transformed her family life. Monetization example: $5,000 spend test - Andrew Chen mentions asking founders how a user could spend $5,000 in-product, reflecting deeper monetization expectations.

Pivotal Quotes: "The problem you have in a world of abundant content is like, how do I allocate my scarce attention?" — Chris Best: Best explains why content abundance makes curation and trust more important than ever. "Technology is a means to an end." — Chris Best: He argues that Substack chose email and other tools based on product value, not tech prestige. "If what I read is what I become, who do I trust for that?" — Chris Best: This frames the philosophical stakes of media, identity, and audience trust.

Implications: For creators, the opportunity is to own audience relationships and monetize directly. For media companies, AI and abundance make trust, taste, and distribution more important than raw content volume. For Substack, the future is a broader creator platform, not just newsletters.