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Lenny's PodcastBuilding Substack | Sachin Monga (Substack, Facebook)
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At a glance
WHAT IT’S REALLY ABOUT
Substack’s Product Playbook: Empowering Writers, Building a Reader-First Network
- Head of Product at Substack, Sachin Monga, discusses how Substack is evolving from a simple publishing tool into a writer- and reader-centric network that reimagines the economics of online writing.
- He contrasts building product at a fast-growing startup versus a giant like Facebook, emphasizing principles, sequencing, and accepting constant change over rigid process.
- A major focus is Substack’s recommendations feature, which routes growth through writer-to-writer endorsements and has become a powerful, principled growth engine without algorithmic feeds.
- Monga also shares advice for aspiring Substack writers, the importance of starting small, and how Substack aims to support sustainable careers and communities around niche expertise.
IDEAS WORTH REMEMBERING
5 ideasPrinciples, not algorithms, drive Substack’s product decisions.
Substack optimizes for writer and reader control—avoidance of opaque recommendation algorithms, ownership of email lists, and optional features—rather than ad-driven engagement metrics.
Orient product teams around customers and timeless problems, not surfaces.
Substack’s product org is split into writer, reader, and growth teams, each focused on enduring user needs, which reduces reorg churn and keeps priorities clearer as the product surface expands.
Startup PMs must be comfortable with constant obsolescence of process.
At Substack’s stage, any planning or execution process is temporary; success means the company changes fast enough that today’s “right way” quickly becomes outdated, demanding continuous adaptation.
Writer-driven recommendations can be a powerful, ‘principled’ growth engine.
Instead of algorithmic “you might like” modules, Substack’s recommendations let writers explicitly endorse other writers, creating a high-trust, high-intent discovery loop that now drives millions of subscriptions.
Sequencing matters when evolving from a tool to a network.
Substack first had to earn trust as a great single-player tool for writers before layering on network effects (like recommendations and an app), enabling more complex, multi-sided experiences without breaking trust.
WORDS WORTH SAVING
5 quotesI really think that we're just starting into this golden era of what it might mean to be a writer on the internet.
— Sachin Monga
Substack's never gonna be the place where you have the biggest audience, but it certainly should be the place where your most valuable audience comes home to.
— Sachin Monga
Doing the thing well means that you're not going to know what you're doing.
— Sachin Monga
If you describe Substack now as simply a newsletter tool, that would be kind of reductive.
— Sachin Monga
There’s no way that I would be doing what I’m doing now if not for Substack.
— Lenny Rachitsky
High quality AI-generated summary created from speaker-labeled transcript.
