Founder Playbook · Sub Club by RevenueCat
9 tactics from Seth Miller
Sub Club Podcast: From Bootstrapping Your App to Partnering With Sony - Seth Miller, Rapchat
Watch the full episode“We would be dead for sure if I didn't learn how to code and it's an invaluable skill that I'll have in this organization and future organizations — it also just helps me think about things differently.”
Learn to code — 'we would be dead for sure' without it
Seth Miller started Rapchat in college with no technical background, relied on friends and faculty for early builds, then taught himself to code when he realised he could not afford engineers or wait on fundraising. He credits it as the single most survival-critical decision: without the ability to ship updates himself, Rapchat would have stalled before finding traction. The skill also makes him a more credible and effective technical manager.
“The most important stuff was the qualitative in the early days. You need qualitative at scale — it's not just your friend, it's 50,000 MAUs at that time — and then people were actually able to record music on their phone and share it.”
Early PMF signal is qualitative at scale — not a single metric
Seth Miller's first sign of product-market fit was searching his own app's name on Twitter and finding strangers sharing tracks unsolicited. App Store reviews piled on. He had no formal retention dashboard — just unmistakable organic signals from people who genuinely loved it. His caution: qualitative enthusiasm only counts when it comes from a large enough pool of non-affiliated users, not friends and family.
“Once we learned to actually be like 'no — why are you here, what are your aspirations?' and view things through that lens, that's been one of the biggest unlocks.”
Segment by user aspiration, not just behaviour — blended metrics hide your best persona
For years Rapchat looked at retention and engagement across their entire user base without distinguishing between someone who opened the app for fun and a serious aspiring artist. Once Seth Miller's team started asking 'why are you here?' at onboarding and segmenting by declared aspiration, they discovered their core monetisable persona had retention metrics far above the blended average. That clarity focused the whole product roadmap.
“We made it really simple to post a link to your Rapchat to your Twitter and your Facebook — two ugly square buttons — and that worked. We saw a 10x return on that, and to date that type of flow has driven millions and millions of downloads.”
Adding two share buttons drove a 10x return — viral loops beat paid acquisition
With no paid marketing budget in the early years, Seth Miller's team obsessively refined the share-and-return loop. Adding basic social sharing (originally just Twitter and Facebook buttons) produced a 10x multiplier on installs. Later iterations auto-generated shareable video of each track — which became the app's most-used feature because native video performs better in social-feed algorithms. The compounding effect of tiny loop improvements, not any single big bet, fuelled 80% organic growth.
“We didn't paywall any of the current functionality — you could come in and do everything you did before, in fact we upgraded the free functionality as well — and then we built new stuff and paywalled additional functionality.”
Don't paywall existing features — build new premium functionality on top of a free core
When Rapchat introduced subscriptions after years of being free, Seth Miller was careful not to degrade the existing experience for the 400K MAUs already on the platform. Instead, the free tier stayed intact and improved slightly, and the paid tier unlocked new features — vocal effects, algorithmic song enhancement. This approach protected the viral loop while converting engaged users who wanted the next level.
“Before it was like 'you're not making money, how are you going to make money, are you going to be a social network or a tools company?' — adding subscriptions meant we could take control of the pitch.”
Switching to subscriptions gives you investor narrative control
Before adding subscriptions, Rapchat sat in an ambiguous zone for investors: a social network without advertising, a music tool without a monetisation model. Introducing even early subscription revenue — a few months in, not fully rolled out — changed the investor conversation completely. Seth Miller could now declare the company type, defend the unit economics, and answer the monetisation question directly. Subscriptions resolved the identity problem that had made fundraising hard.
“They can come in and replicate the tool and have a feed but nah — we already have hundreds of thousands of passionate creators who have been riding with us, and you can't replicate that.”
A Facebook clone is a badge of honour — your community moat can't be replicated
When Facebook launched a near-identical rap recording and sharing feature (same colour scheme, same flame-emoji like button animation), Seth Miller laughed. The tool was commoditised almost instantly. What Facebook could not copy in an afternoon was years of community trust, shared culture, and the fact that engaged creators' output and social graph lived inside Rapchat. Community is the durable moat that survives product cloning.
“Working with a massive public company — they have a lot more process than you do, so literally getting a deal done is going to take longer and be more strenuous. We were fortunate enough for it to be a clean same-terms deal.”
Strategic investors add legitimacy but deals move slowly — push for clean venture terms
Sony Music's investment in Rapchat validated the thesis that major labels could partner rather than kill music-tech startups. But Seth Miller is candid about the cost: strategic investors from large public companies bring legal process, approval chains, and potential strings that pure financial VCs do not. His advice: if you pursue a strategic investor, push hard for clean standard venture terms — and defer complex partnership agreements until you have the bandwidth to execute them.
“When you're trying to get to a billion users you're going to be more like 'let me really nudge you to share' — you focus on the top of funnel. Subscriptions focus you more on the bottom of funnel and that was a really big unlock.”
Subscriptions reorient product thinking from top-of-funnel to bottom-of-funnel
Growing toward a MAU-maximising model pushed Rapchat to optimise sharing mechanics and viral coefficients above all else. Once subscriptions were introduced, the team's attention naturally shifted to activation, retention, and the quality of the creator experience — the features that actually drive willingness to pay. Seth Miller found this reorientation clarifying: with a revenue north star, every product decision had a clearer test.