The Indie Builder Economy on Substack: Creators Becoming Product Companies
The Most Comprehensive Analysis of Products Built Within the Substack Ecosystem
Substack economy coverage usually centers on subscriptions, paywalls, and affiliate revenue - the âclassic trioâ of newsletter monetization.
Hereâs whatâs overlooked: the growing market of products built on or for Substack.
Today, Iâm flipping the script.
Letâs talk about how Substack fuels the indie builder economy.
Table of Contents:
What âIndie Builderâ Means
Builder Communities on Substack
What People Are Building
Where People Are Selling
How and How Much People Actually Earn
Why Building on Substack Works
The Product Hunt Problem
The Strategic Gap Or Strategic Decision
Hey, Iâm Karo đ¤
AI product manager and creator of StackShelf.app. Product is my lane: I work in it, write about it, and build it.
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What âIndie Builderâ Means
An indie builder is a creator who designs, develops, and launches products independently. No company backing. No investors breathing down our neck.
We move fast. Usually solo or with a tiny crew.
We handle everything: the landing page, the product, the support inbox, and yes, the screenshot of the first sale.
We prefer autonomy over bureaucracy, knowing that the risk is personal.
Every shipped product has our fingerprints on it.
Builder Communities on Substack
Substack now hosts thriving communities of builders. People come here to gain concrete tools, learn with others, and trade product launch support.
A few builder communities worth checking out:
Product with Attitude by yours truly đ¤
As of October 2025, these four communities reach 36,389 followers on Substack alone.
Builders congregate where other builders are.
And builders launch products.
What People Are Building
Tech Products & Developer Workarounds
The pace here is wild.
Calling this area âboomingâ barely covers it. Whatâs really happening is an avalanche of Substack-adjacent products:
built Writestack.io, an AI-powered productivity platform for scheduling and analyzing Substack Notes from one dashboard.
built multiple tools:
Substack Control Center, a unified analytics hub for your publication
Substack Pro Studio, a comprehensive notes management & growth system
Substack Scheduled Notes, a Chrome extension
a one-click tool for grabbing your newsletter stats instantly
and are about to launch an AI Co-Pilot for Newsletter Creators, a tool for growing your subscriber base with compelling writing and sharp, personalized content strategy.
created so many useful automations, it made sense to build a dedicated platform to house them.
built StackDigest.io, turning overflowing inboxes into organized, themed reading digests.
ships products on what feels like a weekly basis:
built a tool for turning your Substack post into viral notes
built several Chrome extensions including a Substack bulk messaging tool
Most of these are already featured on StackShelf, a marketplace for Substack-built products, from books and digital templates to AI-powered platforms.
Digital Products
Building in public doesnât always mean coding sophisticated integrations. Some of the most successful Substack creators are building careers with simpler products: templates, courses, guides, and systems.
Take as an example:
In August 2023 I made my first sale for $4.90 on Gumroad.
It wasnât life-changing money, but it proved one thing: If I could make $1, I could make $100, and if I could make $100, I could make $1,000.
He was right.
is now perhaps the most visible example of the digital product economy, consistently earning through courses and guides, such as the Solopreneur Success OS. Gumroad sales alerts are flooding his screen every day.is another example - heâs sold thousands of digital products and grown a social audience of over 100,000.
recommends:
My personal advice would go down the digital product route and donât go down the paid subscriber route.
Directories
Curated directories act as expert-made maps for navigating crowded or fragmented spaces. They make it easier to find relevant people, products, or resources by organizing them in one accessible place.
Examples include:
Sidestack.io: a directory of newsletters and writers, with features like search by publication language.
Vibecoding.builders: âs directory features people building with AI
SheWritesAI: run by , this directory features AI writers with expertise in ethics, business, and creative AI
Substack Bookstore: run by and , this directory features indie authors.
Courses & Workshops
leads workshops to help writers perfect their niche and positioning.
runs free workshops for people in transition.
offers live training sessions on building digital courses.
runs coaching sessions focused on creating irresistible offers.
Learning Platforms
has just launched a learning platform, Cozora.
Services & Consultations
Where Builders Are Selling
Creators in 2025 have access to an exhaustive exhausting ecosystem of monetization platforms.
This fragmentation is a real discovery headache. None of us is waking up thinking: What I really need today is another place to upload my products!
We donât need one more platform. We need one cozy place that respects where our products live and brings them closer to where our community hangs out.
That was part of the idea behind StackShelf. Create one place that pulls all these products together, closer to Substack itself, without asking creators to uproot anything. The products stay where they are. StackShelf simply connects the dots.
How And How Much Builders Actually Earn
There are many ways to monetize products tied to your Substack publication:
Subscriptions
In June 2025, Substack CEO shared that more than 50 authors are now earning over $1 million annually through paid subscriptions alone.
The math checks out: with just 100 paying readers at the $5/month minimum, thatâs $6,000 annually. Scale that to thousands of subscribers, and the earning potential compounds quickly.
Affiliate Partnerships & Sponsored Posts
Some writers earn a big chunk of their revenue through affiliate partnerships:
Indie Products
Subscriptions and affiliate links are the more traditional ways of monetizing newsletters. Theyâre outside the builder economy. They donât include any revenue from products built on or for Substack.
Luckily, earnings transparency is a consistent pattern among successful builders, veterans and newcomers alike.
Transparency isnât a flex here. Itâs a service to the community. Some builders, like , and publish monthly earnings reports for their premium members.
: over $2,000 in a single weekend from a simple digital product
: $16,000 ARR from subscriptions to Writestack
Why Building on Substack Works
Building in Public = Solving Problems for the Community
Iâve mentioned it in my previous posts - Substack is a criminally underrated market research tool. Itâs a hands-on methodology for solving real problems alongside your community.
Substack-native tools let you gather structured feedback directly from subscribers. Not just anonymous internet lurkers. (How powerful is that!)
Notes where you can ask questions
Reader polls within your posts
Reader polls within your welcome emails
Subscriber Chat supercharges this process. It morphs casual conversation into deeper discussions and growth levers.
The skills weâre all born with (observation and curiosity) shine brightest when Substack time goes to listening, testing, and iterating.
Not just self-promotion.
Building in Public = Testing With Real Users
If youâre in product, this is the jackpot.
No matter which product methodology youâre religious about, they all agree on one thing: nothing has more value than feedback from real people.
When readers already understand your goals and can DM you with questions, testing is quicker, pricing is clearer, and launches feel like conversations, not campaigns.
StackShelf didnât break the internet, but it did break my sleep schedule.
Through every crunch and every feature test, people showed up.
Letâs pause on that.
People Iâve never met face-to-face (yet!) have taken time out of their busy lives to help move this project forward. Thatâs uplifting, and makes me want to pay it forward.
So I do.
đ If you ever need help rounding up testers, Iâm here. Just ask!
Testing in public is common on Substack. found 97 testers in no time. For , a single note sparked interest from multiple beta users. gets input from our community chat even during ideation.
Building in Public = Helping Comes First
Letâs talk about freebies.
Freebies get called lead magnets all the time.
But for so many builders, including me, they serve another purpose too - helping others.
I see it every day, all around Substack:
: Thereâs no better joy than knowing what I create is helpful
: These products arenât just tools, theyâre the manifestation of my passion for helping others navigate the solopreneurship landscape.
is self-funding StackDigest despite high hosting costs and generously sharing valuable insights with us for as long as possible.
âs directory has been free for as long as Iâve known her.
Iâve offered free access to StackShelf several times, fully aware Iâd be covering the cost out of my own savings.
All of us come from the same place: Learning + Helping > Hustling for Earnings
Those whoâve visited StackShelf already know: giving is the culture. Freebies are default.
People routinely give away what took them months to figure out: their systems, their thinking, their craft.
And helping others doesnât end with freebies.
âs guiding question stays the same for free and paid products:
How can I help people solve real problems where they get a tangible ROI thatâs more than they paid me?
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The Product Hunt Problem
After digging through builder behavior, Iâm convinced Substack has the potential to