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Marketplaces & Communities

Plugin / extension marketplace

Build a marketplace where developers list paid plugins/extensions for a popular platform (Shopify, WordPress, etc).

Catalog synthesis

The idea, in plain language

Build a marketplace where developers list paid plugins or extensions for a popular platform such as Shopify, Notion, WordPress, Claude/Codex, or another software ecosystem, and earn a share of the revenue. The videos cite concrete proof points: Erikas' five Shopify apps at $4.5M/year with roughly 90% margins and $0 marketing, Julien Nahum's NoteForms at $37K/month on the Notion marketplace, Ryan Doser's Claude Code Skill Stack clearing $3,000 in 30-45 days, AppSumo's $100M software-deal-distribution model, and Remy's single-GitHub-repo skills plugin that runs his life across Claude Code and Codex. Startup capital is essentially one weekend of building plus a marketplace account; the customer is a user of the host platform who needs a vertical feature. The videos frame this as a build-once, distribute-forever wedge, and several pitches, including Erikas, Remy, and Doser, explicitly call out no marketing spend.

Where the sources agree

  • Platform marketplaces such as Shopify, Notion, WordPress, Claude/Codex, and OpenAI's new App Store are the distribution rails; the videos pitch extensions of someone else's platform more than standalone SaaS.
  • One-weekend-build wedge is realistic — Ryan Doser's $3K in 30-45 days, Julien's $37K/month NoteForms, Danny Postma's $1M+ AI startups all start with one small plugin and iterate.
  • Marquee examples run near-90% margins — Erikas' Shopify apps, NoteForms, AppSumo's deal-distribution layer all cite low overhead and effectively no marketing spend.
  • Vertical niche beats generic: plugins aimed at a specific buyer, workflow, or template library are presented as stronger than a plugin for everyone.
  • Treat the plugin as the wedge into a bigger agency/SaaS — the videos repeatedly frame the plugin as lead-gen for consulting, custom work or a productised audit.

Where they differ

  • Koerner Office pitches this as a one-laptop side hustle (Claude skill stack, Rob Walling's 75-app-marketplaces stair-step, cabin-kits Shopify app), Greg Isenberg pitches it as an indie-hacker AI startup (Postma's $1M+ AI tools, Comfy UI template marketplace), MFM pitches it as a billion-dollar thesis (Richard Barton's information-wants-to-be-free / vertical transparency), and Starter Story pitches it as a founder-revenue case (NoteForms, Erikas' Shopify apps).
  • Distribution surface differs: Shopify, Notion, Claude/Codex, and similar marketplaces are gated and curated, while vertical transparency sites such as Zillow or Glassdoor analogues are open-web and SEO-led. The same plugin-marketplace label covers both shapes.
  • Monetisation shape differs — Notion/Shopify plugins are SaaS-priced subscriptions, Claude skills are sold as digital products, vertical-transparency sites layer lead-gen + affiliate on top.
  • Founder archetype differs: Doser, Remy, and Julien are solo builders; Postma and Pieter Levels-style pitches lean indie hacker; Richard Barton's transparency thesis is portfolio-scale. Same idea, three founder profiles.
  • MFM's 'information wants to be free' framing treats the marketplace as a billionaire thesis, while Koerner/Remy treat it as a $3K-in-a-month weekend project — venture vs side-hustle framing.

What each source says

KoernerThe Beginner-Friendly Claude AI Side Hustle Nobody Talks About

Ryan Doser on turning Claude skills — essentially SOPs for AI — into a digital product, with his Claude Code Skill Stack making over $3,000 in 30-45 days; domain knowledge in marketing, SEO or YouTube is the wedge.

Watch on YouTube
Starter StoryHow I Built It: $37K/Month Notion App

Julien Nahum left his 9-5 and built NoteForms — a Notion micro-SaaS — to $37K/month, covering idea validation, finding winning app ideas, fast development, marketing, viral growth, customer support, monetisation and AI in development.

Watch on YouTube
KoernerYou Only Need a Laptop to Start This Business

Chris and Michael Girdley riff on laptop-only businesses — an AI persona marketplace, a MasterClass-style 'talk to Steve Jobs' product, a local-journalism revival, an app that yells at distracted users and negotiating-as-a-service.

Watch on YouTube
IsenbergHow I Use Skills + AI Agents to Run My Life

Remy (AI with Remy) defines a 'skill' as a markdown SOP for an AI agent and shows his system for storing skills in a single GitHub repo, installing it as a plugin in Claude Code and Codex, and version-controlling the work.

Watch on YouTube
MFMHow He Turned His Side Hustle Into A $100M Business

Sam interviews Noah Kagan about starting AppSumo as a side hustle and turning it into a $100M business — software-deal distribution as the actionable model, with the rest being philosophy on cities, money and reading.

Watch on YouTube
indie-hackers#063 – Turning Small Ideas into a $35,000 a Month Business with Katie Keith of Barn2 Media

Katie Keith of Barn2 Media transitioned from WordPress client work to selling WordPress plugins that produce sustainable recurring revenue around $35,000/month.

Listen on Indie Hackers
Starter StoryMy Apps Make $4.5M/Year With $0 Marketing

Erikas runs five Shopify apps earning $4.5M/year with ~90% margins and effectively zero marketing — Shopify's app marketplace as under-the-radar distribution and his process for finding winning app ideas on platform queues.

Watch on YouTube
MFMHow To Create A Plugin That Will Make Millions In Revenue

Teaser on building a plugin (browser, SaaS, or platform) that prints millions in revenue — no chapters, just a focused 'plugin business' breakdown framed as a multi-million-dollar opportunity.

Watch on YouTube
Isenberg5 $1M+ AI startup ideas from an indie hacker legend

Danny Postma (Headshot Pro) on five $1M+ AI startup ideas — an AI keyword generator + content creator, Comfy UI template marketplace, AI-powered Fiverr/Upwork, niche AI tools and SaaS-app adjacencies.

Watch on YouTube
MFMThis Profitable Business Model Might Make You A Billionaire | My First Million Podcast

Richard Barton's billion-dollar businesses and the 'information wants to be free' thesis — markets that bring transparency to opaque industries (real estate, jobs, travel) scale to billion-dollar companies (Zillow, Glassdoor, Expedia).

Watch on YouTube
MFMHow To Build A Viral App & Make Millions From It (#379)

Brainstorming on hostile-takeover of 'Sara's List' plus Nikita Bier on how he built GAS — at the time the #1 app — and reverse-engineering the viral-app playbook.

Watch on YouTube
KoernerCan’t Code? The Best Way to Start Making Money Online

Rob Walling (Drip) on his stair-step method from freelancing to a big business, with guidance on when something is simple enough to vibe-code, when to use no-code tools and when to hire a developer — covers 75 app marketplaces.

Watch on YouTube
MFMHow to Make Millions With a Modern Day Infomercial | My First Million #221

Modern-day infomercial playbook — Guthy-Renker direct-response TV, trust-as-a-service businesses, content-business subscription models, professional certifications as a wedge and Shaan's first-five-investors list.

Watch on YouTube
KoernerHow This Entrepreneur Makes Over $10m per Year Selling Cabin Kits

Q&A round covering three calls — a private-school growth problem in Amarillo, a high-ticket DIY cabin-kit seller and a Shopify app that adds clippable coupons on product pages.

Watch on YouTube

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