Build it and they'll come.
That line has killed more indie apps than bad code ever did.
You ship the product, you tweet the link, and then... nothing. Building was the easy part. Getting users is 10x harder. I learned that the expensive way, and every founder I interview on the podcast says some version of the same thing.
Which is why this Starter Story Build video stopped me mid-scroll. It breaks down three apps that market themselves: real plugin businesses pulling $23K to $29K a month with zero marketing budget. They did it by building on top of platforms where the customers already are, not by going viral or burning cash on ads.
Watch it first, then let's pull the playbook apart.
Why the Marketplace Is the Marketing
Every one of these three businesses skipped the part that kills most founders: the cold start.
They had no audience and no ad budget, and none of them needed one.
Instead, they built a plugin for a platform that already had hundreds of thousands (sometimes millions) of users, then let the platform's own app store surface them to buyers searching for exactly what they built.
Someone types "API" into the Airtable marketplace, your plugin shows up, they install it, you get paid. The search box does the selling.
→ The platform is the distribution. The marketplace listing is the funnel.
I talk about distribution in almost every episode I record, and the pattern from founders who actually get to $20K+ MRR is boringly consistent: they picked a channel where buyers were already searching, then went deep on that one channel. Marketplace plugins are the purest version of that. The channel is baked into the product decision itself. You choose your distribution the day you choose your platform, before you write a line of code.
That's the whole trick. Now the three businesses.
1. Data Fetcher: $23K a Month From One Airtable Plugin
Data Fetcher lets you connect any API to Airtable without code. Need OpenAI or Notion data inside your base? That's the job it does.
The numbers, straight from the Starter Story case study:
- $23,000/month, about $270,000 a year
- One founder (Andy), zero employees
- Around $100 to start
And the platform math is what makes it work. Airtable serves over 450,000 companies, including Fortune 100s with real software budgets. Andy didn't need to find those companies. They find him.
The video actually does the search live: type "API" into the Airtable marketplace and Data Fetcher sits near the top of the results. That's the entire acquisition funnel. A company hits a wall inside Airtable, searches the marketplace for a fix, installs the top result, becomes a paying customer. No landing page A/B tests, no SDR sequences, no content treadmill. The buyer arrives pre-qualified because they searched for the exact problem the plugin solves.
One detail from the case study matters more than the revenue: timing. Andy launched when Airtable had just opened its marketplace to third-party developers. Early listings in a fresh marketplace face almost no competition, and they compound position from there.
The takeaway isn't "go build on Airtable." That window is more crowded now. The move is to find the platform that just opened its doors. The video names a few: GoHighLevel opened its marketplace around 2023, Framer in 2024, monday.com back in 2020. Excel and OpenAI both got name-dropped as giant platforms still underexploited.
2. Superlemon: $29K a Month Sitting Between Shopify and WhatsApp
Superlemon was a WhatsApp plugin for Shopify stores: cart recovery, order updates, support chat, all over WhatsApp.
Built in 30 days. $0 to start. Peaked at $29,000/month.
Look at the two platforms it straddled. Shopify has 4.82 million active stores. WhatsApp has 2.95 billion monthly users. When your app is the bridge between two platforms that size, the overlap alone is a market. Millions of store owners whose customers already live on WhatsApp.
The founders sold Superlemon, then did the smartest thing in the whole video: they stayed in the exact same niche and built DelightChat, another WhatsApp commerce tool, now at roughly $30K MRR. Same customer, same problem, second exit-sized business. Depth beats novelty.
There's a warning label on this one too, and it's honest of the video to show it. After the sale, the new owners let ratings slip, and Shopify eventually removed Superlemon from the app store. The business that "marketed itself" could also be unlisted overnight.
→ Marketplaces giveth, marketplaces taketh away. Follow the platform's rules like your revenue depends on it, because it does.
One more lesson from the Superlemon story: reviews are the ranking algorithm. DelightChat's listing shows 169 ratings, almost all five stars. On a marketplace, reviews are the SEO. Shopify surfaces the best-reviewed apps first, so every happy customer ranks you higher for the next one.
3. Groundhogg: $25K a Month Fighting the "Success Tax" on WordPress
Groundhogg is a CRM and marketing automation plugin for WordPress, started by a 21-year-old who hit $300K ARR within two years. It now does about $25,000 a month.
WordPress powers 43 to 44% of all websites. That's roughly 472 million sites. Biggest platform in the entire video, bigger than Shopify by two orders of magnitude.
But CRMs are a dime a dozen, so why does this one win? Pricing.
Groundhogg charges $50 a month flat, no matter how many contacts you have. HubSpot and friends charge you more as you grow. Groundhogg's landing page calls that the "success tax," and the positioning writes itself: get more successful, pay more money? Screw that.
If you're the founder drowning in tools like these, the fix usually isn't another plugin, it's wiring the stack together properly. This breakdown of business automations covers that side well.
Here's the twist though: WordPress has a plugin directory but no real app store optimization game. No review-driven algorithm to ride. So Groundhogg grew the old-fashioned way, and it's a playbook I keep hearing on my own show:
- WordPress-focused podcasts (agency owners listen, then recommend Groundhogg to every client)
- Industry Facebook groups, forums, Reddit, the places WordPress people actually hang out
I've watched this exact motion work from the other side of the mic. Going on niche podcasts is still one of the most underpriced distribution channels for SaaS. (I built an entire podcast on that belief.) The mechanics are simple: one agency owner hears you on a show, they run 30 client sites, and you just closed 30 installs with a single conversation. That's why a plugin with no app store algorithm behind it can still compound.
The Playbook, Compressed
Strip the three stories down and you get five moves:
- Pick a platform with buyers, not just users. Airtable's 450K companies include Fortune 100s that already pay for tools.
- Favor marketplaces that opened recently. Data Fetcher's edge was being early to a brand-new marketplace, and GoHighLevel and Framer are the current versions of that window.
- Build the bridge between two big platforms. Superlemon existed because Shopify and WhatsApp didn't talk to each other.
- Win on reviews. On a marketplace, a five-star average is your ad budget, so obsess over the first 50 ratings.
- Position against the incumbent's pricing. Groundhogg didn't out-feature HubSpot, it out-priced the success tax.
And yes, platform risk is real. Shopify can delist you, Airtable can build your feature natively, and the video is upfront about both. My take: it's still a better trade than the cold start, because you can take the cash flow and diversify later, like the Superlemon guys did.
If you want more ideas in this lane, I've covered adjacent plays before: simple apps that make money and how to grow an app with no audience.
FAQ
What are apps that market themselves?
Apps built on top of large platforms (Airtable, Shopify, WordPress, Framer) and distributed through that platform's own marketplace. Customers find them by searching the marketplace, so the founder needs no ad spend or audience. Data Fetcher ($23K/month) and Superlemon ($29K/month) are working examples.
How much does it cost to start a plugin business?
Less than you'd think. Data Fetcher started with around $100, Superlemon with $0 and 30 days of building. Your real costs are platform developer fees and your time. With AI coding tools, the build phase has collapsed to weeks.
Which platform should I build on in 2026?
Look for large platforms whose marketplaces opened recently, because early listings face the least competition. The video flags GoHighLevel (opened around 2023) and Framer (2024) as current windows, plus evergreen giants like Excel and OpenAI where plugin ecosystems are still forming.
What is platform risk?
The platform controls your distribution, so it can remove your app or ship your feature natively, killing your business overnight. It happened to Superlemon after its sale, when Shopify delisted it. You manage the risk by following platform rules strictly, keeping ratings high, and diversifying once the cash flow allows it.
Steal More Playbooks Like This
Every week on the Profitable Founder Podcast I sit down with bootstrapped founders doing $100K to $10M a year and pull apart exactly how they got distribution. No fluff, just the numbers and the moves.
