5 Niche Micro-SaaS Businesses Quietly Earning $10K/Month (and What You Can Learn From Them)

There’s a peculiar charm about micro-SaaS startups—quiet, niche-focused businesses solving small yet very real problems. No complicated venture funding, no noisy PR campaigns—just solid, steady profits and satisfied customers.

As someone who spends hours exploring the quirky corners of SaaS, I'm always fascinated by entrepreneurs who identify tiny, overlooked problems and build surprisingly profitable solutions around them.

Today, I’m shining a light on five micro-SaaS startups quietly winning big. Each of these earns around $10K per month (or more), proving you don’t need massive scale to succeed. And more importantly, I’ll share what we indie hackers can learn from them.

1. Bannerbear – Simple Automated Image Generation

What They Do:
Bannerbear helps automate repetitive design tasks like generating social media banners, dynamic images, or marketing visuals via API.

Why it Works:
It solves a hyper-specific, recurring pain point: marketers and designers lose hours each week to repetitive tasks. Bannerbear streamlines the entire process.

Lesson for Indie Hackers:
Look for boring, repetitive tasks in niche communities—then automate. Even “small” problems can lead to massive time savings and a surprisingly large market.

2. Closet Tools – Automating Reselling on Poshmark

What They Do:
Closet Tools automates tedious actions like sharing listings and following users on Poshmark—boosting reseller visibility and sales.

Why it Works:
Resellers see direct revenue boosts from using it, making the subscription cost a no-brainer.

Lesson for Indie Hackers:
Find a large, active marketplace (like Etsy, Airbnb, Shopify, or here, Poshmark) and build tools that help power users succeed faster and easier.

3. Potion – Turn Notion Pages Into Websites

What They Do:
Potion turns Notion pages into live websites, allowing creators to leverage their content instantly.

Why it Works:
It builds on Notion’s ecosystem without competing with it. Potion fills the gap between note-taking and public sharing—without users leaving the Notion interface.

Lesson for Indie Hackers:
Rather than build something entirely new, extend popular platforms. If a tool has a loyal fan base, they likely want even more flexibility—offer it.

4. PDFShift – Simple HTML-to-PDF API

What They Do:
PDFShift offers an API to convert HTML into clean, downloadable PDF files—great for devs generating reports, invoices, or receipts.

Why it Works:
It handles a frustrating technical job and wraps it in an easy API, saving hours of dev time.

Lesson for Indie Hackers:
APIs that solve annoying technical problems can become quiet revenue machines. Developers are happy to pay for tools that save them time and mental effort.

5. Carrd.co Plugins – Tools and Templates for Carrd Users

What They Do:
Founders are quietly earning $10K+ per month selling plugins, templates, and widgets to Carrd users.

Why it Works:
Carrd’s simple website builder has an engaged community—and many users want more functionality without switching platforms.

Lesson for Indie Hackers:
When a tool gains quiet momentum, add value with templates, components, or plug-ins. You don’t need to build the platform—just extend it in meaningful ways.

What Can Indie Hackers Learn From These?

1. Small is Powerful

Micro-SaaS isn't about volume—it's about solving one problem really well for a specific group. These five startups prove you can build sustainable income by focusing on the small stuff.

2. Simplicity Wins

Each product solves one clear, niche pain point. You don’t need dozens of features. You just need one that truly matters.

3. Go Where People Already Pay

Instead of convincing people to care, go to platforms or communities where users are already frustrated and spending money. Your tool just needs to remove friction.

Thinking of Building One?

You don’t need to code everything from scratch or hire a big dev team. With no-code platforms like Fuzen.io, you can launch MVPs, internal tools, or even full SaaS apps fast—without writing a line of code.

If you’re dreaming of a niche micro-SaaS but don’t know where to start, Fuzen can help you validate and launch quickly, with minimal overhead.

Your Turn: What's Your Micro-Niche Idea?

These stories prove that micro-SaaS isn’t just viable—it’s thriving.

Got a niche you're thinking about? Already building something quiet but powerful? I’d love to hear what you're working on. Share your insights and let’s swap ideas in the comments!