The Founder's Perspective: Why Vertical SaaS?
Or: Why we stopped trying to build software for everyone, and built Lensiro just for optical shops.
If you've ever walked into an optical shop in Indonesia to buy a pair of glasses, you probably didn't think much about the software running on the computer behind the counter. But as an engineer and founder, I couldn't help but look.
What I saw was a nightmare of generic Point of Sale (POS) systems trying—and failing—to handle the incredibly specific workflows of optical retail. The system would say there were 5 frames in stock, but a customer with a specific prescription would need a lens that had to be custom-ordered, sent to a lab for faset (cutting and edging), and tracked through a multi-day quality control process.
A generic POS simply cannot handle that. It just sees "Item A" and "Item B". It doesn't understand that Item A (the frame) and Item B (the lens) need to be married together in a lab before the customer can pick them up.
But the problem isn't just on the business side. The customer experience (CX) of buying glasses hasn't fundamentally improved in decades. You walk in, stare at hundreds of frames on a wall, try on a few that probably don't fit your face shape or nose bridge, get your eyes checked, and then wait days with zero transparency on when your glasses will actually be ready.
This was the "aha" moment that led us to build Lensiro . We realized that to truly revolutionize the optical industry, we couldn't just fix the backend business operations—we had to completely reinvent the customer experience. And to do that, we needed Vertical SaaS.
The Problem with Horizontal SaaS
Horizontal SaaS—software built to serve a wide variety of industries—is great for general problems. Think of Slack for communication or generic CRM tools. But when it comes to the core operational workflows and customer touchpoints of a specific industry, horizontal software often falls short.
It's the classic "jack of all trades, master of none" problem. To appeal to a restaurant, a clothing store, and a pharmacy, a horizontal POS has to stay generic.
In the optical industry, a generic POS leads to:
Inventory Chaos: Optical shops don't just sell items; they sell combinations of frames, lenses with specific prescriptions (spherical, cylinder, axis), and contact lenses.
Broken Workflows: There is no built-in way to track the Faset & QC process, meaning customers are left in the dark about their order status.
Stagnant Customer Experience: There is no personalized styling, no seamless after-service follow-ups, and no modern digital touchpoints for the buyer.
The Vertical SaaS Advantage
Vertical SaaS, on the other hand, is software built for a specific niche. And right now, it is dominating.
Recent market data shows that the global vertical software market is projected to reach USD 282.98 billion by 2031, growing at a CAGR of over 11% . Why? Because 87% of vertical SaaS users report that their provider truly understands their industry's needs, compared to just 62% for horizontal solutions .
When we decided to build Lensiro, we didn't want to build just another POS. We wanted to build the operating system for optical retail in Indonesia, with a dual mandate: bulletproof business operations and a revolutionary customer experience.
Here is why this specialist approach works:
Revolutionizing the Customer Experience (CX)
Because we only focus on optical retail, we can build customer-facing features that a generic POS company would never touch.
Our ultimate objective with Lensiro isn't just to make shop owners' lives easier; it's to make buying glasses feel like magic. That's why we are building Lensiro Fit—an AI-powered eyewear fitting system that uses MediaPipe and Gemini AI to analyze a customer's face shape, measure their nose bridge, and recommend the perfect frames based on a custom sizing and styling algorithm. (I'll be writing a deep-dive article specifically on Lensiro Fit soon!)
We also integrated the WhatsApp Business API so customers receive automated, branded invoices and real-time updates when their glasses move from the lab to "ready for pickup." We are turning a historically blind, analog process into a modern, transparent digital experience.
High Switching Costs and Deep Integration
When you embed your software deeply into an industry's mission-critical workflows, you become indispensable. Lensiro handles everything from the initial DP (down payment), to the lab tracking, to the final customer WhatsApp notification.
When a system handles your double-entry bookkeeping, your multi-branch stock mutasi, and your customer OTPs, replacing it becomes unthinkable. This is why top vertical SaaS platforms frequently achieve Net Revenue Retention (NRR) rates of over 120% .
Solving the Unsexy Problems
The best vertical SaaS companies solve the unsexy, deeply frustrating problems that horizontal players ignore. For us, that was the stock system. We built an event-sourced ledger architecture so that our stock counts cannot be wrong. (I wrote a whole deep-dive on that here).
We also tackled the complexities of multi-branch management. Many optical chains in Indonesia have 5, 10, or 50+ branches. Managing roles, access, and real-time stock opname across that many locations requires a specialized architecture, not a generic "location" tag.
The Future is Specialized
As AI continues to commoditize basic software functions, the true moat for SaaS companies will be deep, specialized domain knowledge and proprietary workflows that touch both the business backend and the end-consumer experience.
The horizontal player is like a general practitioner doctor—good for a basic checkup. But the vertical player is the specialized surgeon. And in software, just like in medicine, specialists deliver better outcomes.
Building Lensiro has taught me that you don't need to build software for everyone to build a massive, impactful business. You just need to build the perfect software for someone, and completely change how their customers experience the world.
About Lensiro
Lensiro is a complete retail management platform built specifically for optical stores. It handles everything an eyewear business needs in one place — from inventory and stock management across multiple branches, to point-of-sale, purchasing, member management, and accounting with double-entry bookkeeping. If you run an optical retail business and want a system that actually gets inventory right, check it out at lensiro.com.
