How a solo founder built an “Operating System” for service businesses – Queue ($134k MRR)

Today’s story is about Queue, a fast-growing SaaS built by Masud Hossain (@masudrhossain), or just Mas as his friends call him. What started as a simple tool to help a friend review videos has turned into a platform used by over 1,500 businesses, making more than $134,000 per month.

Queue helps agencies and productized service businesses manage everything in one place, from client portals and payments to task tracking and feedback. It replaces four or five tools with just one, fully branded to match each business.

Mas built the first version solo, shared it with a few communities, and kept improving it based on feedback. Later, he joined Y Combinator, raised funding, and kept growing with a small team and a clear goal: make client work easier for service businesses.

Early Days: From a Side Project to a Real Business 📈

Queue didn’t begin as a startup idea. It started as a small tool that Mas built to help an esports coach. The coach needed to review gaming videos and give feedback to players. But the tools he was using like sending links and timestamps over Google Drive were slow and messy. So Mas built a simple video tool where people could click and comment directly on the video.

This first version was not meant to be a business. But soon, others started asking if they could use it too. Video editors wanted to give feedback to clients. Designers asked if it could work with images. Agencies wanted to use it for reviewing websites. Mas kept getting more and more of these requests. He realized he was onto something bigger.

Instead of rushing to raise money or build a full team, Mas took a smart and careful approach. He improved the tool little by little, listening to every piece of feedback. Eventually, it grew into something that was more than just a feedback tool. It became a full platform for service businesses to manage their work, clients, and paymentsall in one place.

Growth & Scaling: One Step at a Time 🏗️

As more people used Queue, Mas saw that most of them were agencies or freelancers who offered services like design, video editing, content creation, or consulting. These businesses often used 4 or 5 different tools to handle client messages, project tasks, invoices, and feedback. Mas saw a big opportunity: what if he could bring all of that into one simple platform?

He started adding features that made sense for these users. First, he added task forms so clients could easily request work. Then came billing, so agencies could charge for one-time projects or offer monthly subscriptions. Later, he built client portals, where customers could log in, see their projects, and leave feedback. Mas also made sure users could white-label Queue and use it with their own logo, branding, and domain.

Mas kept the pricing simple: it started as low as $9/month, and over time, new users began paying $49/month and up. Early users were rewarded with “grandfathered” pricing. The product kept growing fast because users really needed it—and they were happy to pay for it.

In 2020, Queue was accepted into Y Combinator, one of the most famous startup programs in the world. That gave Mas more visibility and support, but he stayed focused on building slowly and profitably. By early 2024, Queue was making more than $134K/month, all with a lean team and no outside funding.