Billing And Invoice App Business

3 Billing And Invoice App Business Success Stories [2025]

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Updated: April 17th, 2025

Tired of managing messy invoices and billing errors? A billing and invoice app could be your next business venture. This app simplifies the invoicing process by automating the creation, sending, and tracking of invoices. Tailored for small business owners and freelancers, it ensures you're paid accurately and on time without the hassle of manual entry.

Developing this app involves market research, design, and coding, followed by testing and refinement to ensure it meets users' needs. Once launched, continuous updates and customer support will keep your clients satisfied and your business thriving.

In an era where time is money, such an app will save countless hours and reduce stress for business owners. If you’re tech-savvy and have an eye for detail, starting a billing and invoice app business could be the rewarding challenge you're looking for.

In this list, you'll find real-world billing and invoice app business success stories and very profitable examples of starting a billing and invoice app business that makes money.

1. Promys ($4.5M/year)

In starting their business, the founder realized the need for a workflow system to offset the complexity of a growing company. Unable to find a suitable solution in the market, they had their development team build the first version and eventually spun it out as a focused business. Throughout the process, they emphasized the importance of getting an early version of the product to customers to gather feedback and make necessary adjustments.

How much money it makes: $4.5M/year

Our CRM Suite Just Hit $3M ARR

This case study follows a serial entrepreneur's journey in the Information Technology industry, where he founded successful companies such as UNIS LUMIN and Promys, and offers advice to aspiring founders, emphasizing the importance of adjusting to changing markets and learning from early customers' input.

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2. Splynx ($3M/year)

to improve our conversion rates and generate more leads. Additionally, we focus on providing excellent customer support and building long-term relationships with our clients. Our customer retention rate is high, and we continuously listen to feedback and make updates to our product to better meet our customers' needs.

How much money it makes: $3M/year
How many people on the team: 50

How We Built A SaaS Solution And Grew It To $3M ARR

Splynx, a SAAS solution for internet and voice providers with software features such as billing, payment collections, integration with accounting platforms, and network management, has achieved an ARR of around 3 million USD and 50% annual growth with 750 companies in 50 different countries as clients, and is hoping to expand further into the US and Canadian markets.

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3. HoursLogger ($10.2K/year)

Drew Haines, the founder of HoursLogger, came up with the idea for his time tracking and invoicing app while working as a software and accounting consultant with his brother. Frustrated with the complexity and lack of user-friendly options in existing solutions, they decided to build their own app that would be simple and intuitive, catering to small business owners like themselves. Through consistent iteration and soft launches, they gained traction and eventually integrated with QuickBooks, resulting in a significant increase in signups.

How much money it makes: $10.2K/year
How much did it cost to start: $1K
How many people on the team: 0

How These Two Brothers Built A Time Tracking And Invoicing App

HoursLogger, a time tracking and invoicing app, was founded by two brothers who started the business as a side project over 6 years ago and made around $9k in passive income last year, with the app in a great position to grow.

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