Suppose you're sitting in a board meeting, and someone suggests, "Why build custom software when we can just subscribe to a SaaS platform?" It's a fair question.
SaaS vs. Custom Software Global Market Share
Let me start with some eye-opening facts: SaaS and custom software are the two main ways to implement business technology. SaaS solutions account for about 70% of new business software setups, while custom development holds around 30% (as of late 2023). In Europe, the numbers are similar at 75% and 25% respectively. The SaaS market offers about 25,000 different software solutions to businesses, making it the largest category of business software today. On the other hand, organizations choosing custom development can pick from about 4,500 development firms and many freelance developers worldwide.
However, while SaaS is more common, custom solutions lead when it comes to strategic value for specialized work. Data from the research firm Gartner shows that businesses using custom solutions report an average ROI of 55% over five years, while SaaS setups average 42% over the same period.
Why is SaaS More Popular Globally While Custom Software Dominates Specialized Industries?
By the middle of 2024, SaaS platforms overtook traditional on-premises software for the first time. SaaS now has more than a 70% market share in business software. There has already been a strong trend of users moving from old systems to SaaS in the last four years. SaaS offers many applications at different price points, making it easy for businesses everywhere to access.
This "plug-and-play" style provides immediate tools with lower starting costs. However, certain industries still prefer custom-built software for several reasons:
● Regulations: Highly controlled industries like healthcare and finance have specific rules that standard software cannot always follow.
● Unique Models: Businesses with very unique ways of working find that custom development gives them a better competitive edge and protects their original ideas.
● Budget: Large companies are usually less worried about high costs compared to small businesses.
● Asset Value: Custom software is seen as a valuable asset on the company’s balance sheet, making it a better choice for businesses focused on long-term value.
Ultimately, custom software gets the highest satisfaction ratings in specialized industries, beating SaaS and old systems by a small margin according to a 2022 Deloitte survey.
Security Perceptions and Feature Adoption
Artificial Intelligence (AI) Features in Modern Software
AI has become a huge part of modern software, making it easier to use. AI use among developers has jumped to 90% in 2025. Both SaaS and custom software are now adding AI in different ways.
SaaS Focus Accessibility and Standardization:
SaaS providers focus on making AI easy for everyone. These features are built to work in the cloud using data from many different clients. Common SaaS AI features include:
● Virtual Assistants: Helping users do routine tasks faster.
● Predictive Analytics: Analyzing data to predict future trends.
● Automated Workflows: Helping to finish tasks automatically to save time.
Custom Software Focus: Unique Processes
Custom development uses AI to solve specific business problems. This allows for:
● Deep Integration: AI can work directly with the company’s private processes.
● Specialized Models: Teams can build AI models trained only on that specific company’s data.
● Better Advantage: Unique AI tools can give a company a big lead over competitors.
The Real Question: When to Choose Custom and When to Choose SaaS?
After looking at data from thousands of companies, here is a simple guide:
Choose SaaS when:
● You need standard functions (HR, email, basic CRM). ● You need to start very quickly.
● Your starting budget is small.
● You are okay with changing your work style to fit the software.
Choose Custom Development when:
● Your success depends on a unique way of working.
● You are in a highly regulated industry (like medicine or law).
● You need the software to fit perfectly with your current systems.
● Long-term control is more important than a quick start.
● Your data security needs are very high.
Large companies like IBM report that 64% of businesses regret choosing SaaS because it isn't flexible enough. At the same time, 58% of custom projects go over budget because of bad planning. The lesson is to choose based on what your business actually needs, not just what is trendy.
The Hybrid Future
The smartest companies don't just pick one; they use both. They use SaaS for basic things and spend money on custom development for the parts of the business that make them special. The global SaaS market is expected to reach $282 billion by the end of 2025, but the custom software market is also growing. These two can work together. As one report says, companies using custom solutions improved their efficiency by 35% over those using only generic tools.
At Prognos Labs, we built our recent Patient Intake System using a hybrid model. It is 50% pre-built, and the rest is customized to fit the current system. This resulted in a smooth setup that follows all the necessary rules.