Open Source vs Proprietary: Making the Right Choice

Introduction

When building custom software, one of the first decisions is which technologies to use. Should you build on open source tools like PostgreSQL and Next.js, or invest in proprietary platforms like Oracle and Salesforce? The answer is rarely black and white.

At MG Software, we are strong advocates of open source, but we also recognize that proprietary solutions have their place. Here is a clear-eyed comparison to help you make the right choice for your situation.

The True Cost Comparison

Open source software has no licensing fees, but it is not free. You still need expertise to deploy, configure, maintain, and secure it. However, those costs are typically a fraction of proprietary licensing, especially as you scale. Adding 100 new users to PostgreSQL costs nothing. Adding them to Oracle could cost thousands.

Proprietary software often comes with support contracts and guaranteed SLAs, which reduce risk. But those contracts come with annual price increases, and switching costs grow every year you stay. Consider the total cost over five years, not just the first year.

Flexibility and Vendor Lock-In

Open source gives you the source code. If the project stops being maintained, you can fork it, hire someone to maintain it, or migrate at your own pace. You own your destiny. With proprietary software, you are dependent on the vendor continuing to support the product.

Vendor lock-in is the hidden tax of proprietary software. We have seen clients trapped in expensive contracts because their data is stored in a format only the vendor can read. Open standards and open source eliminate this risk entirely.

Security Considerations

A common misconception is that proprietary software is more secure because the code is hidden. In reality, security through obscurity is widely considered a weak strategy. Open source software benefits from thousands of eyes reviewing the code.

Major open source projects like Linux, PostgreSQL, and Next.js have dedicated security teams and rapid vulnerability response. That said, smaller open source projects may lack resources for security audits, so evaluate each dependency individually with security scanning tools.

When Proprietary Makes Sense

Proprietary solutions can be the right choice when your team lacks specialized expertise and needs vendor support, when regulatory requirements mandate specific certifications that only certain vendors provide, or when a proprietary tool solves a very specific problem better than any open source alternative.

The key is making a deliberate choice rather than a default one. Many businesses use proprietary software simply because someone sold it to them, not because they evaluated the alternatives. We help clients make informed technology decisions based on their actual needs.

Watch the License, Not Just the Price Tag

Recent years have added a nuance to the open source story: licenses can change. Several well-known projects moved from permissive licenses to restrictive ones, leaving companies that built on them with a choice between paying up or migrating. The lesson is not to avoid open source, but to check the license and the governance behind a project before making it a load-bearing part of your stack. Projects stewarded by foundations, like PostgreSQL or the Linux kernel, are far less likely to pull this move than projects owned by a single venture-funded company.

Our rule of thumb: for databases, frameworks, and infrastructure, prefer projects with multiple corporate backers and a long track record. For smaller libraries, check when the last release was and how issues are handled. Ten minutes of diligence prevents a costly forced migration three years later.

Escaping Lock-In Is a Project, Not a Panic

If you are currently locked into a proprietary platform that is getting more expensive every renewal, the way out is rarely a dramatic overnight switch. The proven route is gradual: put your data in an open format first, rebuild the most business-critical workflows on an open stack, and let the legacy contract expire when the replacement has proven itself in production.

We regularly guide this transition as part of software redevelopment projects, and in 2026 the economics are better than ever, because AI-assisted development has significantly cut the cost of rebuilding. What matters most is starting the analysis before the next contract renewal, not after. A short conversation is usually enough to map whether an exit route is realistic for your situation.

Conclusion

Our recommendation is to default to open source and choose proprietary only when there is a clear, specific reason. This approach minimizes long-term costs, maximizes flexibility, and keeps you in control of your technology stack. Let us help you evaluate the right mix for your business.