Every piece of software your company runs sits on a decision someone made (or didn’t make) about how that software is built, licensed and maintained. Open source or proprietary. Community or vendor. Full access to the code or a subscription and a support ticket.
The choice shapes everything downstream: what you can customise, what you’ll pay over five years, who fixes things and how much control you have over the technology your business depends on.
And yet, often this choice is made by default rather than by design.
Someone picks a tool, it works, it stays and five years later you’re building your entire operation around a decision nobody remembers making.
It matters more now than it used to. 96% of commercial codebases contain open-source components, and the open source software market is growing at roughly 17% per year.
Meanwhile, proprietary software isn’t going anywhere either. SaaS revenue keeps climbing. Companies like Salesforce, Adobe and Microsoft continue to build entire ecosystems around licensed products.
So which model is better? It depends on what you’re building, who’s building it and what trade-offs you can live with. Anyone who gives you a blanket answer is selling one of the two.
The open source vs proprietary debate has the same energy as Michael Jackson vs Prince. Both brilliant, both changed the game, both have die-hard fans who’ll argue until sunrise (though we all know who sold more records).
This guide walks through both sides. What each model offers, where each one falls short and how to make a decision that fits your situation rather than someone else’s blog post.
What Is Open Source Software?
Open source software is software whose source code is publicly available. Anyone can view it, modify it, distribute it and build on top of it under the terms of an open-source licence.
The development model is collaborative by design.
A community of developers like independent contributors, companies, academics work on the same codebase, spot bugs, suggest improvements and push updates. The transparency means you can see exactly what the software does, how it does it and whether it has problems.
The open-source community behind a major project can number in the tens of thousands. Which is more eyeballs on the code than most proprietary vendors have employees.
A few characteristics that define open source:
- The source code is available and modifiable;
- Development happens through open collaboration;
- Licensing (MIT, Apache, GPL and others) governs how the code can be used and redistributed;
- Community support drives much of the maintenance and innovation.
It’s worth noting the open core model here too. Some companies release a base version as open source and sell proprietary features on top.
Redis, GitLab and Elastic have all used variations of this approach. It blurs the line between open source and proprietary. And it’s becoming more common as companies look for sustainable revenue alongside community-driven software development.
Examples of Open Source Software
You’re almost certainly using open source already. Even if you don’t think about it that way.
Linux powers the majority of the world’s servers and cloud infrastructure.
WordPress runs roughly 43% of all websites.
Kubernetes has become the standard for container orchestration.
PostgreSQL is one of the most trusted relational databases in enterprise use.
TensorFlow and PyTorch are the backbone of most machine learning development.
These open source platforms power everything from startups to Fortune 500 companies. They’ve proven that open-source software can be every bit as robust as proprietary alternatives. Sometimes more so. Thousands of eyes on the code tend to catch problems that a single vendor’s QA team might miss.
What Is Proprietary Software?
Proprietary software is owned by a company. The source code is not available to users: you get the product, but you don’t get to see (or change) how it works. Access comes through licences, subscriptions or one-time purchases.
The business model is straightforward. The vendor builds the software, controls the roadmap, provides support and charges for access. You’re paying for a finished product with dedicated maintenance, regular updates and (usually) a support team you can call.
Many proprietary products now operate as software as a service, where you pay monthly and the vendor handles hosting, updates and infrastructure. It’s convenient. Until you want to leave.
Examples of Proprietary Software
Examples of proprietary software include Microsoft Office (and the broader Microsoft 365 ecosystem), Adobe Photoshop and the Creative Cloud suite, Salesforce, Slack, Zoom. The companies behind them invest heavily in user experience, security infrastructure and feature development. And, they fund that investment through licence fees and subscriptions.
Proprietary software tends to come polished. The onboarding is smooth, the documentation is thorough and there’s someone contractually obligated to help when something goes wrong. That’s the deal.
Key Differences Between Open Source and Proprietary Software
Here’s a quick comparison of the core key differences between open-source and proprietary software:
| Feature | Open Source Software | Proprietary Software |
|---|---|---|
| Source code | Public, viewable and modifiable | Private, controlled by the vendor |
| Customisation | High – you can modify the source code | Limited to what the vendor allows |
| Upfront cost | Often free to use | Paid (licences, subscriptions, per-seat pricing) |
| Support | Community-driven; paid support available from some vendors | Dedicated vendor support |
| Control | User controlled | Vendor controlled |
| Flexibility | Adapt the software to your needs | Rely on the vendor’s roadmap |
| Security model | Transparent – anyone can audit the code | Closed – vendor handles security internally |
| Vendor lock-in risk | Low | Higher |
The table is useful as a starting point. But the differences will show up in practice. In how your team works with the software day to day and what happens when your needs change.
Advantages and Disadvantages of Open Source Software
Benefits of Open-Source Software
Lower cost. No licence fees means lower upfront spending. For startups and SMEs especially, open source tools eliminate one of the biggest barriers to getting started. The money you’d spend on software licences can go toward software development, infrastructure or hiring.
Flexibility and customisation. When you have access to the source code, you can modify the software to fit your specific requirements. Need a feature the community hasn’t built? Build it yourself or hire someone who can. You’re not waiting for a vendor to add it to next quarter’s release.
Community-driven innovation. Popular open-source projects benefit from thousands of contributors worldwide. Bugs get spotted quickly, features get proposed and debated and the pace of innovation can be remarkable. Kubernetes went from a Google internal project to the industry standard for container orchestration in about five years. Largely because of community momentum.
Transparency. You can audit the code yourself. For industries with strict compliance or data privacy requirements that transparency is a real advantage.
No vendor lock-in. If you’re unhappy with the direction an open-source project is heading, you can fork it. You always have the code. With proprietary software switching often means starting over.
Disadvantages of Open Source Software
Requires technical expertise. Open source software is free to use. But it’s rarely free to run well. You need developers who can install, configure, maintain and troubleshoot it. For companies without in-house engineering teams that gap can be expensive to fill.
Inconsistent support. Community support can be excellent for popular projects and nearly nonexistent for smaller ones. When you hit a critical bug, a GitHub issue doesn’t have an SLA. Nobody’s pager goes off. The community will get to it. Eventually. Probably.
Maintenance falls on you. Updates, security patches, compatibility testing – if you’re running open source in production, your team owns all of it. Nobody else is contractually responsible for keeping it running.
Security requires vigilance. The transparency of open source is a double-edged situation. Malicious package insertions in npm more than doubled in 2025, with over 10,800 malicious packages detected. Supply chain attacks increased 431% between 2021 and 2023 and reached a new record high in October 2025.
Open source code is safe when well-maintained, but “well-maintained” requires active effort. Using open source without monitoring your dependencies is like leaving your front door unlocked. And assuming nobody walks by.
Advantages and Disadvantages of Proprietary Software
Benefits of Proprietary Software
Dedicated support. When something goes wrong, you call someone right away. Proprietary vendors typically offer SLAs, dedicated account managers and tiered support. For companies where downtime means lost revenue, that support structure is a must.
Polished user experience. Proprietary software is often more intuitive out of the box. The vendor has invested in UX design, onboarding flows and documentation. Their business model depends on people using (and renewing) the product.
Security oversight. Vendors employ security teams and handle patching, updates and vulnerability management. For companies without large security teams of their own, this offloads a significant burden. Proprietary systems often come with compliance certifications already built in. This can save months of work for organisations in regulated industries.
Regular updates and roadmap. Proprietary software typically follows a predictable release cycle with new features, bug fixes and performance improvements handled by the vendor.
Disadvantages of Proprietary Software
Higher costs. Licence fees, per-seat pricing, annual renewals make proprietary software costs add up. Especially as your business scales. A tool that costs $50 per user per month feels manageable at 10 users. At 500, it’s a budget line that gets scrutinised.
Vendor lock-in. When your data, workflows and integrations are built around a proprietary platform, switching becomes painful and expensive. You rely on the vendor for pricing, feature decisions and platform direction. If they pivot, you pivot with them (or start a migration).
Limited customisation. You get the features the vendor decided to build. If you need something different, your options are usually: request it and wait, find a workaround or buy another tool. Modifying the source code is off the table. Dependence on the vendor’s roadmap. The feature you need might not be a priority for the vendor. And if the vendor gets acquired, changes pricing or discontinues a product, you’re navigating that disruption whether you planned for it or not.
Open Source vs Proprietary Software for Businesses
When Open Source Makes More Sense
Open source tends to be the stronger choice when your company has engineering capability and wants control. For example:
- Startups with development teams who can configure and maintain their own infrastructure;
- Companies building custom platforms where off-the-shelf proprietary products don’t fit the requirement;
- Organisations that need deep customisation, integration flexibility or the ability to move fast without waiting for a vendor’s release cycle.
Open source also works well as foundational infrastructure where the technology is mature, widely adopted and backed by large communities and commercial support options.
When Proprietary Software Makes More Sense
Proprietary software often wins when speed of deployment matters more than deep customisation. For example:
- Businesses that need a working solution quickly and don’t have the engineering team to build or maintain open-source alternatives;
- Companies where the core competency isn’t technology (think a law firm, an accounting practice, etc.) and the priority is using software that works reliably without thinking about it.
- Organisations in regulated industries where vendor-backed security certifications, compliance documentation and dedicated support are requirements.
The Hybrid Approach: Combining Open Source and Proprietary Software
In practice, most modern companies don’t pick one side but run a mix.
Open-source infrastructure (Linux servers, Kubernetes for orchestration, PostgreSQL for databases) combined with proprietary SaaS tools for specific functions (Salesforce for CRM, Slack for communication, Figma for design) alongside custom internal software built on open-source frameworks;
This hybrid strategy lets companies optimise each layer independently. Use open source where flexibility and control matter most. Use proprietary tools where the vendor’s polish and support save time and build custom where no existing software product fits.
The 2025 data from Mordor Intelligence supports this pattern: 96% of organisations maintained or expanded their open source use while simultaneously spending more on proprietary SaaS. The two aren’t competing. They happily coexisting. Whether open source or proprietary, the tool earns its place by solving a problem.
The hybrid approach also hedges risk. If a proprietary vendor changes pricing or gets acquired, your core infrastructure still runs on open source tools you control. If an open-source project loses momentum or community support, your business-critical workflows are still backed by proprietary vendors with SLAs.
Spreading your dependencies across both models gives you options and in technology options are worth a lot.
How Businesses Should Choose the Right Software Solution
There’s no universal answer, but there is a useful framework for thinking it through. Evaluate five things before you commit:
- Technical expertise. Do you have engineers who can manage open-source tools in production? If yes, open source gives you more control. If not, proprietary solutions with vendor support might be the safer starting point.
- Scalability needs. How will your software needs change as you grow? Open source offers flexibility to scale on your terms. Proprietary software often scales predictably but at increasing cost.
- Budget reality. Open source saves on licences but costs in engineering time. Proprietary software costs more upfront but may reduce maintenance overhead. Calculate the total cost of ownership.
- Security requirements. Both models can be secure. Open source requires active security management and dependency monitoring. Proprietary software offloads security to the vendor but you’re also trusting the vendor with less visibility into how they handle it.
- Customisation needs. If your business requires software that behaves in specific ways that off-the-shelf products don’t support, open source or custom development is the path. If standard features cover your needs, proprietary tools get you there faster.
The right answer usually involves weighing these factors against each other, against the specific product you’re building, the team you have and the timeline you’re working with.
Making the Right Choice
Open source and proprietary software each solve real business problems. Open source gives you transparency, flexibility and control. Proprietary software gives you polish, support and speed. Most businesses end up using both and are deliberate about where each model fits.
The decision matters because it affects your costs, your team’s capacity, your ability to customise and your long-term independence. Getting it right requires understanding what your organisation needs and being honest about what it can maintain.
At Lerpal, we’ve spent twenty years developing software solutions across both worlds. We help companies evaluate what makes sense for their context, design architectures that combine open source and proprietary tools effectively and build the custom software that ties it all together.
Whether you’re choosing a stack, migrating between platforms or building something entirely new – we’ve done it before and we’d be happy to do it with you.
Let’s talk about building the right software solution for your business.
