Note: this blog was last updated September 2026.
Should you use an open source CMS? Here's how to weigh the benefits, risks, and real costs before you decide.
Yes, for most growing businesses, if you have the technical staff to run it, or a vendor who does it for you. Open source doesn't mean free, and it doesn't mean risk-free. It means you own the decision, for better and worse.
If you're asking should you use an open source CMS, the answer depends on your team, your timeline, and your risk tolerance. This guide covers the 12 questions worth answering before you commit: what it actually costs, who maintains it, what happens if the license changes, and where the real security risk hides. Most of it isn't in the sales pitch.
Open Source vs. Free: What's the Real Difference?
Open source means the code is public and you're free to change it. It doesn't mean the software is free to run.
You'll still pay for hosting, support, and the developers who customize it. Whether that adds up to less than a proprietary platform depends entirely on your team and your project. Researchers who've studied this can't agree on a single number because the real cost lies in factors like staff time, security audits, and the amount of custom work your site needs. Anyone who tells you open source is always cheaper is skipping that part.
Does it Offer an Enterprise Edition or Enterprise Support?
Many open-source CMS platforms sell a paid enterprise version with security, support, and features that the free version doesn't have. That's normal, it's how the project stays funded.
Before you commit, check exactly what's missing from the free tier. Some vendors gate only minor extras. Others hold back the features an enterprise site actually needs: single sign-on, advanced permissions, multisite management. That makes the free version closer to a demo than a real option.
How Active, and How Governed, Is the Project?
Look past how busy the forums are. Check who actually controls the code.
A large, active user base is a good sign, but it isn't the whole picture. In 2024, a widely used open source tool was nearly compromised when a single trusted contributor spent years building credibility before inserting malicious code, a reminder that a project's size doesn't tell you who's reviewing changes.
Ask two things: Is the project backed by a foundation or multiple companies, or does one vendor control it? And has that control ever been contested through a licensing change, a trademark dispute, or a fork? Public disputes over control have happened even in mature, well-known projects. That history is worth checking before you build on top of one.
Will Your Development Team Want to Use it?
Open source CMS platforms are, by nature, incredibly flexible. With enough effort, all of them can be developed to do whatever you need. But if your development team is unfamiliar with or doesn't prefer a particular CMS, getting the right functionality will be difficult. One of the biggest draws of open source is a more affordable solution, but extended project timelines or new training undermine those savings.
Another consideration is whether the CMS works with your current technology stack. If most of your organization uses Microsoft and .NET, it doesn't make sense to build on a CMS written in Java. Some of the more popular open source CMS platforms by language:
Java: Alfresco, Liferay, LogicalDOC, OpenCMS, Magnolia
Microsoft ASP.NET: DNN, Kentico CMS, Umbraco
PHP: WordPress, Drupal, Joomla, Magento, TextPattern
Python: Django CMS, Mezzanine
Ruby on Rails: Radiant, Browser CMS, Refinery CMS
Will Your Content Editors and End Users Like it?
After development, you still need your content writers and administrators to actually use the CMS day-to-day. Many platforms offer trials or interactive demos that give your team a sense of what it's like to use the system. Let them flag pain points early, so your dev team can review whether there are easy fixes before launch.
How Mature Is the Product, Really?
WordPress, Joomla, and Drupal are all more than two decades old. That track record matters, but age alone doesn't guarantee a project is healthy today.
Check the release history, not just the founding date. A platform with no meaningful updates in the past year or two carries the same risk as a young, untested one, just with better marketing.
Does it Fit With the Rest of Your Platform?
Many open-source and headless CMS platforms are evolving into digital experience platforms, integrating capabilities typically associated with portals or ecommerce platforms. DXPs aim to meet the needs of companies undergoing digital transformation, with the goal of delivering better customer experiences, especially for ecommerce. They can be single products or a suite that works together; either way, every component of your web platform should be integrated and able to share data. If you're unsure how these categories differ, it's worth understanding the difference between a CMS, a portal, and a DXP before you commit to a platform.
CMS platforms are particularly critical because of the growing need to publish and manage content across every channel, quickly, which requires eliminating data silos and streamlining workflows. The user interface, support for user-generated content, and content management capabilities are all factors worth weighing here.
Are the Extensions and Plugins Actually Maintained?
This is where most open-source CMS security problems actually occur, not in the core software.
WordPress is the clearest example, because it publishes the most data: in 2025, 91% of new vulnerabilities in its ecosystem were found in plugins, not in WordPress itself. Some of those flaws were exploited within hours of being disclosed.
That doesn't mean every open-source CMS carries the same risk. Platforms with a smaller, vendor-reviewed extension marketplace behave differently than one where anyone can publish a plugin with no security review. Ask how extensions get approved before they're listed, not just how many exist.
Is a CMS Really the Product You Need?
Because of the popularity of solutions like WordPress, many people default to recommending an open-source CMS for every kind of website. But depending on your needs, another product category, like a portal or a full enterprise content management system, might be a better fit.
If you're considering an open source headless CMS as a general website builder or blogging platform, it's worth researching other product categories to confirm you're using the best-fit solution, especially if you also need flexible content workflows, ecommerce, or multiple site types.
How Often are Updates Released?
Frequent updates can risk taking your whole site down. Updates are unavoidable, but ideally, you should be able to test them on a staging site before they go live. If a provider releases updates every other week, that cadence can quickly become burdensome, so gauge this before you commit. Check user reviews to see whether people complain that updates break their sites.
Can the Platform Scale as Your Business Grows?
Even if you're starting with a small project, your CMS should be able to grow with you. A platform that works fine for a five-page microsite can buckle under the weight of a global site with multiple brands, languages, and business units.
When you're evaluating how to choose a scalable open source CMS, look for:
- Cloud-native architecture that supports containerization and orchestration, so you can scale infrastructure up or down as traffic changes
- Headless or composable capabilities that let you deliver content to web, mobile, and other channels without rebuilding your stack
- Multi-site and multi-tenant support, so a single instance can manage several brands, regions, or business units
- Elastic performance that can handle traffic spikes during launches, campaigns, or seasonal peaks without downtime
A CMS that scales well won't just support the project in front of you; it'll support the next five, too, without forcing you to re-platform every time your business grows.
Could the License Change After You've Already Built on it?
It can. Several major open-source projects have changed their licenses after a cloud provider began offering a competing hosted version, a pattern that's recurred at least 4 times since 2018 across different companies.
When that happens, you're usually left with two choices: pay for a commercial license or move to a community fork of the old version. Both are disruptive if you didn't see it coming.
You can't predict this with certainty, but you can check for warning signs: Is the project controlled by a single, venture-funded company? Has that company's paid product started competing directly with what cloud providers offer for free? Projects backed by multiple companies or a neutral foundation have historically been less likely to make this kind of change.
What You Actually Get From an Open-Source CMS
The benefits of an open source CMS come down to control over the code, the cost structure, and how long you keep using it. That's also why an open-source business CMS often outlasts a rigid proprietary one. That control comes with more responsibility, for security, for maintenance, for checking who's actually behind the project you're building on.
Liferay DXP is built on that trade-off deliberately: open source at the core, with the governance, support, and security review that a growing business needs layered on top. If you're evaluating options, see how Liferay DXP handles the questions above.
Frequently Asked Questions
What's the difference between open source and open core?
Open source means the full code is public. Open core means only part of it is. The rest sits behind a paid license. Most "free" enterprise CMS platforms are open-core, not fully open-source.
Does foundation backing guarantee a project is safe?
No. It lowers the odds of a single company changing the rules on you, but foundation-backed projects have still had public disputes over who controls the trademark or the main distribution channel.
What should you do if a vendor changes its license after you've built on it?
Check whether the community has forked the last open version; this has happened with several major relicensed projects, and compare the cost of switching to that fork against paying for the new commercial license.