KendoReact vs. OSS: What You Can Actually Get for Free (and What You Can’t)

There’s no shortage of React component libraries out there, many of them open-source or free to use.

Developers often look at a commercial component library and think, “Why would I ever pay for something I could get for free from someone else?” And it’s a fair question to ask! The answer often depends primarily on a) what you’re building and b) how much experience you (and your team) have building and maintaining frontend components.

If you’ve reached the point where free UI libraries are starting to cause friction, it may be time to consider whether they’re still the right choice for your team—and your app.

In this article, we’ll break down how to evaluate open-source vs. commercial UI libraries in practical terms, including:

• The right choice for getting started with a new project
• The cost shifts as engineering time, maintenance and integration needs scale up
• Questions about predictability, support and overhead
• How to balance all the pros and cons to make the choice that best suits your needs

Who’s Building the Library?

The number one difference between an open-source (OSS) and commercial library is, of course, who builds and maintains the components.

Open-source projects are community-built and supported, which has some distinct benefits: most notably, that means you can get involved, personally! If you have a specific dream or vision for improving an open-source project, there are incredible OSS organizers out there who would love you to work with them to make those improvements a reality. It’s a chance to both sharpen your skills as a developer and work alongside some truly amazing people. OSS projects are wonderful for identifying a need in the development community and quickly filling that gap.

On the flip side, the rise of AI and “vibe coding” is a real emerging challenge in the OSS world right now. Well-intentioned organizers are struggling to sort through low-quality generated issues and code submissions.

Open-source is also (and always has been) volunteer-based. While some extremely popular OSS projects receive financial backing, the majority are reliant on volunteer contributions. That can make it a challenge for projects to sustain development over long periods of time.

Commercial component libraries, on the other hand, are built by teams of developers who are financially compensated for their time and efforts. This has a few distinct benefits. For one, it means that developers are more likely to stay on the team for long periods of time—and that institutional knowledge helps create a more stable product. It also means that the library can be the primary focus of the developers on the team, rather than something they contribute to in their spare time on evenings or weekends.

How Is the Library Maintained?

A library is more than just its first version. As the fields of web development and software engineering evolve, the tools we use have to evolve with it. Even if a tool is perfect when it’s created, will it still be useful in six months? What about in a year? Five years? Many React developers still feel the pain of Create React App’s slow decline—and that wasn’t even a tiny, niche project!

This is one of those times when what you’re building weighs into the decision-making process heavily. If you’re working on a side project of your own, then this matters far less. The same is true if you’re prototyping a new idea, testing a new technology or similar. Those are great opportunities to reach for open-source options!

However, if you’re migrating a legacy application, adding new features to an app with a significant userbase or building enterprise software, the longevity and dependability of your tooling matters—a lot!

It’s also about more than just whether or not the library is still being updated; it’s also about how often those updates happen, and whether or not there’s a regular cadence. If you know that a library will get quarterly updates, you can start planning ahead on your own development cycles with that in mind. It offers the ability to be proactive—instead of reactive—when it comes to planning around potentially breaking changes in version upgrades.

What Support Is Available?

As mentioned earlier, one of the biggest perks of open-source software is the community that surrounds it. Popular projects often have vibrant, engaged groups of developers to help answer questions or write documentation. They also tend to have many resources (like tutorial videos or blogs) written by users, so you can often make a quick Google search and find someone who’s tackling a similar problem to the one you’re dealing with.

However, much like maintenance—can you be sure that the community will be there for the long haul? If you’re still using this tool in five years, will there also still be an active chat you can ask questions to … or will another tool have become more popular in the meantime?

Additionally, there’s also the question of professional support. Of course, it’s handy to be able to Google things and find walk-throughs and tutorials, but what if you need to ask a specific implementation question? Is there someone available to get on a call with you or walk through your individual use case to troubleshoot the issue? If you post on a support forum, are you comfortable with just hoping someone with enough experience will be able to answer your question—or are you working on a project critical enough that you need to know a dedicated support professional is available if (or perhaps, when) things go wrong?

Does It Meet the Required Standards?

This is another one that depends a lot on what you’re building—and who you’re building it for. If you’re building software that needs to meet certain accessibility or security requirements, you may have a harder time verifying that compliance with open-source solutions.

For example, do you need something that’s certified ISO 27001 or SOC 2 compliant? Do you need be able to provide the ACR to show that a given tool meets Section 508 standards? Are you confident that the tools you’re using will be updated to meet WCAG 3.0 standards, when that releases?

While this may not be a concern for every piece of software, when it matters—it really matters!

What Tool Integrations Are Available?

Good systems designers know that choosing a tool is about more than the capability of the tool itself. It’s about how that tool works with all the other tools in your system—and the people who have to use it!

For example, let’s talk about design: if you have primarily backend or full stack developers and no designers, it may make sense to choose a component library that comes with lots of built in themes—or even full theming software! If you’re already using CSS tools Tailwind or Bootstrap, you should find a component library that will work well with those options. If you do have designers and they work in Figma, choosing a component library that offers Figma UI Kits would probably be something that wins you some points with them!

When you’re assessing tools, it’s important to keep in mind the big picture—not just how the tool works in isolation, but how it fits into your entire project and team’s workflow.

How Does This Work with AI?

Similarly, what about AI? If your team is already using VS Code and Copilot, a library that offers Copilot integrations would be most efficient. If you know you’re going to need AI-powered features in your app, finding a component library that’s made to support that can save you a lot of time and effort.

Working with component libraries that don’t offer specialized AI tools means that you have to make do with the generic AI output for those components—which may be OK enough for smaller projects, but can quickly become a stumbling block at scale. If your AI tool only has a basic understanding of things like the library’s API, design system or best practices, the code you get back is going to take a lot of revision before it’s production ready. By choosing a component library that offers integrated AI tools, you can get back a higher quality caliber of output—saving you time, tokens and iteration cycles.

Which Option Is the Right Fit for Your Team?

As you can see, there’s a lot to consider when it comes to tooling decisions—and the decision rarely comes down to cost, alone. Instead, it’s about where you want to invest engineering time: building product features or building UI infrastructure. For teams that are already feeling the limits of open-source approaches, the question isn’t necessarily “why pay for UI components,” but rather “what is the cost of continuing to build and maintain this ourselves?”

For smaller teams and projects, open-source can be a fantastic solution—and it comes with the benefit of getting to be an active participant in the ecosystem of the tooling you use.

For larger teams and enterprise products, the stability, support and extensibility of commercial libraries may make them a better fit. When you find a library that checks all these boxes—stable maintenance, professional support, compliance certifications and strong ecosystem integrations—it may be worth investing in.

When Open-source UI Libraries Are the Right Fit:

• You’re building a prototype, MVP or internal tool
• Your UI requirements are relatively simple
• Your team is comfortable owning and maintaining UI infrastructure
• You’re not worried about long-term scalability, accessibility or compliance concerns

When a Commercial UI Library Makes More Sense:

• You’re building a production-grade or enterprise application
• Your UI includes complex components (such as grids, schedulers or data-heavy views)
• Performance, accessibility and consistency are critical
• Your team is losing time integrating, fixing or extending free UI libraries
• You need predictable support and long-term stability

These tradeoffs are real, and there's no universally right answer. If a commercial library sounds like the right fit, Progress KendoReact is worth a look—it's designed with exactly these enterprise considerations in mind. It’s free to try for 30 days, including full support to help you get up and running.

And if that feels like more than you need at this point, there’s always KendoReact Free: a customizable, enterprise-quality React UI library with no license or sign-up required. Just npm download and start building! Check out the recap below to help figure out which option is the best choice for you.

OSS vs. Commercial Libraries at a Glance

Get Started with KendoReact