Java licensing for startups: the free options.

If you are building a startup on Java, here is the most useful sentence you will read this week: you almost certainly never need to pay Oracle a cent for it. The Java language and platform are open source, multiple companies ship free, production-grade, fully supported builds of the Java Development Kit, and the entire ecosystem — Spring, build tools, libraries, frameworks — runs identically on those free builds. The only way a startup ends up with an Oracle Java SE Subscription bill is by accident: by downloading the wrong JDK, inheriting the wrong container base image, or not knowing the difference between "Java" and "Oracle's commercial build of Java." This article explains the free options, how to choose between them, and the small number of decisions that keep an early-stage company permanently outside Oracle's licensing net.

The good news for startups

Java licensing has a reputation for being a minefield, and for large enterprises with legacy estates it genuinely is. But that reputation can mislead a founder into assuming Java is expensive or risky to adopt. It is not. The confusion comes from conflating two different things. Java — the language, the specification, the OpenJDK source code — is open source and free to everyone, forever. Oracle JDK is one company's particular packaged build of that open-source project, and it is the only thing Oracle charges for. A startup that simply uses a free build of OpenJDK is using real Java, running real workloads, with no licence cost and no audit exposure. There is no feature you give up, no performance penalty, and no compatibility gap. The "free option" is not a budget compromise — for a startup it is the default, correct choice.

Why startups end up paying by accident

Startups rarely sign an Oracle Java contract deliberately. They drift into exposure. The mechanisms are predictable, and knowing them is half the defence.

The most common is the download habit. An engineer needs a JDK, searches "download Java," lands on Oracle's site, and installs Oracle JDK. Under Oracle's NFTC licence some recent versions are free for a time, but the free window closes, and older versions sit under restrictive terms. The binary looks identical to a free build; the licence attached to it is not. The second mechanism is container base images. A Dockerfile that starts from an image bundling Oracle JDK quietly inherits Oracle's terms into every deployment. The third is bundled runtimes — a tool, installer or appliance that ships its own Oracle JDK inside it. None of these involve a contract or a salesperson. They are silent, and they are exactly the usage an Oracle audit later surfaces. A startup avoids all of them by making one deliberate choice up front about which JDK it uses, and enforcing it.

The free distributions that cost nothing

Several organisations build, test and ship free distributions of OpenJDK suitable for production. All implement the same Java specification and pass the same compatibility testing; they differ mainly in who maintains them, how long each version is supported, and the surrounding tooling.

Any of these will run a startup's production workload at zero licence cost. For a wider survey of what each offers, see our guides to the best OpenJDK distributions and the free Java versions list.

Choosing a distribution

For most startups the choice is genuinely low-stakes — the distributions are interchangeable in practice, and moving between them later is straightforward because they all implement the same standard. That said, two sensible heuristics narrow it down. First, follow your cloud: if you run on AWS, Amazon Corretto is a frictionless fit; on Azure, the Microsoft build is convenient; on a vendor-neutral or multi-cloud footing, Eclipse Temurin is the safe default. Second, care about long-term support: pick a distribution that publishes free security updates for the long-term-support (LTS) releases — currently Java 17 and Java 21 — for several years, so you are not forced into a major version jump on someone else's timetable. Corretto, Temurin, Zulu and Liberica all do this. The decision that matters is not which free distribution — it is committing to one, documenting it, and making sure every engineer and every container uses it.

What a startup almost never needs is paid Java support. Commercial support contracts — whether from Oracle or a third party — make sense for organisations with strict regulatory requirements or large legacy estates. An early-stage company moving fast on current LTS versions gets everything it needs from the free builds and the community. If a genuine support need emerges later, it can be addressed then; it is not a day-one cost.

The traps to avoid early

A startup stays free by avoiding a short list of predictable mistakes. None require deep licensing expertise — just awareness.

• The default download. Never let "download Java" mean "download Oracle JDK." Make the chosen free distribution the only sanctioned source, and document the download URL.
• Oracle container base images. Audit your Dockerfiles. A base image that bundles Oracle JDK carries Oracle's terms into production. Pin a base image built on a free distribution instead — relevant to any containerised deployment.
• Developer laptops. Oracle's metric is not limited to servers. Oracle JDK installed on engineers' machines counts too. Standardise the development environment on the free distribution.
• Bundled Oracle JDK. Some third-party tools and installers ship Oracle JDK inside them. Knowing this exists is enough to spot it during procurement.
• Inherited exposure from acquisitions. If your startup acquires or merges with another company, you inherit its Java estate — including any Oracle JDK it was running. Check before the deal closes.
• Assuming the NFTC means "always free." Oracle's no-fee terms for recent versions have a time-limited free-use window. Free distributions have no such window. Standardising on a free build removes the question entirely.

Each of these is a one-time decision. Made early, they cost nothing and prevent the slow accumulation that turns into a six-figure surprise three years later — the pattern explored in our analysis of Oracle Java versus free alternatives.

A one-page Java policy

The single most effective control for a startup is a Java policy short enough that everyone actually reads it. One page is plenty. It should state four things: the approved distribution and the exact place to download it; the approved versions (current LTS releases); a ban on Oracle JDK anywhere — servers, laptops, CI, containers — unless explicitly licensed; and a named owner who approves exceptions and reviews the policy when the team adds a new platform. Pair it with one technical control — a pinned base image, or a CI check that fails the build if an Oracle JDK is detected — and the policy enforces itself. This is the lightweight, startup-appropriate version of the deployment governance larger enterprises build, and it scales: a company that starts disciplined never has to run the expensive remediation projects that undisciplined companies eventually face.

The bottom line for founders is simple. Java is one of the few major enterprise technologies a startup can adopt at genuine zero cost, with no compromise and no vendor relationship to manage. The free options are not second-best — they are the standard. Spend ten minutes choosing a distribution, write the one-page policy, and Oracle Java licensing becomes a problem you have permanently designed out of your company. If you ever do need to confirm your position, an independent compliance assessment will verify in days that you owe Oracle nothing.

Frequently asked questions

This article is general information on Oracle Java licensing, not legal advice. Oracle's terms vary and change over time. Consult qualified counsel and an independent Java licensing specialist for advice on your specific environment.