Why Open-Source Hardware Is Harder Than Open-Source Software

Open-source software works because the cost of copying is zero. You publish your source code to GitHub, anyone in the world can fork it, compile it, run it, modify it, and publish their changes. The infrastructure to do this is nearly free. The reproduction cost is electricity and time. This is the fundamental economic property that makes open-source software viable: perfect, costless reproduction enables the collaboration and distribution model that the open-source ecosystem depends on.

Hardware doesn’t work this way. Publishing your circuit schematics, PCB layout files, and bill of materials to GitHub creates a meaningful open-source artifact — it gives others the information they need to build your design. But “building it” costs money: components, PCB fabrication, assembly. Each instance of a hardware design that gets made requires real materials and manufacturing, which is why open-source hardware faces challenges that open-source software doesn’t, and why the model has evolved differently.

The Reproduction Cost Problem

When someone forks a software project, they have a working copy of the software immediately. When someone forks a hardware project — downloads the design files and attempts to build it — they face several sequential challenges: sourcing components, getting PCBs fabricated, assembling them, debugging any issues with the physical build, and potentially dealing with component substitutions if the original parts are unavailable.

Each of these steps has costs. Component sourcing requires either having a supplier relationship (for volume production) or paying retail/distributor prices for small quantities. PCB fabrication from services like JLCPCB or PCBWay starts at a few dollars for simple two-layer boards but scales with layer count, complexity, and quantity. Assembly (soldering components to the PCB) requires either skill and time for hand soldering or cost for professional assembly services. The total cost to produce a single copy of even a simple hardware design can run $20–100 before you know if the design works correctly.

This reproduction cost creates a fundamental difference in the contribution dynamic. Contributing to an open-source software project requires a computer and time. Contributing to an open-source hardware project requires a computer, time, and money to fabricate physical prototypes. This limits who can practically contribute to hardware projects and creates a much narrower base of potential contributors than software.

The Component Availability Challenge

Software dependencies are typically a URL or a package name — pull the library, include it in your build, and it works across platforms (with appropriate caveats). Hardware components are physical parts with part numbers, manufacturers, package types, and availability that varies by region, time, and supply chain conditions. The component availability crisis of 2021–2022 demonstrated dramatically that hardware designs depending on specific parts can become unbuildable overnight when those parts go out of stock or their prices spike.

Designing for component availability and specifying acceptable substitutes is an additional engineering concern that software has no analog to. A well-documented open hardware project specifies not just the exact component used but the electrical characteristics that make a component suitable, so that a builder can substitute an equivalent part when the original is unavailable. This documentation discipline requires significant extra effort and expertise.

The component landscape also changes over time in ways that affect hardware designs more than software. A microcontroller that was easy to source in 2020 might be discontinued, in a new package, or only available at elevated prices in 2026. Open-source hardware designs, unlike software, can become difficult or impossible to reproduce as their component landscape shifts.

Licensing: Harder to Enforce and Less Well-Defined

Software licenses — MIT, GPL, Apache 2.0 — are legally well-developed and practically enforceable because violating a software license means copying protected code, which is straightforward to demonstrate. The Open Source Hardware (OSHW) movement has developed the CERN Open Hardware License and variations of Creative Commons licenses for hardware, but enforcement is significantly harder.

A company can manufacture a product based on an open-source hardware design without distributing their modified design files, and demonstrating that they copied rather than independently derived the design is technically challenging. The legal framework for hardware IP is based on patents rather than copyright, and most open-source hardware projects don’t hold patents. The result is that commercially successful open hardware designs often attract copycats who manufacture and sell versions without contributing back — behavior that would violate a copyleft software license but is difficult to prevent in hardware.

The Arduino ecosystem is the most prominent example of this dynamic. Arduino’s original designs are open source, and the Chinese clone market produces millions of “Arduino-compatible” boards that closely follow the original designs while paying nothing to the original project. The Arduino organization has navigated this through trademark (the “Arduino” name is protected even if the design is open), but many other open hardware projects have fewer resources to pursue trademark enforcement.

Where Open Hardware Has Succeeded

Despite these challenges, open-source hardware has produced genuinely influential and successful projects. Arduino itself — despite the clone market — built an ecosystem of tools, libraries, and educational resources that transformed hobbyist electronics. The Raspberry Pi, while not fully open in all its components (the Broadcom SoC is proprietary), operates with an open platform ethos that has created a large ecosystem. The RISC-V instruction set architecture is a fully open ISA with a growing ecosystem of open implementations that is beginning to appear in production chips.

The RepRap project — an open-source self-replicating 3D printer — directly produced the consumer 3D printer market by making the designs for functional FDM printers freely available. The Prusa printer, which became the dominant desktop FDM printer in the hobbyist market, is based on RepRap lineage and continues to release hardware designs openly. The consumer 3D printing ecosystem that exists today traces directly to open hardware development.

Open hardware’s most viable model appears to be: open design files as a transparency and trust mechanism for a company that sustains itself through selling assembled products, kits, or professional services. Arduino, SparkFun, Adafruit, Prusa, and Crowd Supply all operate on variations of this model — the openness is genuine (design files are actually published, contributions are accepted), but the revenue comes from manufacturing and distribution rather than from the designs themselves. The pure volunteer collaboration model that sustains many software projects is rare in hardware because the material cost floor doesn’t allow it.

What This Means for the Field

Open-source hardware has matured significantly over the past fifteen years and has produced real infrastructure for the maker and electronics communities. The tools for hardware development (KiCad for PCB design, FreeCAD and FusionCAD for mechanical design, OpenSCAD for parametric modeling) have improved dramatically and are themselves open source, lowering the barrier to creating and sharing designs.

The challenges — reproduction cost, component availability, licensing enforcement — are structural rather than solvable by better tooling, and they mean open hardware will always look different from open software. The model that works is one that embraces the constraint: use openness to build trust and community, use commercial products to generate the revenue that sustains development. This is the Arduino model, the Prusa model, the Adafruit model, and it has proven durable. The dream of purely volunteer-sustained open hardware projects with the collaborative scale of Linux is probably unrealistic given the economics — but the hybrid model has built real, lasting, and valuable things that wouldn’t exist without the open-hardware philosophy.