SOM vs. SBC: Which Architecture Wins for Your Application?

SOM: Flexibility and Long-Term Scalability

A SOM gives you a pre-integrated compute platform, but leaves system design in your control. That separation between the compute module and the carrier board is where the real value is.

From an engineering standpoint, one of the biggest benefits is removing the hardest parts of board design. High-speed DDR routing, PMIC sequencing, and processor bring-up are already handled. Those are some of the highest-risk areas in a chip-down design, both in terms of signal integrity and time-to-debug. For example, if you’re designing an industrial gateway that needs dual Ethernet, CAN-FD, and PCIe expansion, a SOM lets you focus on those interfaces directly on your carrier board. You’re not also trying to validate memory timing or debug boot issues at the same time.

The flexibility shows up when requirements change. Say your product starts as a single-display HMI but later needs:

• A second display output
• Additional USB ports
• A different wireless module
• A new enclosure

With a SOM, those changes are handled at the carrier board level. The compute platform stays the same. That means your software stack, bootloader, and validation work carry forward.

It also creates a clear upgrade path. If you design around a standard like SMARC, moving from an i.MX 93 to an i.MX 95 SOM can be a drop-in change. That avoids a full redesign when performance requirements increase. This is why SOMs are often used in long lifecycle products like medical devices, industrial controllers, and robotics. The hardware can evolve without breaking the system architecture.

Listed below are a few of our most popular SOMs. To learn more about our SOM portfolio, visit: www.ezurio.com/som

SBC: Simplicity and Speed to Deployment

SBCs take the opposite approach. Everything is already integrated into a single board, which removes almost all hardware design work upfront. For engineers, this means you can go from power-on to application development immediately. If you’re building something like a proof-of-concept for a vision system, you can:

• Connect a camera
• Bring up Linux
• Run inference models
• Validate performance

…all without touching hardware design. That’s a real advantage in early development.

SBCs also simplify validation. The interfaces are already laid out, power delivery is handled, and peripherals are known to work together. You’re not debugging whether your USB PHY routing is correct or if your display timing is off. But this is where the limitations start to show. If your product needs a different form factor, you’re stuck working around the board. If you only need 4 USB ports but the SBC has 8, you’re paying for unused components. If your enclosure requires connectors on a different edge, that becomes a mechanical compromise.

A common example is moving from prototype to production. A team might prototype on an SBC for speed, but when they move toward production, they realize:

• The board is too large
• There are unnecessary components increasing BOM cost
• The connector layout doesn’t fit the enclosure
• Power consumption isn’t optimized

At that point, they either accept this or redesign. That’s where many teams pivot toward SOM + custom carrier or a fully custom SBC.

The Real Tradeoff: Control vs. Convenience

At the system level, the difference between a SOM and an SBC comes down to how much control you retain versus how much is predefined for you.

This distinction goes beyond hardware—it directly affects software reuse. Designing around a SOM allows you to maintain consistency in your BSP and drivers even as you iterate on carrier boards. In contrast, switching SBC platforms often forces partial or full rework of software integration.

Lifecycle planning is also materially different. If a component on an SBC reaches end-of-life, redesign options are constrained. With a SOM-based approach, the module vendor typically absorbs those changes, allowing you to preserve your carrier design and reduce disruption.

This is where the real cost emerges. Not in the initial bill of materials, but in redesign cycles, validation effort, and long-term maintenance.

Where Custom SBCs Fit In

This is where most real products end up. Many teams start with a SOM for flexibility and speed, then move to a custom SBC once the system requirements are locked. At that stage, the goal shifts to optimization  like removing unused interfaces to reduce BOM cost, adjusting board size to fit the enclosure, optimizing power for the actual workload, and integrating only the required peripherals.

For example, a medical device might begin with a SOM-based development kit for rapid prototyping. Once the design is validated, the final product transitions to a custom SBC that includes only the necessary USB ports, a display interface, and integrated wireless. The result is a production-ready board built around a proven compute platform.

This approach avoids one of the biggest risks in embedded design: committing too early to an architecture before requirements are solidified. It also shows how many teams operate in practice. Pre-built SOMs and SBCs can significantly reduce development time, usually by 9 to 12 months, by eliminating the most complex aspects of hardware and software bring-up.

Where Ezurio Fits In (And Where Others Fall Short)

Most vendors stop at the hardware. They provide a SOM or SBC, maybe a BSP, and expect the engineering team to handle the rest. That works for teams with large internal resources, but it creates friction for everyone else.

The difference with Ezurio is the full system approach. From an engineering perspective, that shows up in very practical ways:

• Pre-integrated wireless: Instead of designing RF from scratch, Wi-Fi and Bluetooth are already certified and validated. That removes one of the most failure-prone parts of embedded design.
• Consistent software support: BSPs, drivers, and OS support are maintained across platforms, reducing the effort required to move between SOMs or into production.
• Clear upgrade paths: Standardized form factors like SMARC and Open Standard Module (SOM) allow processor upgrades without full redesigns.
• Custom design capability: Moving from SOM-based development to a custom SBC does not require switching vendors or restarting the design process.
• Engineering support: Access to FAEs and design engineers who understand both hardware and software integration reduces debug time and risk.

Where other vendors often fall short is in continuity. You can prototype quickly, but transitioning to production becomes a separate effort. With Ezurio, the path from evaluation to production is continuous. That’s what reduces overall development time and risk. 

Visit www.ezurio.com/sbc to learn more about our single-board computer solutions.

Visit www.ezurio.com/som to learn more about our variety of system-on-module solutions.