MedAcuity vs Plexus: full comparison for 2026
Quick verdict
MedAcuity (4.3/5) edges ahead of Plexus (3.8/5) overall. MedAcuity is the better choice for device makers with hardware but no software team. Plexus is the stronger option for complex capital equipment needing build and sustaining. The right choice depends on your project size, budget, and required tech stack.
MedAcuity vs Plexus: head-to-head summary
| Criterion | MedAcuity | Plexus |
|---|---|---|
| Founded | 2007 | 1979 |
| HQ | Westford, MA, USA | Neenah, WI, USA |
| Team size | 100–130 | ~20,000 |
| Rating | 4.3 / 5 | 3.8 / 5 |
| Primary differentiator | US-based, ISO 13485 certified team that does nothing but regulated device software | Engineering, NPI and sustaining services for low-to-mid volume, high-complexity medical equipment |
| Pricing model | Time and materials, fixed project | NPI contract, manufacturing supply agreement |
| Min. engagement | Not disclosed | Not disclosed |
| Primary tech stack | Embedded C/C++, C#/.NET, Qt | PCB design, PCB assembly, Embedded C/C++ |
| Industries served | Surgical & robotics, Diagnostics & lab devices, Digital health, Implantables & neuromodulation | Surgical & robotics, Diagnostics & lab devices, Aerospace, Industrial |
MedAcuity vs Plexus: overview
MedAcuity
MedAcuity was founded in 2007 by software engineers and is based in Westford, Massachusetts. It concentrates on medical technology software: architecture, embedded and application development, risk management and the technical documentation behind FDA submissions, with experience across Class I, II and III and PMA devices. It is ISO 13485:2016 certified, and listings put its team at about 119 people. In 2021 it partnered with Fathom Consulting to add human factors engineering.
Plexus
Plexus Corp. is a NASDAQ-listed company headquartered in Neenah, Wisconsin, that offers design and development, supply chain, new product introduction, manufacturing and sustaining services. Healthcare and life sciences is one of its three markets alongside aerospace and defense and industrial. Its healthcare work includes surgical equipment, imaging equipment and diagnostic instruments. The company has around 20,000 employees in total, though only part of that is healthcare.
Services and capabilities: MedAcuity vs Plexus
| Capability | MedAcuity | Plexus |
|---|---|---|
| Electronics & PCB design | ✗ | ✓ |
| Firmware & embedded software | ✓ | ✗ |
| SaMD & companion apps | ✓ | ✗ |
| Connected devices & IoT | ✗ | ✗ |
| Industrial design & human factors | ✗ | ✗ |
| Mechanical engineering | ✗ | ✓ |
| Device cybersecurity | ✓ | ✗ |
| Regulatory & QMS support | ✓ | ✓ |
| Manufacturing & scale-up | ✗ | ✓ |
Tech stack comparison: MedAcuity vs Plexus
| Framework / platform | MedAcuity | Plexus |
|---|---|---|
| Embedded C/C++ | ✓ | ✓ |
| Embedded Linux | N/A | N/A |
| RTOS | N/A | N/A |
| BLE | N/A | N/A |
| Cloud (AWS/Azure) | ✓ | N/A |
| IEC 62304 | ✓ | N/A |
| ISO 14971 | ✓ | N/A |
| ISO 13485 QMS | N/A | ✓ |
| Qt | ✓ | N/A |
Pricing comparison: MedAcuity vs Plexus
| Criterion | MedAcuity | Plexus |
|---|---|---|
| Minimum engagement | Not disclosed | Not disclosed |
| Engagement models | Fixed project, Time & materials | Fixed project, Manufacturing contract |
| Rate transparency | Not public | Not public |
| Price tier | Mid-market | Mid-market |
Target audience comparison: MedAcuity vs Plexus
| Dimension | MedAcuity | Plexus |
|---|---|---|
| Best company size | Startup to mid-market | Startup to mid-market |
| Best industries | Surgical & robotics, Diagnostics & lab devices, Digital health | Surgical & robotics, Diagnostics & lab devices, Aerospace |
| Best use cases | Writing and documenting the control software for a surgical system, Remediating software documentation gaps before an FDA submission | Building and sustaining a diagnostic imaging subsystem, Electronics redesign for component obsolescence |
| Typical project type | Fixed project | Fixed project |
MedAcuity vs Plexus: pros and cons
| MedAcuity | |
|---|---|
| + | Software-only focus means IEC 62304 documentation and traceability are part of every project |
| + | Experience with PMA-level Class III software |
| + | US onshore team helps with data access and IP-sensitive programs |
| + | Secure lab space for testing with client hardware |
| - | Does not design hardware, so you need another partner for electronics and mechanics |
| - | US onshore rates are higher than nearshore software teams |
| - | Human factors work is handled through the Fathom partnership instead of an in-house group |
| Plexus | |
|---|---|
| + | Strong with complex, lower-volume capital equipment such as imaging and surgical systems |
| + | Offers product engineering as well as manufacturing |
| + | Sustaining engineering over long product lives |
| + | Public company with transparent financial reporting |
| - | Generalist manufacturer; healthcare competes with aerospace and industrial for capacity |
| - | Not a fit for early-stage concept work |
| - | Most engineering engagements lead toward a manufacturing contract |
Who should choose MedAcuity?
A typical fit: writing and documenting the control software for a surgical system.
US-based, ISO 13485 certified team that does nothing but regulated device software. Minimum engagement is not publicly disclosed. Works best with clients in Surgical & robotics, Diagnostics & lab devices, Digital health, Implantables & neuromodulation.
Who should choose Plexus?
A typical fit: building and sustaining a diagnostic imaging subsystem.
Engineering, NPI and sustaining services for low-to-mid volume, high-complexity medical equipment. Minimum engagement is not publicly disclosed. Works best with clients in Surgical & robotics, Diagnostics & lab devices, Aerospace, Industrial.
Decision matrix: MedAcuity vs Plexus
| Your situation | Recommended choice |
|---|---|
| You need full-ownership delivery on a defined project scope | MedAcuity |
| You need a large dedicated team for an ongoing programme | Check each company's engagement model |
| Your budget is at the lower end | Compare: MedAcuity (Not disclosed) vs Plexus (Not disclosed) |
| You need specialist depth in a specific vertical | MedAcuity |
| You need staff augmentation or team extension | Neither; consider alternatives that offer staff aug |
| You need consulting before committing to a build | Both may offer discovery engagements |
Use case fit: MedAcuity vs Plexus
| Use case | MedAcuity fit | Plexus fit | Winner |
|---|---|---|---|
| Writing and documenting the control software for a surgical system | Strong | Limited | MedAcuity |
| Remediating software documentation gaps before an FDA submission | Strong | Limited | MedAcuity |
| Building and sustaining a diagnostic imaging subsystem | Strong | Strong | Both equally |
| Electronics redesign for component obsolescence | Limited | Strong | Plexus |
Verdict: MedAcuity vs Plexus
MedAcuity (4.3/5) is the stronger overall choice for most Medical Device Development projects. US-based, ISO 13485 certified team that does nothing but regulated device software.
Plexus (3.8/5) is worth a look if you need electronics redesign for component obsolescence. If your situation matches that, Plexus is a competitive option.
Related comparisons
MedAcuity vs Plexus FAQ
Is MedAcuity better than Plexus?
MedAcuity (4.3/5) scores higher overall, but "better" depends on your use case. MedAcuity's strongest advantage: software-only focus means IEC 62304 documentation and traceability are part of every project. Plexus's strongest advantage: strong with complex, lower-volume capital equipment such as imaging and surgical systems.
How do MedAcuity and Plexus differ in pricing?
MedAcuity uses time and materials, fixed project pricing. Plexus uses npi contract, manufacturing supply agreement pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.
Which is better for enterprise: MedAcuity or Plexus?
MedAcuity is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each company before shortlisting.
What are the main differences between MedAcuity and Plexus?
MedAcuity's primary differentiator is: US-based, ISO 13485 certified team that does nothing but regulated device software. Plexus's primary differentiator is: Engineering, NPI and sustaining services for low-to-mid volume, high-complexity medical equipment. They also differ in team size (100–130 vs ~20,000), minimum engagement (Not disclosed vs Not disclosed), and primary industries served (Surgical & robotics, Diagnostics & lab devices vs Surgical & robotics, Diagnostics & lab devices).
Verify all details directly with each company before making a decision.