Simbex vs Flex Health Solutions: full comparison for 2026
Quick verdict
Simbex (3.9/5) edges ahead of Flex Health Solutions (3.8/5) overall. Simbex is the better choice for sensor wearables and biomechanics research. Flex Health Solutions is the stronger option for design transfer into global contract manufacturing. The right choice depends on your project size, budget, and required tech stack.
Simbex vs Flex Health Solutions: head-to-head summary
| Criterion | Simbex | Flex Health Solutions |
|---|---|---|
| Founded | 2000 | 1969 |
| HQ | Lebanon, NH, USA | Austin, TX, USA / Singapore |
| Team size | 11–100 | Large (Flex Ltd.) |
| Rating | 3.9 / 5 | 3.8 / 5 |
| Primary differentiator | Biomechanics and sensor research background applied to wearable health devices | Dedicated NPI center and design sites that feed directly into Flex's medical manufacturing network |
| Pricing model | Time and materials, fixed project | Manufacturing supply agreement, NPI contract |
| Min. engagement | Not disclosed | Not disclosed |
| Primary tech stack | BLE, Embedded C/C++, Sensor fusion | PCB assembly, Injection molding, Automated assembly |
| Industries served | Wearables & remote monitoring, Sports technology, Digital health | Drug delivery, Diagnostics & lab devices, Surgical & therapeutic devices |
Simbex vs Flex Health Solutions: overview
Simbex
Simbex was founded in 2000 in Lebanon, New Hampshire, and works on product design, applied research and commercialization in medtech, health tech and sports technology. Riddell, the American football helmet maker and a long-time client, acquired it in April 2024. Its medical work includes RestEaze, a remote monitoring device for sleep disorder diagnosis built with Tanzen Medical, and fall-detection wearables. Team size estimates range from 11 to 100.
Flex Health Solutions
Flex Health Solutions is the healthcare division of Flex Ltd. and operates as a contract development and manufacturing organization (CDMO) for medical devices and pharma. Flex lists 26 manufacturing sites, six design and engineering sites, 16 FDA-registered entities and 21 ISO 13485 sites for health (per company website; independently unverifiable). In 2025 it opened a North American new product introduction (NPI) center for healthcare customers, and it shared a 2025 PDA Drug Delivery Innovation Award with Merck KGaA for an autoinjector.
Services and capabilities: Simbex vs Flex Health Solutions
| Capability | Simbex | Flex Health Solutions |
|---|---|---|
| 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: Simbex vs Flex Health Solutions
| Framework / platform | Simbex | Flex Health Solutions |
|---|---|---|
| Embedded C/C++ | ✓ | N/A |
| Embedded Linux | N/A | N/A |
| RTOS | N/A | N/A |
| BLE | ✓ | N/A |
| Cloud (AWS/Azure) | N/A | N/A |
| IEC 62304 | N/A | N/A |
| ISO 14971 | N/A | N/A |
| ISO 13485 QMS | N/A | ✓ |
| Qt | N/A | N/A |
Pricing comparison: Simbex vs Flex Health Solutions
| Criterion | Simbex | Flex Health Solutions |
|---|---|---|
| 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: Simbex vs Flex Health Solutions
| Dimension | Simbex | Flex Health Solutions |
|---|---|---|
| Best company size | Startup to mid-market | Startup to mid-market |
| Best industries | Wearables & remote monitoring, Sports technology, Digital health | Drug delivery, Diagnostics & lab devices, Surgical & therapeutic devices |
| Best use cases | Sensor-based wearable for remote monitoring, Biomechanics research study for a device concept | Transferring a verified design into volume production, Pre-clinical and design verification builds |
| Typical project type | Fixed project | Fixed project |
Simbex vs Flex Health Solutions: pros and cons
| Simbex | |
|---|---|
| + | Strong sensor and biomechanics research skills |
| + | Experience with wearable monitoring devices |
| + | Covers design through commercialization planning |
| + | Small team with direct access to principals |
| - | Owned by Riddell since April 2024, so sports technology may take priority over medical clients |
| - | Small team |
| - | Fewer regulated Class II and III device credits than medtech-only firms |
| Flex Health Solutions | |
|---|---|
| + | Large global network of ISO 13485 and FDA-registered sites |
| + | New NPI center supports prototype builds, design verification and production transfer |
| + | Award-winning drug delivery work with Merck KGaA |
| + | Handles sterilization and packaging in-house |
| - | Development work mainly exists to feed programs into Flex factories |
| - | Better for funded programs with a clear path to volume |
| - | Site counts are company-reported and differ across Flex pages |
Who should choose Simbex?
A typical fit: sensor-based wearable for remote monitoring.
Biomechanics and sensor research background applied to wearable health devices. Minimum engagement is not publicly disclosed. Works best with clients in Wearables & remote monitoring, Sports technology, Digital health.
Who should choose Flex Health Solutions?
A typical fit: transferring a verified design into volume production.
Dedicated NPI center and design sites that feed directly into Flex's medical manufacturing network. Minimum engagement is not publicly disclosed. Works best with clients in Drug delivery, Diagnostics & lab devices, Surgical & therapeutic devices.
Decision matrix: Simbex vs Flex Health Solutions
| Your situation | Recommended choice |
|---|---|
| You need full-ownership delivery on a defined project scope | Simbex |
| You need a large dedicated team for an ongoing programme | Check each company's engagement model |
| Your budget is at the lower end | Compare: Simbex (Not disclosed) vs Flex Health Solutions (Not disclosed) |
| You need specialist depth in a specific vertical | Simbex |
| 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: Simbex vs Flex Health Solutions
| Use case | Simbex fit | Flex Health Solutions fit | Winner |
|---|---|---|---|
| Sensor-based wearable for remote monitoring | Strong | Limited | Simbex |
| Biomechanics research study for a device concept | Strong | Limited | Simbex |
| Transferring a verified design into volume production | Limited | Strong | Flex Health Solutions |
| Pre-clinical and design verification builds | Limited | Strong | Flex Health Solutions |
Verdict: Simbex vs Flex Health Solutions
Simbex (3.9/5) is the stronger overall choice for most Medical Device Development projects. Biomechanics and sensor research background applied to wearable health devices.
Flex Health Solutions (3.8/5) is worth a look if you need pre-clinical and design verification builds. If your situation matches that, Flex Health Solutions is a competitive option.
Related comparisons
Simbex vs Flex Health Solutions FAQ
Is Simbex better than Flex Health Solutions?
Simbex (3.9/5) scores higher overall, but "better" depends on your use case. Simbex's strongest advantage: strong sensor and biomechanics research skills. Flex Health Solutions's strongest advantage: large global network of ISO 13485 and FDA-registered sites.
How do Simbex and Flex Health Solutions differ in pricing?
Simbex uses time and materials, fixed project pricing. Flex Health Solutions uses manufacturing supply agreement, npi contract pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.
Which is better for enterprise: Simbex or Flex Health Solutions?
Simbex 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 Simbex and Flex Health Solutions?
Simbex's primary differentiator is: biomechanics and sensor research background applied to wearable health devices. Flex Health Solutions's primary differentiator is: dedicated NPI center and design sites that feed directly into Flex's medical manufacturing network. They also differ in team size (11–100 vs Large (Flex Ltd.)), minimum engagement (Not disclosed vs Not disclosed), and primary industries served (Wearables & remote monitoring, Sports technology vs Drug delivery, Diagnostics & lab devices).
Verify all details directly with each company before making a decision.