Design Firms, CDMOs, and CMOs, which one is right for your Medical Device Startup?

Criteria	Design Firms	CDMO	CMO
Primary Focus	Concept, design, and engineering	End-to-end services from design through manufacturing	Manufacturing from established designs
Development Stage Involvement	Early to mid-development, might be able to produce DV clinical device, verify	Early development through commercialization	Late development and commercialization
Ideal Funding Stage for Engagement	Pre-seed to Series A	Series A and beyond	Post-Series A
Typical Project Entry Point	Concept or early prototype	Concept to detailed design	Design transfer or manufacturing
Manufacturing Capabilities	Limited or none	Moderate to comprehensive	Comprehensive and specialized
Regulatory Support	Design controls and documentation	Comprehensive regulatory pathway support	Manufacturing quality systems
Risk of Design-Manufacturing Disconnect	High	Low	Medium to high
Flexibility to Change Approach	High	Low to medium	Medium
Typical Minimum Project Size	Lower	Higher	Medium
Timeline Impact	Fast design, but transition required	Consistent timeline with fewer transitions	Fast manufacturing ramp but requires complete design and knowledge transfer
Control Over Process	High for design, low for manufacturing	Medium across all processes	Low for design, high for manufacturing
Support for Design Changes	Excellent for design iterations	Good across development and manufacturing	Limited to manufacturing changes
Scalability	Limited by manufacturing transition	Moderate to good	Excellent
Typical Quality Systems	ISO 13485 design focused	ISO 13485 comprehensive	ISO 13485 manufacturing focused
In-house Prototyping	Often available	Usually available	Limited to production validation
Supply Chain Management	Limited	Moderate to comprehensive	Comprehensive
Advantages of each	High technical expertise, fast design/test iterations	Good design and manufacturing integration, vertically integrated	Easy to scale, expertise in efficiency, and robust process control and supply chain.
Watch out	Design for manufacturability, unit cost, design transfer cost, and duration	A balanced approach might incur overhead upfront, and slower progress	Might request design changes, need sustaining and reg support to capitalize on efficiency.
Best for Startups When	Need to move fast towards a milestone for funding before DV	Higher volume and cost-sensitive product, one stop shop	Design is complete and manufacturing scale and cost efficiency is needed
Internal team Expertise Required	Manufacturing and regulatory expertise, Design transfer	Project management	Design sustaining, Change and DV when needed. Design transfer and quality oversight