Choosing a product design firm comes down to verifying three things before you sign: that the firm has genuinely shipped products like yours (not just rendered them), that its engineering depth covers every discipline your product needs, and that the contract gives you ownership of all IP and deliverables. Everything else — price, timeline, chemistry — matters only after those three check out. Here is how to run the evaluation like someone who has been burned before, so you do not have to be.

First, know what you are actually buying

"Product design" is sold by very different animals. Industrial design studios excel at form, ergonomics, and user experience — the discipline covered in our industrial design pillar. Engineering firms carry products through mechanics, electronics, and firmware to something manufacturable. Full-service product engineering companies combine both and add manufacturing setup. A beautiful concept that cannot be built is worthless; an ugly product that works is merely unfinished. Match the firm's center of gravity to where your risk actually lives — for most physical products, the hard risk is engineering and manufacturability, not styling.

The questions that separate real firms from portfolio theater

About track record

  • "Show me products you designed that are being manufactured and sold today." Renders and award concepts do not count; shipped products do.
  • "Which of these are similar to mine in technology and volume?" A firm brilliant at molded consumer gadgets may be lost on a medical device or an industrial machine.
  • "Can I speak with two past clients?" The call to make: ask those clients about budget overruns and how the firm handled the moment something failed.

About engineering depth

  • "Who exactly will work on my project, and what have they built?" Some firms sell senior faces and staff juniors.
  • "Do you handle electronics and firmware in-house or subcontract?" Neither answer is wrong, but hidden subcontracting means hidden markup and slower iteration — relevant for anything with a PCB, covered in electronics development.
  • "How do you design for manufacturing, and at what stage?" The right answer involves DFM from early concept work and named familiarity with real processes from the manufacturing technologies your product will use.

About the business terms

  • "Do I own all IP, CAD files, and source files — including work-in-progress?" The only acceptable answer is yes, in writing. Firms that hold your native CAD hostage own your product in practice.
  • "Fixed price per phase or time and materials?" Phased fixed pricing with defined deliverables protects both sides; open-ended hourly on a vague scope protects only the firm.
  • "What happens when we discover the design needs to change?" Every real project changes. You want a firm with a sane change process, not one that weaponizes change orders.

Red flags that should end the conversation

  • Guaranteed outcomes — "your product will be store-ready in 90 days" — before any technical analysis.
  • Reluctance to sign an NDA or vagueness about IP ownership.
  • A quote dramatically below all others: it usually means the scope was not understood, and the difference returns as change orders.
  • No questions about your users, volumes, or budget. A firm that does not interrogate your goals is selling hours, not outcomes.
  • Pressure to commit to the full program up front rather than starting with a scoped first phase.

Comparing quotes without fooling yourself

Quotes only compare if the scopes match, so force them onto the same structure: what phases, what deliverables per phase, how many prototype iterations included, who pays for parts and testing, and what happens at handoff to manufacturing. Typical engagements for a complete product run from tens of thousands of dollars for simple mechanical products into the low hundreds of thousands for connected devices — our guide to product development consultant rates breaks down what drives the spread, and the product development services pillar maps the engagement models. A sensible de-risking move: hire two finalists for a small paid feasibility phase and pick the one whose work you would bet the product on. The overall bar for the process is set out in the new product development pillar.

Talk to us — and ask us these exact questions

Projects House is an engineering firm that takes products from idea through design, prototyping, and manufacturing setup, and we are happy to be interviewed against every question on this list — shipped products, client references, IP terms, and all. Reach out through the contact form and put us to the test.