What Investors Get Wrong About Hardware Due Diligence

Hardware due diligence is one of the most consistently underestimated parts of a technology acquisition or investment. Financial and commercial diligence get thorough treatment. Legal review is standard. But when a deal involves a physical product, the technical side of the business — how the product is actually built, what it costs to make, and how mature the supply chain really is — often receives a fraction of the scrutiny it deserves.

That gap is expensive. Here’s what it typically looks like in practice.

The pitch deck says “manufacturing-ready.” The product isn’t.

Manufacturing readiness is a spectrum, not a binary. A company can have a working prototype, a contract manufacturer relationship, and an impressive BOM — and still be 12 to 18 months away from consistent, cost-effective production. Investors who rely on founder-reported readiness without an independent engineering assessment frequently discover post-close that they’ve inherited a product development project, not a scalable manufacturing operation.

The questions that reveal actual readiness aren’t the ones founders expect: Has the product gone through a formal design for manufacturability review? What are the first-pass yield rates at the CM? What happens to unit economics at 5x current volume? The answers to these questions matter more than the demo unit in the data room.

Supply chain risk is rarely stress-tested.

Most hardware companies at the growth stage are running lean supplier strategies — often single-sourced on critical components, with limited visibility into sub-tier suppliers. This works until it doesn’t. In due diligence, the question isn’t whether the supply chain is working today. It’s whether it can absorb a disruption, a component discontinuation, or a demand spike without derailing the business.

A proper hardware due diligence engagement maps supplier concentration, identifies single points of failure, evaluates lead times against demand forecasts, and flags components with end-of-life risk. Most standard diligence processes don’t go this deep.

Technical debt doesn’t show up on the balance sheet.

Every hardware product carries engineering decisions made under time and budget pressure. Some of those decisions are pragmatic and sound. Others create compounding problems — difficult-to-source components locked into the design, regulatory approvals that cover only certain configurations, firmware that’s tightly coupled to hardware that’s about to be discontinued.

Technical debt in hardware is real, material, and very difficult to see without engineering expertise. Investors who discover it post-acquisition often find that their integration or scaling plans require a product redesign they didn’t budget for.

What good hardware due diligence actually looks like

A rigorous hardware due diligence engagement does several things that standard commercial diligence doesn’t:

• Independent review of engineering documentation, not just the summary materials prepared for investors
• Assessment of the contract manufacturer relationship, including capacity, quality systems, and dependency risk
• Component-level supply chain analysis, including alternate source availability and lead time exposure
• Unit economics validation — what it actually costs to build the product today, and what the cost trajectory looks like at scale
• Identification of open regulatory, safety, or certification gaps

The goal isn’t to find reasons to kill a deal. It’s to give investors and acquirers an accurate picture of what they’re buying — including what it will actually take to grow it.

If you’re evaluating a hardware company and want an independent engineering perspective before you close, Glick Group Global’s hardware due diligence practice works directly with investors and acquirers to provide that assessment.