The New Due Diligence: What Investors Look for Beyond Market Size


Executive Summary

Traditional startup due diligence often focused heavily on market size (TAM, SAM, SOM) and the visionary potential of founders. But investors today recognize that execution risk is as critical as market opportunity. Operational maturity, quality systems, leadership balance, and capital efficiency now weigh heavily in investment decisions.


Ruppert Strategy Partners (RSP) equips startups to meet this expanded lens of due diligence by aligning operations with investor expectations — ensuring that visionary opportunities are backed by scalable, disciplined execution. 

The Challenge

Many founders underestimate the depth of investor diligence beyond market sizing and product vision.

Investors are increasingly focused on:

  • Operational discipline (supply chain, S&OP, cost control).
  • Quality and reliability systems to ensure scalability.
  •  Leadership balance (vision + execution).
  •  Capital efficiency and runway management.

Startups that cannot demonstrate operational readiness risk losing investor confidence even if the market potential is compelling. 

Case Example 1: Semiconductor Startup

Context: A nanotechnology startup attracted significant investor attention due to its breakthrough technology and large market opportunity. However, diligence revealed lack of operational maturity —supply chain partners that could not scale, lack of a GTM ecosystem of partners, no quality/reliability roadmap, and under developed semiconductor processes. 

Action: Stepped in and created an eco-system of suppliers and partners, initiated a reliability/QMS (ISO 09001) roadmap, and launched an IT infrastructure that insured cyber security and end-to-end order fulfillment.

Outcome: The startup secured its next round of funding with strengthened investor confidence, as execution risk reduced. 

Case Example 2: Consumer Hardware Startup

Context: Despite a compelling TAM story, a consumer hardware startup faced skepticism during diligence when investors identified high warranty costs and weak operational controls.

Action: Introduced quality systems, financial forecasting discipline, and leadership coaching to balance vision with operational reality.

Outcome: Investors gained renewed confidence, enabling the startup to close a growth round and scale responsibly. 

Lessons Learned

  • Market size is no longer enough — investors probe deeply into execution readiness.
  • Operational maturity directly affects valuations and deal outcomes.
  • Startups that proactively prepare for diligence by strengthening operations stand out from competitors.
  • Execution readiness builds investor trust as much as visionary technology.

RSP’s Role in Preparing Startups for the New Due Diligence

RSP equips startups to meet evolving investor expectations by:

  • Conducting operational readiness audits.
  • Building QMS, S&OP, and supply chain maturity roadmaps.
  • Coaching founders to articulate operational strategies in investor discussions.
  • Providing interim COO/CTSO leadership during fundraising phases.

Closing Thought

Investors are no longer betting solely on market size or visionary pitches. They want proof that execution risk is being managed. At Ruppert Strategy Partners, we prepare startups to excel under this new due diligence lens — aligning vision with operational maturity to secure investor confidence and long-term growth.