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2026-04-05 · 10 min read

The Only Startup Due Diligence Checklist You'll Need in 2026

A comprehensive due diligence checklist for startup investors covering product, team, market, financials, and legal verification. Save this guide for every deal you evaluate.

I used to spend 8-10 hours on due diligence for every deal. Now I spend 45 minutes on the first pass and 2-4 hours on the second.

The difference was building a systematic checklist that covers every dimension without falling down rabbit holes.

Here's the checklist I use:

Product Diligence

1. Is there a real product?

  • Working demo or beta access
  • Signed customers (revenue or pilot)
  • Not just an "MVP" with fake users

2. How defensible is the product?

  • Technical barriers: proprietary tech, data moat, unique algorithms
  • UX barriers: network effects, habit, integration
  • Regulatory barriers: licenses, patents, certifications

3. What does the user journey look like?

  • First-use experience
  • Retention curve (day 1, day 7, day 30)
  • Customer support load vs. usage

Team Diligence

4. Are the founders telling the truth?

  • Employment history verification
  • Education verification
  • Reference checks (personal and professional)

5. Are they the right team for this market?

  • Domain expertise validated
  • Previous operator experience in similar company
  • Founder-market fit for this stage

6. How do they make decisions?

  • Board meeting observation
  • Response to hard questions
  • Willingness to admit what they don't know

Market Diligence

7. Is the market real?

  • Top-down TAM validation
  • Bottom-up customer count from actual data
  • Customer interviews (at least 5)

8. What's the competitive dynamic?

  • Direct competitors (3-5)
  • Indirect competitors
  • Why now? (Why is this the right time to start this?)

9. What's the channel to market?

  • How do you acquire customers?
  • What's the effective cost?
  • Is there a scalable playbook or is it all founder-dependent?

Financial Diligence

10. Is the unit economics real?

  • CAC (customer acquisition cost) by channel
  • LTV (lifetime value) from actual data
  • Payback period
  • Gross margin by product

11. What's the path to profitability?

  • Cash burn vs. runway
  • Path to unit economics breakeven
  • Financing history and burn rate

12. Is there hidden debt?

  • Convertible notes outstanding
  • SAFE agreements
  • Debt from investors or third parties

Legal Diligence

13. Corporate structure

  • Entity formation and good standing
  • Ownership cap table vs. actual
  • State of incorporation and why

14. IP ownership

  • Are all founders on IP assignment agreements?
  • Is there proprietary IP or just know-how?
  • Are there open-source components that create obligations?

15. Legal conflicts

  • Outstanding litigation
  • Regulatory issues
  • Key person employment agreements (non-competes, IP)

The Due Diligence Process

  1. First pass (45 min): Cover everything at a surface level. Flag the 2-3 things that need deep-dive.
  2. Second pass (2-4 hours): Deep-dive on the flagged areas. Data calls, reference checks, document review.
  3. Decision: Pass, pass with conditions, or pass and lead.

Soloanalyst's Role

Soloanalyst automates the first pass across multiple data dimensions: team history, market signals, competitive landscape, and financial pattern matching.

It won't tell you if the deal is good. It will tell you if the founder is lying.

Run this framework on your next inbound deal.

SoloAnalyst turns public signals into a fast, structured memo before your first founder call.