Due Diligence for Startups

What Is Due Diligence?

Due diligence (DD) is the systematic investigation that investors undertake before committing capital to a startup. Once a term sheet has been signed (or in some cases, before a term sheet is issued), the investor's team — often including lawyers, accountants, technical specialists, and market analysts — examines every significant aspect of your business to verify claims made during the pitch process and identify undisclosed risks.

For founders, due diligence can feel invasive and time-consuming. For investors, it is the essential process of converting a compelling pitch into a defensible investment decision. Understanding what investors look for during DD — and preparing for it — can dramatically reduce the time from term sheet to closing.

What Investors Examine During Due Diligence

Financial Due Diligence Investors will review your historical financials (profit and loss, balance sheet, cash flow statements), current burn rate and runway, revenue recognition policies, customer contracts and renewal rates, and unit economics (CAC, LTV, gross margin, payback period). Any discrepancy between numbers cited in your pitch and actual financial statements will raise serious concerns.

Legal Due Diligence This covers corporate structure and incorporation documents, cap table verification, intellectual property ownership (all code, trademarks, patents assigned to the company, not to individual founders), employment agreements and contractor agreements, customer and vendor contracts (especially any unusual exclusivity or liability clauses), and any pending or threatened litigation.

A common red flag: early-stage startups where founders have not formally assigned their intellectual property to the company. If a founder writes code as an individual before incorporation, and there is no IP assignment agreement, the company technically does not own its own product.

Technical Due Diligence For technology companies, investors (either directly or via a technical advisor) will assess code quality and architecture, scalability and security practices, technical debt, third-party dependencies and licensing, and data management practices. At Series A and beyond, some investors will conduct formal technical reviews lasting several days.

Market and Customer Due Diligence Investors increasingly conduct independent customer reference checks — speaking directly with your paying customers to validate retention, satisfaction, and willingness to expand. They will also research your competitive landscape, total addressable market, and the reasonableness of your market sizing claims. Inflated TAM numbers are one of the most common DD red flags.

Team Due Diligence Background checks on founders and key executives, verification of claimed credentials and previous employment, and reference calls with former colleagues and managers. Investors are not just checking for dishonesty — they are assessing whether the team has the skills and character to execute over a multi-year journey.

Preparing Your Data Room

A data room is a secure, organised digital repository of all documents an investor will need during due diligence. Having a clean, complete data room ready before a term sheet signals professionalism and accelerates closing.

A well-organised startup data room typically includes:

Corporate Documents: Certificate of Incorporation, Shareholder Agreement, Board meeting minutes, all previous financing documents (SAFEs, notes, share certificates)

Financial Documents: Last 24 months of financial statements, current management accounts, financial projections (3 years), bank statements, cap table (fully updated)

Legal Documents: All IP assignment agreements, employment and contractor agreements, customer contracts (major accounts), supplier agreements, regulatory licences

Product/Technical: Product roadmap, architecture overview, security audit reports if available, key metrics dashboard

Market: TAM analysis, competitive landscape, customer research and interview notes

Common Due Diligence Red Flags

• Cap table inconsistencies or undisclosed equity holders
• Intellectual property not assigned to the company
• Revenue numbers that cannot be reconciled with bank statements
• Customer churn higher than disclosed during pitching
• Personal expenses run through the company
• Key person dependency — critical knowledge or relationships held by one individual with no succession plan
• Unresolved co-founder disputes or departures without proper equity treatment

Timeline and Process

Due diligence for a Seed round typically takes 2–6 weeks from term sheet to closing. Series A DD can take 6–12 weeks, particularly if it involves technical reviews, customer reference calls, and legal structuring across multiple jurisdictions. Founders who are well prepared — with a complete data room and responsive communications — consistently close faster.