The short answer
Due diligence is the investigation an investor does before committing money: confirming what you've told them about your team, market, product, traction, finances and legal setup. At pre-seed it can be a few calls and a document review; at Series A it's usually far deeper.
- Diligence confirms what your pitch claims.
- Early-stage diligence focuses on team, market and early traction.
- Legal cleanliness (cap table, IP, Form D) matters at every stage.
- A ready data room shortens diligence and signals competence.
What investors usually check
| Area | Typical questions |
|---|---|
| Team | References, relevant experience, founder commitment and vesting |
| Market | Size, timing, competitors and why now |
| Product and traction | Customer calls, usage data, revenue, pipeline |
| Finances | Burn, runway, model assumptions, use of funds |
| Legal | Incorporation, cap table, IP assignment, prior SAFEs, Form D filings |
Worked example (hypothetical)
A healthcare founder in Columbus gets a yes in principle from a regional seed fund. Over two weeks, the fund calls three customers, reviews her cap table and IP assignments, checks her revenue against bank statements and asks two former colleagues about her. One gap appears: an early contractor never signed an IP assignment. She fixes it in a week, and the round closes.
Why it matters to a pre-seed or seed founder
Diligence is where rounds stall. Prepare before you pitch: a clean data room, signed IP agreements, a current cap table and records of each Form D. Do your own diligence too: ask each investor for founder references. Use our due diligence questions and data room checklist.
Frequently asked questions
How long does seed diligence take?
It varies with the investor and how ready you are. A prepared data room usually shortens it.
Do angels do diligence?
Many do lighter diligence; angel groups often run a structured process with a diligence team.
Should I check investors too?
Yes. Ask for references from founders they've backed, including ones whose companies struggled.