Angel Investor Due Diligence Checklist — 20 Questions Before You Write a Check

Most angel investments are made under conditions of radical uncertainty. You're betting on a team, a market, and a idea — usually before there's enough data to be confident about any of them.

Due diligence at the angel stage isn't about eliminating uncertainty. It's about making sure you're not missing something obvious, and that the risks you're taking are the ones you actually want to take.

Here are 20 questions worth asking before you write a check.

The Founder

The founder is the most important variable at the pre-seed stage. Everything else can change — the market, the product, the business model. The founder is the constant.

1. Why is this founder the right person to solve this specific problem? Domain expertise, lived experience, or an unfair insight — there should be a clear reason this person over anyone else.

2. Has this founder shipped anything before? Not necessarily a company — a product, a project, anything that required them to build something from nothing. Execution history matters more than credentials.

3. How do they handle a hard question they don't know the answer to? Watch for intellectual honesty versus defensiveness. The best founders say "I don't know, here's how I'd find out."

4. What would make them quit? Not a trick question. A founder who has thought seriously about this is more self-aware than one who says "nothing would make me quit." Everyone has a limit — knowing yours is a sign of maturity.

5. Who in their network have they already convinced to work with them? Early team quality is a signal of how compelling the founder is to people who know them well.

The Market

A great founder in a terrible market usually loses. Market size matters — but market dynamics matter more.

6. Is this a market that's growing, shrinking, or being created? Growing markets forgive a lot of mistakes. Shrinking markets punish even good execution. New markets require the most conviction and the most patience.

7. Why now? Most good ideas have been tried before. What has changed — in technology, regulation, behaviour, or infrastructure — that makes this the right moment?

8. Who are the real competitors, including the status quo? "No competition" is almost never true. The status quo — doing nothing, using a spreadsheet, hiring someone — is always a competitor.

9. What would a well-funded incumbent need to do to kill this company? If the answer is "just copy the product," that's a problem. If the answer is "fundamentally change how they operate," that's a moat.

The Product

10. Can you describe what the product does in one sentence without jargon? If the founder can't, that's a signal. If you can't after hearing the pitch, that's a bigger signal.

11. What does the product do today versus what is promised for the future? There should be a clear, honest line between what exists and what's on the roadmap. Founders who blur this line are either confused or selling.

12. Who has actually used it, and what did they say? Not the founder's summary of what users said — ideally, a reference call with a real user. What do they use it for? Would they pay for it? What would make them stop?

Traction and Validation

13. What is the one metric that matters most right now, and what is it? Every early-stage company should have a north star metric. A founder who can't name it — or names five equally important ones — hasn't done the thinking.

14. What growth has happened without paid acquisition? Organic traction — word of mouth, referrals, SEO, community — is a signal of genuine product-market fit. Paid growth at the seed stage is usually just spending money.

15. What have they tried that didn't work? The most honest signal of a founder's learning velocity. What failed, what did they take from it, and how did they change?

The Deal

16. What is the valuation and how was it determined? Valuation at seed is partly art, partly comparable deals, partly founder leverage. Understanding how they arrived at the number tells you how they think about capital.

17. What is the runway from this raise, and what milestones does it fund? There should be a clear answer to "what will be true at the end of this runway that isn't true today." Vague answers here are a red flag.

18. Who else is in the round, and who is leading? Round composition matters. A strong lead investor adds credibility and often helps with the next raise. A round full of small angels with no lead is harder to follow-on from.

19. What are the terms, and are there any unusual clauses? Pro-rata rights, information rights, anti-dilution provisions — understand what you're signing. A standard SAFE or convertible note is straightforward. Non-standard terms deserve scrutiny.

20. If this company returns nothing, will you be okay with having made the bet? The most honest question on this list. Angel investing has a high failure rate. If the answer is no — financially or emotionally — the check size is too large.

How to Use This List

Don't treat this as a scorecard. A company that answers 18 out of 20 questions well is not automatically better than one that answers 12 brilliantly. The questions are prompts for thinking, not a rubric for grading.

The goal is to walk away from your diligence process knowing which risks you're taking and why you've decided they're worth taking. That clarity — more than any individual answer — is what good due diligence produces.

If you're looking for a structured way to track your diligence notes, deal stages, and follow-ups in one place, that's exactly what Nuvett is built for.