Backing a tech startup is one of the most complex investment decisions a private investor can make. You're not just assessing a market opportunity or a founding team, you're betting that a piece of software, built by a small group of people under pressure, will do what they say it does and hold together as the company scales.
Most angel investors do this without any technical due diligence at all.
That's not a criticism. The existing options are genuinely bad. Traditional DD firms charge $8,000–$20,000 and take three to four weeks, far too slow and expensive for a $50,000 angel cheque. So the standard approach becomes a 90-minute call with the CTO and a hope that your instincts are right.
The problem is that the person you're relying on for your technical assessment has the most obvious conflict of interest in the room.
What the Numbers Actually Show
Before we get to the individual risk areas, it's worth sitting with the baseline numbers.
Harvard Business School research across 2,000 venture-backed startups found that 75% never return capital to investors, and 30–40% result in total loss. Sixty-three per cent of tech startups fail within five years, a rate significantly higher than the 49% all-industry average.
These are not primarily market failures. The CB Insights analysis of 483 startup post-mortems found that no market need accounts for 42% of failures, but the technical foundations that can't support growth, attract follow-on investment, or survive a Series A due diligence process account for a substantial portion of the rest.
The question investors rarely ask is: how many of those failures were detectable at the point of initial investment?
IP Ownership: The Most Common Deal-Stopper
IP ownership issues don't announce themselves. They surface quietly, usually when a Series A investor commissions a proper audit, or when a contractor who wrote a critical module three years ago realises they never signed anything.
According to Bloomberg Law, buy-side lawyers in startup diligence regularly encounter companies that haven't obtained IP assignment agreements from all the developers involved in building the product. Sometimes the agreements exist but are technically defective, missing the kind of active assignment language that holds up under legal scrutiny.
The consequences are material. As Traverse Legal puts it plainly: a single missing agreement can compromise the company's claim to its entire product. Institutional investors won't accept ambiguity in the chain of title. If gaps are found, an investor can demand costly remedial steps, reduce the valuation, or abandon the deal.
Making it retroactively worse: contractors who were never asked to sign an IP assignment can refuse outright or demand payment or equity to do so after the fact. They now have unexpected leverage over your investment timeline.
A real-world illustration: the game Project Genom was removed from Steam after one of its developers filed a DMCA claim for their intellectual property being used in the product, a direct consequence of IP ownership that was never properly formalised. The same dynamic plays out in commercial software startups every time an investor commissions a thorough audit at Series A.
Security Posture: The Numbers Are Alarming
Synopsys audited more than 1,000 commercial codebases across 17 industries for its 2024 Open Source Security and Risk Analysis (OSSRA) report. The findings are stark.
74% of commercial codebases contained high-risk open source vulnerabilities, a 54% increase on the previous year. 91% contained components that were ten or more versions out of date. Nearly half contained components with no active development at all.
These aren't exotic attack vectors. They're the kind of known vulnerabilities that attackers exploit routinely, against targets of exactly the size and profile of a seed-stage startup.
The consequences of a breach at an early stage are disproportionate. IBM's research puts the global average cost of a data breach at US$4.44 million in 2025. For a startup with 12 months of runway and a customer base it's actively trying to grow, that's not just a financial event, it's existential.
And it's not only portfolio companies that face the risk. In February 2025, major venture capital firm Insight Partners disclosed a ransomware attack that compromised sensitive financial and personal data belonging to more than 12,000 individuals. The attackers had been inside Insight Partners' systems for nearly three months before detection, gaining access through sophisticated social engineering. The breach affected employees, partners, and portfolio companies, a reminder that poor security posture at any point in the investment chain creates exposure across it.
Key Person Risk: The Bus Factor Nobody Talks About
There's a concept in software development called the "bus factor." It answers a morbid but practical question: how many people would need to be hit by a bus before a system became unmaintainable?
For a significant number of early-stage startups, the answer is one. One engineer who wrote most of the codebase, holds the architecture in their head, and has no employment contract tying them to the company.
Human Renaissance's 2025 M&A benchmarking research, drawn from over 1,000 commercial codebase audits, found that 70% of deal failures are linked to technical issues, and a key driver is the departure of the one person who understood how the legacy code worked. Their diligence work uncovered a deal where a $15 million ARR target looked sound until a deep code audit revealed $4 million in immediate re-platforming costs post-close, a 4x EBITDA hit that came entirely from undiscovered technical debt.
That $4 million wasn't visible from the pitch deck. It wasn't going to surface in a 90-minute CTO interview. It required someone who knew what to look for.
Architecture Scalability: When Your Money Funds the Rebuild
A related problem is architecture that works at current scale but requires a complete rebuild to support the growth that justifies the investment.
40% of startups lose their first customers due to performance issues, often because the technical foundations couldn't handle the load that came with early traction. By the time this becomes visible to investors, the money has already been deployed.
A system that handles 500 users elegantly but requires a full re-architecture to reach 50,000 is not a growth-stage company. It's a rebuild project wearing a growth-stage company's clothes.
The Case for Independent Assessment
None of this is meant to suggest that most startup founders are dishonest. The more common scenario is that a small team has been moving fast, under pressure, with limited resources, and nobody with the right background has ever looked at what they've built and given them an honest assessment.
A technically articulate CTO can present a compelling and entirely genuine picture of a system that has material problems they don't fully see themselves. That's not deception. It's the inevitable result of building in conditions where speed is valued over rigour.
The CTO conversation tells you about culture and confidence. It doesn't give you an independent view of the technology.
What does: a structured assessment by someone with enough experience to know the difference between a well-constructed story and a well-constructed system.
What DavTek Offers
We conduct technical risk assessments for angel investors, emerging fund managers, and accelerators. In three to five business days, we deliver a plain-English report covering the areas that matter most at seed and early Series A: IP ownership, key-person dependency, security posture, architecture scalability, development process health, data compliance, AI strategy, and vendor risk.
Each finding is written for a non-technical reader, not "the application lacks a comprehensive automated testing framework" but "every code change is deployed manually with no safety net, which means problems are discovered when customers complain, not before."
Our background is 20+ years in cloud engineering across banking, healthcare, and government. These are environments where the cost of getting the technical assessment wrong is measured in regulatory fines and failed audits, not just uncomfortable board meetings. That experience doesn't stop being relevant when the client is an angel investor rather than a regulator.
A Dipstick assessment - covering the three most critical domains, costs as little as AUD $2,500 (ex. GST) and is delivered within 72 hours. A Full Assessment across all eight domains is available with a five-business-day turnaround. For larger deals or Series A preparation, a Deep Dive is also available.
We also work with accelerators on cohort arrangements, and with founders who want to find their own gaps before investors do.
If you're evaluating a deal right now, or want to understand what the assessment covers before your next one, get in touch.
This article is for informational purposes only and does not constitute financial or investment advice. DavTek's assessments are technical in scope. Always conduct your own commercial, legal, and financial due diligence before making any investment decision.