A private equity firm was days away from acquiring a software company.
The numbers looked excellent.
Revenue growth exceeded 35%.
Customer retention was strong.
EBITDA margins were healthy.
The market opportunity was attractive.
Financial due diligence was nearly complete.
Then technical due diligence began.
Within two weeks, the acquiring team discovered:
38% of the application relied on unsupported libraries.
Several critical services lacked automated tests.
Security vulnerabilities remained unresolved for more than a year.
Key systems depended on a single engineer planning to leave after acquisition.
Modernization costs were estimated at more than $12 million.
The acquisition did not collapse, but the valuation changed dramatically.
The lesson was simple:
Financial due diligence tells you what a company earned yesterday. Technical due diligence tells you whether the business can continue earning tomorrow.
Increasingly, investors need both.
What Is Financial Due Diligence?
Financial due diligence evaluates the financial health of a business before an investment or acquisition.
Typical areas include:
revenue quality
margins
customer concentration
cash flow
liabilities
debt obligations
accounting practices
The objective is straightforward:
Determine whether the financial story accurately reflects business reality.
Financial due diligence answers questions such as:
Is revenue sustainable?
Are margins healthy?
Are there hidden liabilities?
Is growth organic?
For traditional businesses, this may be sufficient, but software companies are different.
What Is Technical Due Diligence?
Technical due diligence evaluates the health, scalability, security, and maintainability of a company’s software assets.
A software company may derive most of its value from its codebase.
That means investors need answers to questions such as:
Is the software scalable?
How much technical debt exists?
Are there security risks?
Is the architecture sustainable?
Does AI-generated code introduce compliance issues?
This process is commonly referred to as software due diligence.
It has become a critical component of modern mergers and acquisitions.
Financial Due Diligence vs Technical Due Diligence
| Financial Due Diligence | Technical Due Diligence |
|---|---|
| Reviews financial statements | Reviews software assets |
| Measures historical performance | Measures future scalability |
| Identifies financial liabilities | Identifies technical liabilities |
| Focuses on EBITDA and cash flow | Focuses on code quality and risk |
| Evaluates profitability | Evaluates sustainability |
Neither of them replaces the other.
Why Financial Due Diligence Alone Is No Longer Enough
Twenty years ago, technology often supported the business.
Today, software is the business.
For SaaS companies, fintech platforms, AI startups, and digital marketplaces, the codebase is often the largest asset on the balance sheet—even if accounting standards do not recognize it that way.
Ignoring software risk creates blind spots.
Examples include:
hidden technical debt
fragile architecture
security vulnerabilities
software supply chain risks
undocumented dependencies
AI-generated code governance issues
These risks rarely appear in financial reports but eventually show up in operating costs.
The Five Areas Investors Should Examine During Technical Due Diligence
1. Code Quality
Poor code quality increases maintenance costs and slows feature delivery.
Investors should review:
duplication levels
complexity scores
testing coverage
maintainability metrics
This creates an objective view of software codebase health.
2. Technical Debt
Technical debt behaves much like financial debt.
Small shortcuts accumulate.
Eventually they demand repayment.
Indicators include:
outdated frameworks
excessive workarounds
legacy architecture
poor documentation
Technical debt directly affects valuation.
Technical debt is deferred engineering cost disguised as velocity.
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