April 10, 2026
DDQ (Due Diligence Questionnaire) for SaaS Vendors: A Complete Guide
What a DDQ is, how it differs from a standard security questionnaire, and how B2B SaaS vendors should prepare and respond to due diligence questionnaire requests.
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A DDQ (Due Diligence Questionnaire) is a comprehensive assessment document sent by buyers — particularly in financial services, insurance, and private equity — to evaluate a vendor's operational, financial, legal, and security posture before engagement.
How a DDQ differs from a standard security questionnaire
A standard vendor security questionnaire focuses primarily on information security controls. A DDQ is broader:
| Section | Standard VSQ | DDQ |
|---|---|---|
| Information security | ✅ | ✅ |
| Data privacy & GDPR | ✅ | ✅ |
| Business continuity | ✅ | ✅ |
| Financial stability | ❌ | ✅ |
| Legal & corporate structure | ❌ | ✅ |
| Insurance coverage | ❌ | ✅ |
| Key person risk | ❌ | ✅ |
| ESG / sustainability | ❌ | Sometimes |
Financial services firms — banks, asset managers, insurance companies — often send the most detailed DDQs because they are required to under DORA (Digital Operational Resilience Act in the EU), FCA guidelines (UK), and SEC regulations (US).
What to prepare for a DDQ
Security section: Same preparation as any vendor questionnaire — policy docs, SOC 2, DPA, subprocessors list, pen test summary.
Legal & corporate:
- Certificate of incorporation
- Registered address and corporate structure
- Named legal counsel contact
Financial:
- Most recent audited financial statements (or summary for private companies)
- Confirmation of cyber liability insurance coverage and limits
- Business interruption insurance details
Key person and continuity:
- Succession plan for critical technical roles
- Documented DR and BCP with tested RTO/RPO
The security sections are automatable
While the financial and legal sections of a DDQ require manual input, the security sections map closely to standard questionnaire themes. SecureFlow can draft answers to the security, data privacy, and business continuity sections of a DDQ from your uploaded documents.
Upload your security policy, DPA, BCG plan, and subprocessors list — then import the DDQ as a CSV. AI drafts the rows it can answer; you fill in the rest manually.
Start free at secureflow.tech.
Not legal or financial advice. Have qualified counsel review DDQ responses.