Security Questions to Ask a Software Vendor for Modern Businesses

What you are really deciding when you ask software vendors security questions

When you buy software today, you are not just choosing features and price. You are choosing to trust another company with your customers, your employees, and sometimes your core intellectual property.

That trust should be earned, not assumed. Asking the right security questions helps you answer three business-critical decisions:

• Can we safely use this software at all? Some tools are fundamentally misaligned with your risk, compliance, or data sensitivity.
• Where should we use it, and for which data? You may decide to limit a tool to lower-risk use cases.
• What extra controls or contract terms do we need? This includes technical safeguards, user processes, and legal protections.

This guide gives founders, business owners, CTOs, operations leaders, marketing leaders, and procurement teams a practical checklist of what security questions to ask a software vendor for modern businesses—and how to interpret the answers.

Step 1: Classify vendor risk before you dive into questions

Not every vendor needs a 200-question security questionnaire. The depth of questioning should match the risk. Classifying risk first helps you decide how far to go.

How to classify vendor risk in 10 minutes

Ask internally:

• What business process will this vendor support? (e.g., CRM, finance, HR, marketing analytics, collaboration)
• What kind of data will they handle?
  • Basic business data only (e.g., product catalogs, non-sensitive content)
  • Customer or prospect data (names, emails, behavior)
  • Employee data (HR records, performance, payroll)
  • Financial data (invoices, banking information)
  • Highly sensitive data (health data, minors’ data, legal or confidential projects)
• What happens to our business if this vendor is down for 1–3 days?
  • Minor inconvenience
  • Revenue impact but survivable
  • Major operational and reputational damage

Based on this, set a simple risk tier:

• Low risk: Non-sensitive data only, no material business impact. Use a light question set.
• Medium risk: Customer or employee data, or moderate business impact. Use a structured checklist and seek written answers.
• High risk: Sensitive data, regulated data, or critical operations. Use full questioning, request documentation, and involve security/legal.

Make this risk tier explicit in your procurement notes so everyone understands why you are asking more (or fewer) questions.

Step 2: Governance and accountability – who owns security at the vendor?

Strong technical controls without clear ownership often fail in practice. Start by understanding how the vendor organizes security internally.

Key questions to ask

• Who is accountable for security at your organization?
  • Is there a named security lead or team?
• Do you follow a formal security framework or standard?
  • For example, ISO/IEC 27001 or alignment with the NIST Cybersecurity Framework.
• Do you have a documented information security policy?
  • Can you share a high-level overview with us?
• How often do you review and update your security policies and procedures?

What good answers look like

Stronger vendors typically:

• Can name a specific role or team responsible for security.
• Align with established frameworks such as ISO 27001 or at least adopt structured policies inspired by standards like the NIST Cybersecurity Framework.
• Review policies at least annually and after major incidents or changes.

Red flags

• "Security is everyone’s job" with no clear accountable owner.
• No formal policies, just "best efforts" or "industry standard" claims with no detail.
• Security is treated purely as an IT task, not a management responsibility.

Step 3: Data handling – what data, where it lives, and how it flows

Before you discuss controls, you need clarity on what data the vendor will hold and how it is processed. This is critical for privacy, compliance, and reputational risk.

Essential data protection questions

• What categories of data will you store or process on our behalf?
  • Personal data (customers, employees, prospects)?
  • Payment-related or financial data?
  • Any special or sensitive categories of data, such as health-related information?
• Where is our data stored and processed?
  • Which countries or regions?
  • Are there backups in other regions?
• Do you use any subcontractors or subprocessors that will access our data?
  • Can you share a list and the countries where they operate?
  • How do you vet and manage these subprocessors?
• How long do you retain our data?
  • Is retention configurable by us?
• Can we export our data in a usable format at any time?
  • Which formats are supported?

Why this matters commercially

Clear answers to these questions help you:

• Check compliance with privacy laws that apply to you (for example, GDPR in the EU or other local laws).
• Plan for vendor portability—being able to move data out if you switch tools.
• Understand cross-border data transfer risks and customer expectations around data locality.

Red flags

• Unclear or changing data locations without customer notice.
• No documented list of subprocessors or unwillingness to share one.
• Non-exportable data or proprietary formats that make it hard to leave.

Step 4: Encryption and technical safeguards – how your data is protected

Encryption and technical safeguards are the backbone of modern security. You should not need to be a cryptography expert, but you need to know the basics.

Core encryption questions

• Do you encrypt data in transit?
  • Do you enforce secure protocols for web and API access?
• Do you encrypt data at rest?
  • Is all customer data stored in encrypted storage systems?
• Who manages encryption keys?
  • Do you manage keys centrally, or can customers manage their own keys (if relevant)?
• How do you segregate customer data in multi-tenant environments?
  • Logical separation (for example, per-tenant identifiers) or separate databases?

Other technical controls to ask about

• Logging and monitoring:
  • Do you log security-relevant events (logins, admin actions, configuration changes)?
  • How long are logs retained?
• Secure development practices:
  • Do you perform code review for security issues?
  • Do you use automated security testing (for example, dependency scanning, static analysis)?
• Configuration security:
  • Do you provide security-relevant configuration options (password policies, session timeouts, IP allowlists)?

Red flags

• No clear statement about encryption at rest and in transit.
• No or minimal logging for administrative actions.
• Security testing only after releases, or not at all.

Step 5: Identity, access, and user management – who can see what

Many breaches happen not because of a technical flaw, but because too many people had too much access for too long. That includes both your users and the vendor’s staff.

Questions about your users’ access

• What authentication options do you support?
  • Username and password only, or also Single Sign-On (SSO)?
  • Which identity providers are supported?
• Do you support Multi-Factor Authentication (MFA)?
  • Can we enforce MFA for our users?
• Do you provide role-based access control (RBAC)?
  • Can we define roles and limit what different user types can do and see?
• How do you handle account deprovisioning?
  • Can we easily disable users immediately when they leave our company?

Questions about the vendor’s internal access

• Which of your employees can access our data and under what conditions?
  • Is access granted by default, or based on specific need?
• How do you control and audit privileged (admin) access?
• How do you vet employees who may have access to customer data?
  • Background checks, confidentiality agreements, security training?
• Do you log and review access to customer data?

Red flags

• No MFA support or inability to enforce it for your users.
• No role-based permissions, only "all or nothing" access.
• Vendor employees have broad, permanent access to all customer data.

Step 6: Operations, reliability, and continuity – staying secure while staying online

Security and reliability are tightly connected. A secure system that frequently fails, or a stable system that is insecure, both create business risk. Modern businesses need to understand how vendors manage uptime, backup, and recovery.

Questions about uptime and availability

• What is your typical uptime performance and do you publish a status page?
• Do you have a documented disaster recovery plan?
• What recovery time objective (RTO) and recovery point objective (RPO) do you target?
  • In plain terms: how long could you be down and how much data could we lose?

Questions about backup and recovery

• How often are backups taken and how long are they retained?
• Where are backups stored and are they encrypted?
• How often do you test your restore procedures?

Why this matters

These answers determine whether the vendor matches your tolerance for downtime and data loss. For core revenue systems or regulated workloads, you may need tighter RTO/RPO and clearer commitments.

Red flags

• No clear disaster recovery plan.
• Backups not encrypted or stored in the same fault domain as production.
• Restore procedures rarely or never tested.

Step 7: Vulnerability management and incident response – when things go wrong

No vendor can guarantee zero incidents. What matters is how quickly and transparently they detect, respond, and communicate.

Vulnerability management questions

• How do you identify security vulnerabilities in your systems?
  • Automated scans, third-party assessments, penetration testing?
• How quickly do you address critical vulnerabilities once identified?
• Do you have a process for receiving and handling vulnerability reports from external researchers?

Incident response questions

• Do you have a documented incident response plan?
  • Can you share an overview of the steps?
• If there is a security incident affecting our data, how and when will you notify us?
  • What is your target notification timeframe after confirmed impact?
• What information will you provide during an incident?
  • Scope, timeline, impact, remediation actions?
• Will you support our own regulatory or customer notifications if required?

Red flags

• No formal incident response plan, just "we will investigate as needed".
• No defined process for handling reported vulnerabilities.
• Unwillingness to commit to timely notification of incidents affecting your data.

Step 8: Compliance, privacy, and regulatory alignment

Your obligations as a business do not disappear when you move to the cloud. They extend to your vendors. You must understand how the vendor supports (or complicates) your compliance and privacy requirements.

Compliance-related questions

• Do you hold any relevant security or privacy certifications or attestations?
  • For example, ISO 27001, SOC 2, or similar.
• How do you support customers with their obligations under applicable laws?
  • For example, data subject access, correction, or deletion requests where relevant.
• Do you act as a data processor on our behalf and can you provide a Data Processing Agreement (DPA) where required?
• How do you handle cross-border data transfers where those are regulated?

What to look for

Well-prepared vendors should:

• Have clear documentation about their role as controller or processor, depending on the service.
• Offer standardized DPAs with clauses aligned to common regulatory expectations where applicable.
• Provide a structured process for privacy-related requests (for example, access or deletion).

Red flags

• No awareness of privacy and regulatory obligations that apply to their customers.
• Vague or contradictory statements about their role and responsibilities.
• No DPA or reluctance to discuss processor relationships when they clearly process personal data.

Step 9: Contracts, liability, and audit rights

Commercial terms are where security and risk become real. What vendors promise verbally must be backed by contracts. Work closely with legal or procurement where possible.

Contractual questions to ask

• Where in the contract or DPA are your security commitments documented?
• What are your responsibilities versus ours in protecting data?
• What limitations of liability apply if there is a security breach that affects us?
• Do we have any right to receive audit summaries or third-party assessment reports?
• How will you inform us of material changes to your security practices or subprocessors?

Offboarding and data deletion

• What happens to our data when we terminate the contract?
  • How long is it retained and for what purposes?
• Can we request deletion of our data and receive written confirmation?
• Can you provide a certificate or statement of destruction after deletion?

Red flags

• Security promises only in sales materials, not in the contract.
• Very low liability caps that would not cover realistic breach-related costs.
• No clear offboarding or deletion commitments.

Step 10: Practical vendor security question checklist by risk tier

Use this condensed checklist to adapt depth based on your earlier risk classification.

For low-risk vendors

• What data will you store or process for us?
• Do you encrypt data in transit and at rest?
• How do you manage user access and authentication?
• Do you back up customer data and test restores?
• What is your process for handling security incidents affecting customers?

For medium-risk vendors

• All low-risk questions, plus:
• Who is responsible for security and what framework or policies do you use?
• Where is our data stored and which subprocessors can access it?
• Do you support MFA and RBAC for our users?
• How do you manage vulnerabilities and apply security patches?
• Do you have a DPA and privacy documentation aligned with relevant laws?
• What are your stated RTO/RPO targets and typical uptime performance?

For high-risk or critical vendors

• All medium-risk questions, plus:
• Can you share independent audit or certification summaries (for example, ISO 27001, SOC 2, or similar)?
• How do you segregate data between customers in your environment?
• How do you control and log internal employee access to our data?
• What is your detailed incident notification process and timeline?
• What additional security features can we enable (IP allowlists, customer-managed keys where applicable, advanced logging)?
• Can contract terms be adjusted to reflect our regulatory or risk requirements?

Common mistakes modern businesses make when assessing vendor security

Even experienced teams fall into predictable traps. Awareness of these mistakes can save you time and reduce risk.

1. Treating security as an afterthought at the end of procurement

Security questions arrive after price and features are negotiated, creating pressure to accept higher risk to avoid re-running the process. Instead, introduce core security questions early in vendor shortlisting.

2. Asking huge generic questionnaires without understanding what matters

Long, unfocused questionnaires waste everyone’s time and obscure the real issues. Start from your actual data and business risk, then tailor your questions accordingly.

3. Accepting verbal reassurances instead of written commitments

Sales teams may promise strong security in meetings, but contracts and policies are what guide behavior when problems occur. Always request written answers and documentation for important points.

4. Failing to connect vendor security to your own obligations

Even if a vendor is secure in general, they may not meet your specific legal or regulatory needs. Map their answers to your requirements—industry regulations, privacy laws, contractual promises to your customers.

5. Not re-evaluating vendors over time

Vendors change their architecture, subprocessors, or business focus. A one-time assessment is not enough for critical or high-risk vendors. Build periodic reviews into your renewal process.

When to bring in technical, security, or legal help

You do not need to be a security expert to ask good questions, but there are clear points where you should not decide alone.

Bring in technical or security experts when:

• The vendor will handle highly sensitive or regulated data (for example, health records, financial account details, minors’ data, or trade secrets).
• The vendor is core to your operations (for example, core banking, main e-commerce platform, HR and payroll, core learning or patient systems).
• You receive technically complex answers that you do not fully understand (for example, around encryption, key management, logging).
• You see partial red flags but are unsure how serious they are.

Bring in legal or compliance support when:

• The vendor processes personal data and you operate in regulated jurisdictions or industries.
• There are disputes about liability, audit rights, or data ownership.
• The DPA or contract includes complex or unfamiliar clauses about data transfers or processing.

If you do not have in-house expertise, consider using external advisors or partners who specialize in vendor risk and security to perform targeted reviews rather than trying to build everything from scratch.

How to embed vendor security questions into your business processes

To make this sustainable, you need more than one-off questionnaires. Embed security evaluation into your standard way of buying and renewing software.

1. Add a risk tier question to all software requests

Whenever someone proposes a new tool, ask:

• What data will it handle?
• What happens if it is down?
• How many users and which departments will rely on it?

This single step routes low-risk tools through a faster path and ensures high-risk tools get proper scrutiny.

2. Standardize a core question set

Create a short core list of security and privacy basics that every vendor must answer. For medium- and high-risk vendors, extend with the more detailed questions from this guide.

3. Store vendor answers centrally

Keep vendor security answers, policies, and contracts in a shared location (such as a vendor management or documentation system). This allows you to:

• Avoid re-asking basic questions each year.
• Track changes over time.
• Quickly answer customer or auditor questions about your third-party risk approach.

4. Link security evaluation to renewals

At renewal time, quickly re-validate key items:

• Certifications or frameworks still in place.
• Any major security incidents since last review.
• Changes in architecture, hosting, or subprocessors.
• Your own growing data volume and risk with the vendor.

Next steps for your organization

You now have a practical, structured view of what security questions to ask a software vendor for modern businesses. To turn this into action:

1. Define your risk tiers and write them down.
2. Select your core question set for all vendors, plus extended sets for medium and high-risk categories.
3. Update your procurement or tool-request process to include these questions early.
4. Identify your top 5–10 existing critical vendors and run a lightweight security refresh with them.
5. Decide when to involve security and legal, based on data sensitivity and business impact.

If you want help tailoring a vendor security checklist to your stack and risk profile, the VarenyaZ team can work with your leaders to design a right-sized, repeatable process: https://varenyaz.com/contact/