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Security diligence that separates evidence from claims

A bounded security workstream for an investment decision. We review what the target can show, separate observed from asserted, and deliver a red-flag memo with the unknowns named. Any testing needs the target's written authorisation.

For VC funds5 test areas · 15 named checksSynthetic examples only

Fig. 1 Evidence in, a decision-ready memo out. Light testing only with written authorisation. Synthetic

When teams ask for this

The target sells to enterprises

Revenue depends on passing customer security reviews. A weakness there is a commercial risk, not just a technical one.

The evidence is a questionnaire and a PDF

The data room holds a SOC 2 report, a pentest summary or a security questionnaire, and nobody on the deal team can say what they actually cover.

The product holds sensitive data or acts for customers

Multi-tenant customer data, payments, an AI feature with access to customer records, or integrations into customers' systems.

After the round closes

The company needs a baseline and a first-year security plan before its next enterprise deal.

What we test

Named test areas and checks. The scope record in your proposal confirms which apply to your system.

Product and architecture3 checks

  • Hosting, data flows and where sensitive data lives
  • Tenant isolation approach and how it is enforced
  • Critical third parties, including model and AI providers

Identity and access3 checks

  • Customer authentication: SSO, MFA, session handling
  • Staff, support and administrator access to production
  • Secrets management and offboarding

Security practice3 checks

  • Code review, dependency management and release controls
  • Past assessments, open findings and remediation records
  • Incident process and disclosed incident history

Assurance claims3 checks

  • Scope, period, exceptions and carve-outs of supplied SOC 2 or ISO reports
  • What a supplied pentest actually tested, and when
  • Security commitments in customer contracts, as provided

Light-touch technical checks (with the target's written authorisation)3 checks

  • Targeted checks on a test tenant, such as cross-tenant access
  • Review of externally exposed services the target lists
  • Spot check of a supplied pentest finding to confirm its fix, with the target's agreement

What you receive

Items marked “terms to confirm” are set out in your proposal.

DeliverableStatus
Red-flag memoDecision questions, material observations, evidence strength and unresolved questions, written for the deal team.Included
Evidence registerEvery observation labelled as observed, documented, stated by management or unverified.Included
Management question listSpecific follow-up questions for the target before signing.Included
Post-investment prioritiesRanked actions with dependencies and effort assumptions.Included
Light-touch testing notesResults of authorised checks, with exact scope and limits.Terms to confirm
Target-facing technical detailA version for the company, shared only under agreed disclosure terms.Terms to confirm
Portfolio baseline assessmentA scoped pentest or architecture review after investment, commissioned separately.Terms to confirm

What we need, and what this is not

What we need from you

  • An engagement letter naming the commissioning client, memo recipients and permitted reliance.
  • Target cooperation: data room access, a technical contact and interview time.
  • For any testing, the target's signed authorisation listing assets, windows and contacts.
  • A conflict check covering any past or current ZenoPentest work for the target.

Not included

  • Investment recommendations, valuation or deal terms.
  • Full technical diligence: scalability, code quality, engineering organisation, IP ownership.
  • Legal, regulatory, privacy or insurance opinions.
  • Any testing without the target's written authorisation. A fund's mandate does not authorise it.
  • A full penetration test inside a diligence window, unless separately scoped with the target.

How we approach it

What this workstream answers

A deal team rarely needs a vulnerability list. It needs to know whether the target’s security position could hurt the investment case. The review is organised around a small set of decision questions agreed at the start, for example:

  • Could a security gap block or delay enterprise sales in the next 18 months?
  • Do the target’s security claims to customers match what it can show?
  • Is customer data separated between tenants by design, or by convention?
  • What will the first year of security work cost in engineering attention?

The questions shape what gets examined. A target selling to banks and one selling to small businesses deserve different emphasis.

How the memo labels evidence

Every observation carries a label, so the deal team can weigh it:

Label Meaning
Observed Seen directly in a system, configuration or authorised check
Documented Supported by a supplied record, such as a report or ticket history
Stated Asserted by management in interview, not yet supported
Unverified Claimed but not examinable in the time or access available

This matters most with assurance documents. A SOC 2 report covers a defined system and period, and its exceptions and carve-outs can matter as much as the opinion. A pentest summary covers the scope it names, which may not include the product being invested in.

What the target is asked for

Requests stay proportionate to the deal stage. A typical list:

  • An architecture overview or a one-hour walkthrough with the technical lead
  • The most recent assessment reports, with their scope statements
  • Open security findings and how they are tracked
  • How staff and support access production, and who approves it
  • Any SOC 2 or ISO report, including exceptions and bridge letters

Credentials, source code and customer data are not requested for a document review.

Light-touch testing, only with authorisation

Some questions cannot be settled on paper. Does tenant A’s token really fail against tenant B’s records? Where a check would change the answer, ZenoPentest asks the target for written authorisation to run narrow tests, ideally on a test tenant with synthetic data.

The fund cannot grant this permission. If the target declines, the memo records the claim as unverified. A diligence window is too short for a full penetration test, and the memo does not present light checks as one.

Working inside a deal timeline

The first conversation sets the investment committee date, the evidence available and the questions that matter most. The proposal states what can credibly be covered in that window. If the window is too short for a useful answer, ZenoPentest says so before engagement rather than producing a thin memo.

After the investment: portfolio baselines

Diligence often leaves a list of known gaps. After closing, the company can commission a scoped baseline:

  1. A penetration test of the main application and API
  2. An authorization or architecture review where diligence raised questions
  3. A ranked remediation plan the company owns

The portfolio company is usually the client for this work. What the fund sees is agreed with the company in advance.

Independence and conflicts

Diligence conclusions and follow-on work stay separate. Prior work for the target is disclosed. Remediation is scoped as a new engagement. We propose that fees do not depend on the conclusion or on completion of the deal.

What shapes the scope

Packages have published starting prices. These factors move a quote up or down.

See pricing

Deal timeline

Time to investment committee sets how much can credibly be examined.

Evidence readiness

What the data room holds and how quickly the target answers.

Product complexity

Tenancy model, data sensitivity, integrations and AI features.

Testing authorisation

Whether the target permits any technical checks, and on what.

Recipients and reliance

Co-investors, lead advisers and who may rely on the memo.

Buying directly, or through an agency

Buying for your own product

The fund commissions directly. A deal or operating partner is the client, the target cooperates under the fund's process and the memo is addressed to the fund.

Buying through an agency

Introduced by an adviser or accelerator. The security workstream sits alongside a lead diligence adviser's, or an accelerator introduces a company for baseline work. Agree who the client is, who reads the output, who speaks to the target and how findings flow into the adviser's report.

Being confirmed
  • Delivery readiness: a diligence lead, quality review and capacity are not yet confirmed. Enquiries are for scoping discussion until they are.
  • Whether light-touch technical checks are offered at launch.
  • Engagement letter terms: reliance, liability and recipients.
  • Delivery model (in-house or partner-led), including any diligence partner.
  • Prices and turnaround.

How the engagement runs

How we work, step by step
  1. 01Scoping callScope record
  2. 02Written scope and authorisationSigned authorisation
  3. 03Access and test accountsAccess checklist
  4. 04Testing windowCritical-issue escalation
  5. 05ReportReport and evidence
  6. 06ReadoutEngineer walkthrough
  7. 07RetestVerification ledger

Questions about investment security diligence

Is this full technical due diligence?

No. It is the security workstream. Scalability, code quality, engineering organisation, IP ownership and product defensibility need their own specialists and scopes.

Can the fund authorise testing of the target?

No. Only the system owner can. Investor commissioning covers the review; any technical check needs the target's written authorisation with named assets and contacts.

What if the target declines testing?

The review proceeds on documents and interviews, and the memo says plainly which claims could not be verified technically.

Does the memo say whether to invest?

No. It describes security risks, evidence strength and open questions. Investment and residual-risk decisions stay with the fund.

Does the target see the findings?

Recipients are set in the engagement letter. A technical version for the company is often useful, but is shared only on agreed terms.

Can you work alongside another diligence adviser?

Yes, if responsibilities, reporting lines and recipients are agreed first. The security memo can feed the lead adviser's report.

How do you handle conflicts and follow-on work?

Prior work for the target is disclosed before engagement. Post-investment work is scoped separately, and we propose that fees do not depend on the conclusion or on the deal completing; this is confirmed in the engagement letter.

Can you meet our investment committee date?

Timing depends on scope, evidence readiness, target cooperation and capacity. The proposal states what can credibly be assessed in the time available.

Scope your investment security diligence.

Tell us the system and the requirement behind it. You get scoping questions, then a fixed quote.