M&A due diligence · SaaS & technology
M&A Privacy & Security Due Diligence for B2B SaaS Companies
Privacy due diligence for a B2B SaaS company runs in two directions: preparing your own program before an investor or acquirer's diligence team goes through it, or running that same review on a target you are acquiring. Both start from the same question — does the sub-processor list, the DPA set and the SOC 2 posture actually match what the data room claims. We run the review before the deal terms are set, not after.
Reviewed by the Privacy Horizon team · Last reviewed
What you're protecting
What diligence on a SaaS company actually examines
A financial or legal diligence checklist misses the operational specifics that determine whether a privacy or security program is real.
Sub-processor list accuracy
Whether the published sub-processor list matches what the product actually uses in production, since a mismatch here is one of the fastest ways diligence uncovers an unreliable data room.
DPA and SCC coverage
Whether every customer contract with a data-processing component has a corresponding DPA on file, and whether SCCs are current for any EU customer exposure, rather than assumed to exist.
SOC 2 or ISO 27001 report currency and scope
Whether an existing report actually covers the systems in question, is current rather than expired, and reflects the criteria a buyer's own risk appetite requires — a report can exist and still not answer the real question.
Breach and incident history
Whether past incidents, including sub-processor incidents, were handled, documented and disclosed appropriately, since undisclosed history discovered after signing is a common source of post-close disputes.
Law 25 and cross-regime exposure
Whether Quebec's person-in-charge and PIA obligations are met if the company has Quebec users, and whether HIPAA or PHIPA duties apply if health-sector customers are in the mix, since gaps here carry statutory penalty exposure a buyer inherits.
Regulatory map
Why privacy and security diligence has become standard, not optional
Deal structures increasingly price in what a review like this finds, on both sides of the transaction.
Law 25's administrative penalties
Quebec's statute carries penalties up to $10M or 2% of worldwide turnover, a liability an acquirer inherits along with the target's customer base if it is Quebec-exposed and out of compliance.
PIPEDA obligations transferring with the business
Personal information collected under the target's original privacy commitments generally has to keep being handled consistent with those commitments post-acquisition, which affects how quickly systems can actually be integrated.
OSFI B-10 exposure inherited with bank customers
If the target serves federally regulated financial institutions, their third-party risk expectations around subcontracting and incident notification travel with the customer relationship into the acquirer's hands.
Contractual sub-processor obligations
Post-close integration often means adding the acquirer as a new sub-processor across the target's customer base, which triggers the same 30-day contractual objection windows that govern any other sub-processor change.
What goes wrong
What diligence catches before it becomes the buyer's problem
The exposures that erode deal value are rarely dramatic on their own — they are gaps that compound once ownership changes.
A SOC 2 report that does not prove what it appears to
A report scoped narrowly, or one nearing expiry with no observation period underway for renewal, can look reassuring in a data room while leaving material gaps a careful review has to surface directly.
Undisclosed sub-processor incidents
A target that experienced a vendor-side incident, in the pattern of Okta's 2023 support-system breach, but never disclosed it to affected customers carries liability that transfers to the acquirer the moment the deal closes.
Consent gaps in data-sharing arrangements
Data flowing to advertising or analytics platforms without valid consent, the pattern behind the OPC's finding against Home Depot, is exactly the kind of gap that surfaces during customer data review and can trigger post-close regulatory attention.
Shadow infrastructure inherited unknowingly
A target's use of an unreviewed file-transfer or integration tool, the kind of exposure the MOVEit compromise exploited across many organizations, may not appear in any inventory the acquirer is given until diligence goes looking for it.
Our m&a due diligence for b2b saas companies
What our privacy due diligence delivers, on either side of a deal
Risk assessment, compliance review and integration support, whether you are being reviewed or doing the reviewing.
Risk assessment
A structured review of data handling, access controls and general privacy and security practices, identifying issues that could create complications after the deal closes.
Compliance review
Evaluation of alignment with PIPEDA, Law 25 and any US exposure like HIPAA against actual policies, procedures and system configuration, not just what the data room documents claim.
Sell-side readiness support
For companies preparing to be acquired or raise a round, we identify and close the gaps a buyer's diligence team is most likely to find, before they find them.
Post-close integration support
Guidance merging privacy and security practices between the two organizations, clarifying responsibilities and aligning standards so operations continue without new compliance gaps opening up.
How the engagement runs
How diligence runs against a real deal timeline
Structured to fit inside a transaction's schedule rather than slow it down.
Step 1
Scope the review
We confirm whether the engagement is sell-side preparation, buy-side review of a target, or both, and set a timeline that fits the deal calendar.
Step 2
Review documents and systems
Policies, DPAs, sub-processor lists, SOC 2 or ISO 27001 reports and incident history are reviewed against what the underlying systems actually show.
Step 3
Report findings and risk
Gaps are reported with an assessment of deal-relevance — what affects valuation or terms, what is a post-close remediation item, and what is a genuine blocker.
Step 4
Support integration or remediation
Once the deal closes, or once gaps are identified pre-close, we support closing them and merging privacy and security practices between the organizations.
What it costs
What shapes the cost of privacy due diligence
Cost depends on the target's or your own product complexity, how many jurisdictions and regulatory regimes are in scope, and how much existing documentation — DPAs, SOC 2 reports, incident records — is available to review versus needing to be reconstructed. A tightly scoped review of one product costs less than diligence spanning a multi-product portfolio.
We quote diligence engagements after understanding the deal structure and timeline, since a fast-moving Series B round and a longer acquisition process call for different levels of depth. Sell-side readiness work can often be folded into an existing Virtual Privacy Office or vCISO retainer if diligence is anticipated well ahead of a raise or sale.
B2B SaaS Companies: M&A due diligence questions, answered
Get your sub-processor list, DPAs and any SOC 2 or readiness documentation current and consistent before the investor's diligence team asks for them, and run an internal review to find gaps first. A company that identifies and explains its own gaps proactively fares far better than one caught unprepared mid-round.
Get a clear, prioritized remediation plan in front of them quickly, with realistic timelines, since a credible plan often matters more to deal terms than the existence of the gap itself. Gaps discovered during diligence are common; how the target responds is usually what determines whether it affects valuation or closing conditions.
No. A SOC 2 report attests to controls within a defined scope and period, but says nothing about systems or products outside that scope, and nothing about privacy-specific obligations like Law 25's person-in-charge requirement or PIPEDA consent practices. Diligence needs to look beyond the report to what it does not cover.
It centers on the sub-processor list, DPA coverage, tenant-data architecture and any current compliance reports, rather than physical security or paper records. The technical review of how data actually flows through the product matters as much as the policy review of what the company says it does.
Existing DPAs generally continue to govern the data they cover, but adding the acquirer as a new party or sub-processor across the target's customer base typically requires the same contractual notice and objection process any other sub-processor change would trigger, which needs to be planned into the integration timeline.
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