SOC 2 Audits Create Vendor Lock-In for SaaS Startups

SOC 2 reporting now enters the operating life of many SaaS companies through customer and procurement requirements. The AICPA says customers and business partners often request SOC 2 reports to obtain information about the design, operation, and effectiveness of a service organization’s controls.

That timing matters because a SOC 2 examination encompasses the systems and controls used to deliver the service, including relevant dependencies on outside providers. Hosting, payments, authentication, communications, and compliance tooling can therefore enter the control environment and supporting evidence.

A SOC 2 Type II report evaluates control design and operating effectiveness over an examination period that commonly runs from three to 12 months, according to Schellman. That window makes early provider choices more consequential because those dependencies can shape the system description, control narratives, testing, and complementary controls assigned to subservice organizations in reports supplied to customers and other intended users.

CBIZ’s 2024 SOC Benchmark Study, which analyzed 193 SOC reports, found that 89.6% included subservice providers, up from 82% in the preceding study.

Why vendor choice starts to harden after the first audit

SOC 2 distinguishes between ordinary vendors and subservice organizations. According to Schellman, a provider becomes a subservice organization when its controls, together with the customer company’s own controls, are necessary to meet service commitments or the applicable Trust Services Criteria.

That classification has practical effects. If a startup depends on a cloud host’s physical and environmental controls, or on a payment processor’s security controls, those dependencies may need to be disclosed in the SOC report. They become part of the report rather than treated as background procurement detail.

Schellman also notes that vendor monitoring is necessary to meet common criterion CC9.2, which covers assessing and managing risks associated with vendors and business partners. In practice, that means maintaining inventories, reviewing assurance documents, and showing that critical third parties are being assessed on an ongoing basis.

Once a startup has documented those relationships, changing them becomes heavier. New providers may require fresh risk review, revised system descriptions, updated evidence, and customer explanations. This is especially true if the switch lands during an active sales cycle or near an annual renewal.

The cost structure favors early decisions that last

The audit fee alone is large enough to shape architecture. The Pun Group, a CPA firm, estimates Type II audit fees at $20,000 to $50,000 and readiness assessments at another $3,000 to $15,000. It identifies remediation, compliance software, employee training, and internal staff time as additional costs.

These figures separate the CPA examination from readiness and other operating costs. The first-year total varies with scope, existing control maturity, remediation needs, tooling, and the amount of internal labor required.

After the first Type II report, organizations generally enter an annual examination cycle. Schellman says the recurring reporting period is typically 12 months, with controls expected to operate and produce sufficient evidence during each period.

Timing also depends on the starting point. Schellman estimates 12 to 15 months for a sequence that includes readiness, Type I, and Type II work, while a repeat Type II examination can take about six calendar months. The Type II reporting period itself commonly spans three to 12 months.

For an early-stage company, recurring examinations place compliance inside the operating model. A provider already mapped into policies, control narratives, evidence requests, and auditor conversations becomes costlier to replace, especially during active sales cycles or near the close of a reporting period.

Enterprise security reviews extend pressure down the vendor chain

The buyer side of the market explains the pressure. The AICPA says customers and business partners often request SOC 2 reports to assess risks associated with a service organization, its services, and the systems used to provide them. NIST’s July 2026 supplier due-diligence guidance adds that many acquisition procedures recommend or require supplier risk assessment before an agreement is signed.

Third-party exposure gives those reviews greater weight. Verizon’s 2026 Data Breach Investigations Report found third-party involvement in 48% of breaches, a 60% increase from the prior year.

The governing framework remains the AICPA’s 2017 Trust Services Criteria with revised points of focus issued in 2022. The practical expansion is occurring in implementation: CBIZ’s benchmark shows more reports disclosing subservice providers, while AICPA guidance addresses vendor risk management under criterion CC9.2.

Where lock-in shows up most clearly

Lock-in concentrates in services close to core delivery, such as cloud infrastructure, identity, payments, email delivery, and logging. Their controls can directly support the startup’s own service commitments.

If those providers are necessary to satisfy trust criteria, they can become part of the reportable system boundary. Schellman says subservice organizations must have the nature of their services disclosed in the SOC report.

Under the carve-out method, the report excludes the subservice organization’s controls from testing while still describing the relevant services and complementary controls expected from that provider. This creates commercial inertia around the relationship.

A switch can trigger updates across security questionnaires, risk records, internal policies, system descriptions, evidence mappings, and customer explanations. Switching costs rise after the audit scope is set, the evidence is built, and the report enters enterprise sales.

Compliance tooling can reduce labor while adding another dependency

Compliance platforms can reduce labor by connecting to cloud, identity, ticketing, and development systems for recurring evidence collection. The Pun Group identifies continuous-monitoring tools as a separate annual cost and notes their role in automating evidence collection.

Once a platform becomes the repository for evidence, policies, control mappings, and auditor requests, replacing it requires a data and process migration during an active compliance cycle. Compliance tooling therefore deserves the same switching-cost review as payments, identity, and infrastructure.

What startups can still control before scope is fixed

The clearest leverage point is timing. Before the first SOC 2 scope is defined, startups can decide which systems are stable enough to formalize and which are still likely to change. This is important as the product and pricing model evolve.

Services with high switching risk or uncertain long-term economics are the best candidates for modular design. A company can place abstraction layers around payments, communications, or identity. This allows one provider to be replaced without rewriting the product or rebuilding the entire control story.

Bringing a function in-house can preserve flexibility by replacing a third-party assurance dependency with direct engineering and operational responsibility. The tradeoff is higher internal ownership of controls, documentation, and evidence.

For many enterprise-facing startups, customer demand determines when SOC 2 enters the roadmap. The strategic question is which dependencies should be formalized inside the reportable system and which should remain replaceable. That choice belongs before the first audit turns provider relationships into part of the company’s recurring assurance and sales infrastructure.

Sources

• AICPA & CIMA. "SOC 2 Reporting on an Examination of Controls at a Service Organization Relevant to Security, Availability, Processing Integrity, Confidentiality, or Privacy." AICPA, updated 2022.
• AICPA & CIMA. "2017 Trust Services Criteria With Revised Points of Focus – 2022." AICPA, 2023.
• AICPA & CIMA. "Maintaining High Standards for SOC Engagements." AICPA, 2023.
• CBIZ. "The Evolution of SOC Reporting: Key Findings from the 2024 SOC Benchmark Study, Part Two." CBIZ, 2025.
• Schellman. "Understanding SOC Reports: Type 1 vs. Type 2." Schellman, 2025.
• Schellman. "The Difference Between Subservice Organizations and Vendors." Schellman, 2022; updated 2026.
• The Pun Group. "SOC 2 Costs Explained: What to Expect in 2025." The Pun Group, 2025.
• National Institute of Standards and Technology. "NIST Releases the Finalized C-SCRM Due Diligence Assessment Quick-Start Guide." NIST, 2026.
• Verizon. "2026 Data Breach Investigations Report." Verizon, 2026.