When reviewing vendor certifications for handling and processing of company data, which of the following is the BEST Service Organization Controls (SOC) certification for the vendor to possess?

SOC 1 Type 1 focuses on controls relevant to financial reporting (ICFR) at a single point in time, making it irrelevant for evaluating general data handling and processing security controls.

SOC 2 Type 1 covers the correct Trust Service Criteria for data handling but only evaluates whether controls are suitably designed at a single point in time, providing no assurance that those controls operate effectively over a sustained period.

SOC 2 Type 2 evaluates controls specifically related to security, availability, processing integrity, confidentiality, and privacy - the Trust Service Criteria directly relevant to data handling. Unlike Type 1, Type 2 assesses whether those controls operated effectively over a defined period (typically 6–12 months), providing much stronger assurance that the vendor consistently protects company data rather than just having controls in place at a single point in time.

SOC 3 is a publicly available summary report based on SOC 2 criteria but lacks the detailed control descriptions and auditor testing results needed to thoroughly evaluate a vendor's data handling practices, making it insufficient for vendor due diligence.