Like SOC 2, a SOC 3 examination addresses controls relevant to security, availability, processing integrity, confidentiality, or privacy according to scope. The difference is distribution and depth: SOC 3 omits the detailed system description, test procedures, and results that make SOC 2 restricted-use.
Because the report is designed for general distribution, organizations often use a SOC 3 seal or report for public assurance marketing while providing the SOC 2 under NDA for substantive evaluation. A reviewer relying only on SOC 3 sees an auditor’s opinion and scope, not the underlying control evidence.
Key points
ScopeConfirm which Trust Services Criteria were included, the period or date covered, the system boundary, and any subservice organizations — the seal alone communicates none of this.
Use caseSuitable for public-facing assurance and preliminary screening; inadequate for a customer’s own risk assessment, which needs the SOC 2’s detail.
Important limitationThe general-use format means the reader cannot inspect tests, exceptions, or complementary-user-entity controls. A SOC 3 seal is a summary signal, not evidence a procurement or risk process can rest on.