SOC 2
SOC 2 reports describe controls against selected trust criteria. Ask whether the report is Type I or Type II, which services are covered and whether important exceptions were noted.
ISO 27001
ISO 27001 covers an information security management system. Review the statement of applicability and certified scope because a certificate may cover one business unit or location rather than the whole service.
PCI DSS and HIPAA
These signals matter when payment data or protected health information enters scope. Confirm exactly where the provider acts as a service provider and which responsibilities remain with the buyer.
ISO 9001
ISO 9001 addresses quality management. It can support confidence in repeatable service processes but does not by itself establish security maturity.
A buyer verification routine
Ask for the current report or certificate, match the legal entity to the contracting party, check the covered services and record the next renewal date. Repeat the check during annual service reviews.