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Data center certifications explained: Uptime, TIA-942, ISO 27001, SOC 2, PCI DSS
Certifications answer different questions. Some are about the building, some about security processes, some about payments. Knowing which is which keeps you from buying the wrong assurance.
Updated: 2026-11-09
About the building
Uptime Institute Tier certification rates design, construction and operations for resilience. ANSI/TIA-942 is a standard with four ratings for infrastructure, from Rated 1 to Rated 4, assessed by accredited auditors.
About security and controls
ISO/IEC 27001 certifies an information security management system. It covers how a company manages security risk, not a particular building by itself. SOC 2 is an audit report on controls such as security and availability, issued by an independent accountant; check whether it is Type I (a point in time) or Type II (over a period).
About payments
PCI DSS applies to environments that store, process or transmit payment card data. A provider can be PCI DSS compliant for its own scope without making your application compliant.
What to ask
Ask for the certificate or report itself, the date, the scope (which site, which services) and the issuing body. A logo on a website is not evidence of any of these.
Does ISO 27001 mean the building is resilient?
No. It covers information security management, not power or cooling resilience.
Is a SOC 2 report public?
Usually not. Providers share it under NDA, so ask for it during evaluation.