SOC 2 Type II vs ISO 27001: Which One Does Your Business Actually Need?

What Is SOC 2?

SOC 2 (System and Organisation Controls 2) is a standard developed by the American Institute of Certified Public Accountants (AICPA). It evaluates an organisation's information systems against five Trust Service Criteria: Security, Availability, Processing Integrity, Confidentiality, and Privacy. Most SOC 2 engagements focus primarily on Security (which is mandatory).

Type I vs Type II: A SOC 2 Type I report assesses whether your controls are designed appropriately at a single point in time. A SOC 2 Type II report assesses whether those controls operated effectively over a period of time (typically 6–12 months). Enterprise customers and SaaS buyers almost always require Type II. Type I is typically only useful as a stepping stone to Type II or for very early-stage companies.

Who issues it: SOC 2 reports are issued by licensed CPA firms (in the US) or their international equivalents. It is not a certification — it is an attestation report.

Who it is for: Primarily US enterprise customers and global enterprise SaaS buyers who need to assess the security posture of their vendors. If your customer procurement team asks for your SOC 2 report, they are asking for a vendor security assessment in a standardised format.

What Is ISO 27001?

ISO 27001 is an international standard published by the International Organisation for Standardisation (ISO) and the International Electrotechnical Commission (IEC). It specifies requirements for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS). It covers 93 controls across 4 themes: Organisational, People, Physical, and Technological.

It is a certification: Unlike SOC 2, ISO 27001 results in a formal certificate issued by an accredited certification body. The certificate is valid for 3 years with annual surveillance audits.

Who recognises it: ISO 27001 is recognised globally, including in the EU, UK, India, Middle East, Asia-Pacific. It is the de facto standard for information security internationally, outside the US enterprise SaaS context.

Key Differences

• Standard body: SOC 2 = AICPA (US). ISO 27001 = ISO/IEC (international).
• Output: SOC 2 = attestation report (not a certificate). ISO 27001 = formal certificate.
• Scope: SOC 2 scope is defined by the service commitments you make. ISO 27001 scope is your ISMS boundary (can be the whole organisation or a subset).
• What auditors check: SOC 2 = evidence of controls operating over the audit period. ISO 27001 = whether the ISMS is established, implemented, maintained, and improving.
• Audience: SOC 2 = primarily US enterprise customers. ISO 27001 = globally recognised, especially in regulated industries and international markets.
• Renewal: SOC 2 Type II requires annual renewal. ISO 27001 is a 3-year certification with annual surveillance audits.
• Cost and timeline: Both require 6–12 months of preparation. ISO 27001 tends to be more document-intensive upfront; SOC 2 requires a longer observation period. Costs vary significantly by organisation size and scope.

When You Need SOC 2

• You are selling to US enterprises or US-listed companies with vendor security questionnaire processes
• Your US customers' procurement teams specifically ask for SOC 2
• You are an enterprise SaaS company with significant US revenue and need to close sales with large enterprise accounts
• Your investors or board require it as a maturity milestone

When You Need ISO 27001

• You are selling to European, UK, Middle Eastern, or Indian enterprise clients
• You are building toward government or regulated sector contracts in India
• You want a formal ISMS that improves your internal security governance (not just a vendor-facing report)
• Your DPDP Act compliance programme benefits from ISO 27001 alignment (the Act references "reasonable security safeguards" and ISO 27001 is widely accepted as demonstrating this)
• You need a certification that is universally understood across markets

If your primary market is India or global markets outside the US, ISO 27001 typically gives you more traction. SOC 2 is specifically designed for US enterprise software procurement workflows. Outside that context, many procurement teams are simply not familiar with what it means.

Infosek Team

The Critical Indian Context: SEBI and RBI Do Not Accept SOC 2

This is a common misconception in the Indian fintech and SaaS space: SOC 2 is not a substitute for SEBI or RBI mandatory audits. SEBI's CSCRF requires IS audits by CERT-In empanelled auditors (see our SEBI CSCRF Compliance Checklist). RBI's IT framework requires IS audits by CISA-certified auditors (see our RBI IT Framework for NBFCs guide). A SOC 2 Type II report from a US CPA firm satisfies neither of these requirements.

If you are a fintech serving SEBI-regulated entities or an NBFC, you need:

• The mandatory SEBI/RBI audit (by CERT-In empanelled / CISA-certified auditors) — this is non-negotiable
• ISO 27001 if your ISMS maturity and customer requirements call for it
• SOC 2 additionally if you are targeting US enterprise clients

When You Need Both

Enterprise SaaS companies serving regulated industries often need both. A cloud platform serving US banks needs SOC 2 for US procurement and ISO 27001 for EU/UK/Indian customers. A fintech platform serving Indian NBFCs and global enterprises may need the RBI-mandated IS audit, ISO 27001, and SOC 2 — in that order of priority.

Cost and Timeline Ballpark

Both certifications require 6–12 months of preparation from a starting state of minimal documentation:

• ISO 27001: Certification audit typically takes 2–3 days for a mid-sized organisation. Annual surveillance audits and recertification every 3 years. Consultancy and certification costs vary widely by organisation size.
• SOC 2 Type II: Requires 6–12 months of observation period before the Type II report can be issued. Annual renewal thereafter. US CPA firms charge premium rates for the attestation report itself.