SOC 2 vs ISO 27001: Which Certification Does Your Company Need?

Quick Overview

SOC 2 and ISO 27001 are the two most commonly requested security credentials in B2B software sales. Both demonstrate that your company takes information security seriously, but they differ in origin, structure, audience, and what they actually prove.

SOC 2 is an attestation report issued by a licensed US CPA firm. ISO 27001 is an international standard certification issued by an accredited certification body. One is a report; the other is a certificate. That distinction matters more than it sounds.

What Is SOC 2?

SOC 2 (System and Organisation Controls 2) was created by the American Institute of Certified Public Accountants (AICPA). It evaluates a service organisation's controls against five Trust Services Criteria: Security (mandatory), Availability, Processing Integrity, Confidentiality, and Privacy.

A SOC 2 Type I report attests that controls are suitably designed at a point in time. A Type II report goes further — it attests that controls operated effectively over an observation period, typically 6–12 months. Enterprise buyers almost always require Type II before signing large contracts.

The result is a detailed audit report — not a certificate or badge. You share the report under NDA with customers and prospects who request it.

What Is ISO 27001?

ISO/IEC 27001 is an international standard published by the International Organisation for Standardisation. It specifies requirements for an Information Security Management System (ISMS) — essentially a formal, documented programme for managing information security risk.

Certification is issued by an accredited third-party certification body (e.g. BSI, TÜV, Bureau Veritas) after a two-stage audit. The certificate is valid for three years, with annual surveillance audits in years two and three.

Unlike SOC 2, ISO 27001 certification results in a publicly shareable certificate and registration number. Prospects can verify your certification status on the certification body's public registry.

Key Differences Side by Side

Origin and governing body: SOC 2 is governed by the AICPA (US); ISO 27001 is governed by ISO/IEC (international). Auditor type: SOC 2 requires a licensed CPA firm; ISO 27001 requires an accredited certification body. Output: SOC 2 produces a confidential report; ISO 27001 produces a public certificate.

Scope flexibility: SOC 2 lets you choose which Trust Services Criteria to include, allowing narrow or broad scope. ISO 27001 requires you to define an ISMS scope and apply all 93 controls from Annex A (with documented exceptions). This makes ISO 27001 more prescriptive.

Continuous obligation: SOC 2 Type II requires a new audit every 12 months to maintain a current report. ISO 27001 has annual surveillance audits plus a full re-certification every three years.

Market Acceptance by Region

United States and Canada: SOC 2 is the de facto standard. Enterprise procurement teams, especially in fintech, healthcare SaaS, and HR tech, almost universally require a current SOC 2 Type II report. ISO 27001 is understood but rarely the primary requirement.

Europe and the UK: ISO 27001 is widely recognised and often required by government and financial sector buyers. SOC 2 is accepted but less familiar. If you are selling into FTSE 500 procurement processes, ISO 27001 will accelerate deals.

India, APAC, and the Middle East: ISO 27001 carries strong recognition. SOC 2 is growing in acceptance as Indian SaaS companies increasingly sell into the US market. For domestic Indian enterprise sales, ISO 27001 or IS/ISO 27001 remains more commonly requested.

Control Overlap and Dual Certification

There is substantial overlap between SOC 2 Trust Services Criteria and ISO 27001 Annex A controls — analysts estimate 60–70 % of the underlying controls are materially similar. Access management, encryption, vulnerability management, incident response, and change management are required by both.

Companies that pursue both certifications simultaneously using a unified control framework can reduce the total effort by roughly 40 % compared to running two separate programmes. Automation tools like AuditPath map evidence once and satisfy both frameworks.

A practical sequencing for Indian B2B SaaS companies targeting both US and European revenue: complete SOC 2 Type I first (fastest path to unblock US deals), then extend to SOC 2 Type II while simultaneously beginning ISO 27001 work using the already-built control library.

Which Should You Choose?

Choose SOC 2 first if: more than 60 % of your target revenue is from US-based customers, your prospects ask for it in RFPs, or your sales team is losing deals to competitors who have it.

Choose ISO 27001 first if: your primary market is Europe, the UK, or government sectors; your customers specifically request it; or you operate in a regulated sector (banking, insurance, healthcare) where ISO 27001 is a contractual requirement.

Pursue both if: you are scaling globally and can invest in a unified compliance programme. The marginal cost of adding ISO 27001 after SOC 2 is relatively low when your evidence library is already built.

Cost and Timeline Comparison

SOC 2 Type II total cost typically ranges from $15,000 to $50,000 USD depending on auditor, scope, and number of Trust Services Criteria included. Using a compliance automation tool reduces preparation time and can lower total audit fees by 20–35 %. Timeline: 6–9 months from kickoff to report delivery.

ISO 27001 certification costs vary widely — typically $8,000 to $30,000 USD for the certification audit itself, plus internal preparation effort. Timeline: 6–12 months depending on ISMS maturity at the start.

Ongoing costs differ: SOC 2 requires an annual audit (recurring fee), while ISO 27001 requires annual surveillance audits (lower fee than initial certification) and a full re-certification every three years.