Comparison

SOC 2 vs. ISO 27001 vs. DPDPA: A Mapping Guide for Cross-Border Operations

Three frameworks, partial overlap, different audiences. When you need which, how they map to each other, and how to design one control set that satisfies all three.

By Hemant Attri, Founder, Attri Edge Updated June 25, 2026 2 min read

These three frameworks together cover the global enterprise compliance map for US SaaS with India operations. Done right, you build one control set that satisfies all three — the “assess once, map to many” approach. Done wrong, you run three duplicate projects.

Quick summary: who needs which

SOC 2: US enterprise buyers. ISO 27001: European and global buyers, some regulated sectors. DPDPA: anyone processing personal data of Indian residents — which includes nearly every company with an India team or Indian users.

Framework structure compared

SOC 2 is an attestation (a CPA opinion on your controls over a period). ISO 27001 is a certification (an accredited body certifies your ISMS). DPDPA is a law (statutory obligations enforced by a regulator). Different instruments, overlapping requirements.

Control overlap (with mapping)

Roughly 75% of controls overlap between SOC 2 and ISO 27001 (access control, change management, vulnerability management, incident response). Roughly 70% overlap between SOC 2 Privacy and DPDPA (notice, consent, rights, breach notification). The DPDPA-to-SOC 2 detail is in the cross-mapping playbook.

Audit/certification differences

SOC 2 is issued by a US CPA firm; ISO 27001 by an accredited certification body (TÜV, BSI, DNV, Bureau Veritas — well-established in India); DPDPA compliance is self-implemented and, for Significant Data Fiduciaries, independently audited annually.

Cost comparison

First-time, ballpark: SOC 2 $25K–$70K, ISO 27001 $20K–$50K, DPDPA implementation $15K–$60K. A unified control set cuts the combined cost meaningfully versus three separate efforts.

Sequencing recommendation

US-focused: SOC 2 first, ISO 27001 when European demand appears, DPDPA in parallel from day one if you have Indian data. Europe-focused: ISO 27001 first. DPDPA is never “later” if Indian residents are in scope.

The unified control set approach

Build controls once; map each to SOC 2, ISO 27001, and DPDPA. This is the “assess once, map to many” methodology — covered in its own vocabulary entry — and it’s how the GCC compliance encyclopedia frames a complete program.

Where Attri Edge fits

The diagnostic tells you which frameworks your buyers actually require and produces a unified-control-set roadmap. $999, 48-hour deliverable.

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Frequently asked questions

Do we need all three?
Not always. SOC 2 if you sell to US enterprise; ISO 27001 if you sell to European/global buyers; DPDPA if you process Indian residents' data (which most India-operating companies do). Many US-SaaS-with-India teams end up needing all three over time.
Can ISO 27001 substitute for SOC 2?
Sometimes for European buyers, rarely for US enterprise. US buyers usually want SOC 2 specifically. Some accept ISO 27001 as an interim, but the safe answer for US enterprise is SOC 2.
What about HIPAA, PCI?
Those are sector-specific overlays — HIPAA for health data, PCI for card data. They layer on top of a SOC 2/ISO foundation rather than replacing it.
Sequence order recommendations?
SOC 2 first if US-focused, ISO 27001 first if Europe-focused. DPDPA implementation is non-optional if you have Indian users and should run in parallel, not last.
Cost savings from a unified control set?
Substantial. With ~75% overlap between SOC 2 and ISO 27001 and ~70% between SOC 2 Privacy and DPDPA, designing one control set and mapping it to all three cuts duplicate work by roughly 40–60%.