SOC 2 and ISO 27001 both prove you take security seriously, but they are not interchangeable. SOC 2 is a US-oriented attestation report from a CPA firm; ISO 27001 is a globally recognized certification of an information security management system. This guide compares them on attestation vs certification, geography, audit cadence, cost, and timeline, then adds the piece most comparisons skip: if you sell into the US defense supply chain, neither one satisfies your federal obligations.
If a customer or prospect is asking for proof of your security posture and you can only pursue one framework this year, here is the short answer: choose SOC 2 if your buyers are primarily US-based technology and enterprise companies, and ISO 27001 if your buyers are international or you want a certificate you can publish. SOC 2 produces an attestation report written by a licensed CPA firm and shared under NDA. ISO 27001 produces a formal, publicly displayable certificate issued by an accredited certification body against a defined information security management system (ISMS). Most mature software companies eventually pursue both, because the control sets overlap heavily and evidence collected for one satisfies much of the other. And if you sell into the US defense supply chain, read the last section first: neither framework covers your NIST 800-171 or CMMC obligations, and that is the gap most "SOC 2 vs ISO 27001" articles never mention.
SOC 2 is an attestation: a CPA firm examines your controls against the AICPA Trust Services Criteria and issues an opinion in a report. ISO 27001 is a certification: an accredited body audits your ISMS against the ISO/IEC 27001 standard and, if you pass, grants a certificate. Attestation reports describe; certificates declare. That difference drives almost every practical distinction below, from who can see the result to how often you re-do it.
| Dimension | SOC 2 | ISO 27001 |
|---|---|---|
| What you get | Attestation report (auditor's opinion + description of controls) | Certificate + audit report |
| Who issues it | Licensed CPA firm | Accredited certification body |
| Governing standard | AICPA TSP Section 100 — 2017 Trust Services Criteria (with 2022 revised points of focus) | ISO/IEC 27001:2022 |
| What it evaluates | Controls mapped to five Trust Services Criteria (Security always; Availability, Confidentiality, Processing Integrity, Privacy optional) | An Information Security Management System (ISMS) plus Annex A controls |
| Can you display it publicly? | No — report shared under NDA with customers/prospects | Yes — certificate is publicly displayable |
| Geography / recognition | Recognized globally but most common in North America | Recognized worldwide; the default in Europe, the Middle East, Asia-Pacific |
| Audit cadence | Type II covers a defined observation window (commonly 3–12 months); typically renewed annually | Certificate valid three years, with surveillance audits (typically annual) and full recertification at year three |
| Type I vs Type II | Type I = design at a point in time; Type II = operating effectiveness over a period | No point-in-time vs period distinction; audit assesses the ISMS over a short defined window (often a few days) |
| Audit fee range (SMB–mid-market) | Type I roughly $5,000–$25,000; Type II roughly $7,000–$50,000 (mid-market band commonly $15,000–$30,000) | Varies widely by ISMS scope; often quoted higher than a comparable SOC 2 for a first certification |
| All-in cost (audit + prep + tooling + internal time) | Type II commonly $30,000–$80,000 for SMBs | Comparable order of magnitude; scope-driven |
SOC 2 fee and timeline ranges above are drawn from published estimates by Secureframe, Sprinto, and Drata; present them as ranges, because actual cost varies by scope, number of Trust Services Criteria in scope, and auditor. The ISO 27001:2022 details reflect the current standard (see the note on the 2022 transition below).
The attestation-versus-certification split is not academic. It changes how you use the result in a sales cycle.
A SOC 2 report is a detailed document. It contains the auditor's opinion, a description of your system, the controls you claimed, and (in a Type II) the tests the auditor performed and any exceptions found. That richness is why enterprise security teams like it — they can read exactly what was tested. But because it contains sensitive detail, you share it under a non-disclosure agreement, usually late in a deal, and you cannot slap a SOC 2 badge on your homepage as proof (a logo is not the report).
An ISO 27001 certificate works the opposite way. It is a short declaration that an accredited body found your ISMS conformant. You can publish it, list the certificate number, and let a prospect verify it with the certification body. The trade-off: the certificate alone tells a buyer far less about what was actually tested than a SOC 2 report does.
Practitioner translation: SOC 2 gives your buyer's security reviewer more to read; ISO 27001 gives your marketing and procurement teams something to show. Many companies want both effects.
Both standards are recognized globally, but the center of gravity differs.
If you sell across both markets, that is the clearest signal to plan for both frameworks eventually. The good news, covered next, is that doing both is far less than double the work.
SOC 2 Type II is built around an observation window — the auditor tests whether your controls operated effectively across a period, commonly 3 to 12 months, with three months a typical minimum. You generally renew annually so there is no gap in coverage. A first Type II end-to-end (readiness through report) often runs roughly three to six months depending on how ready you are.
ISO 27001 runs on a three-year certification cycle: an initial certification audit (Stage 1 documentation review, then Stage 2 on-site/operational audit), annual surveillance audits to confirm the ISMS is still running, and a full recertification at year three. The audit itself typically spans a few days rather than months, because it samples the ISMS rather than testing operating effectiveness across a long window the way a SOC 2 Type II does.
Because SOC 2 and ISO 27001 both rest on a common core of security controls — access management, change management, risk assessment, vendor management, monitoring, incident response — evidence you collect for one satisfies a large share of the other. Teams that run both on a single control set typically map each piece of evidence once and reuse it across frameworks, so the second framework is an increment, not a second full project.
Pursue both when you have (or expect) buyers in both US and international markets, or when different customers in your pipeline are asking for different proofs. Start with the one your current pipeline is asking for, then layer the second on the same control foundation.
The migration from ISO/IEC 27001:2013 to ISO/IEC 27001:2022 is complete. The three-year migration grace period ended October 31, 2025; as of that date all 2013-standard certificates are expired or withdrawn regardless of their printed expiry date, and certification bodies treat a lapsed 2013 organization as a new client requiring a full initial (Stage 1 + Stage 2) audit rather than a transition audit. The 2022 revision restructured Annex A into 93 controls across four themes — Organizational, People, Physical, and Technological — consolidating the prior 114 controls and adding 11 new ones (including threat intelligence, cloud security, and data leakage prevention). If you are scoping ISO 27001 today, work from the 2022 control set; any guide still describing the 2013 Annex A as current is out of date.
For SOC 2, the standard in force remains the AICPA 2017 Trust Services Criteria with 2022 revised points of focus. The 2022 update revised the points of focus only — the five criteria themselves are unchanged since 2017, and there is no newer TSC version as of 2026.
Here is the section you will not find in the typical trust-automation vendor's comparison page — and the one that matters most if you sell to the government.
SOC 2 and ISO 27001 are commercial-trust frameworks. Neither one satisfies US federal contracting requirements. If your company handles Controlled Unclassified Information (CUI) on your own systems as part of a Department of War (DoW) contract or subcontract, your obligations run through a different stack entirely:
None of that is covered by a SOC 2 report or an ISO 27001 certificate. A defense contractor can hold a clean SOC 2 Type II and still be ineligible for award because it has not met its 800-171/CMMC obligations. The frameworks are complementary, not substitutes: SOC 2 and ISO 27001 answer "do commercial customers trust your security?"; 800-171 and CMMC answer "may the DoW supply chain contract with you?"
If you sell to both commercial and federal buyers, map your controls once across SOC 2, ISO 27001, and NIST 800-171 so the overlap does not turn into duplicate work. Compli.ai covers the federal side: our CMMC compliance software runs your NIST SP 800-171 and CMMC program, including SSP implementation statements, POA&M items, and a live SPRS score, inside your own Microsoft 365 tenant.
For the federal side of your program, see our guides to CMMC certification cost and timeline and, for the SOC 2 side, the SOC 2 compliance checklist and how much SOC 2 costs in 2026.
SOC 2 is an attestation report issued by a CPA firm against the AICPA Trust Services Criteria and shared privately under NDA. ISO 27001 is a certification issued by an accredited body against the ISO/IEC 27001:2022 standard for an information security management system, and the certificate can be displayed publicly. SOC 2 is more common in North America; ISO 27001 is the global default.
Neither is "better" in the abstract — they answer to different buyers. SOC 2 fits US-centric technology and enterprise sales because it gives security reviewers a detailed report to read. ISO 27001 fits international sales and gives you a publishable certificate. Companies selling across both markets typically pursue both on a shared control foundation.
Largely, yes. Both frameworks rest on a common core of security controls (access, change, vendor, incident, risk, monitoring), so evidence collected for one satisfies much of the other. Running both on a single control set means you map each piece of evidence once and reuse it, which is why the second framework costs far less than the first.
No. SOC 2 and ISO 27001 are commercial-trust frameworks and do not satisfy US federal contracting requirements. If you handle CUI on your systems for a DoW contract, you must implement NIST SP 800-171 (the Department assesses against Revision 2), meet any CMMC level your contract requires, and post a self-assessment score in SPRS — obligations that exist independently of any SOC 2 report or ISO certificate.
For SOC 2, a Type II audit fee commonly runs $7,000–$50,000 (mid-market band roughly $15,000–$30,000), with all-in program costs of $30,000–$80,000 for SMBs. ISO 27001 costs vary widely with ISMS scope and are often quoted higher than a comparable first-year SOC 2. Treat all figures as ranges — scope, criteria in scope, and auditor drive the number.
No. The transition to ISO/IEC 27001:2022 completed on October 31, 2025. All 2013-standard certificates are now expired or withdrawn, and organizations that let their 2013 certification lapse are treated as new clients requiring a full initial audit. Scope any new ISO 27001 work against the 2022 control set (93 controls across four themes).
Selling to federal buyers as well as commercial ones? Compli.ai runs your NIST SP 800-171 and CMMC program inside your own Microsoft 365 tenant, alongside whatever you use for SOC 2 and ISO 27001. Book a demo