Short answer: if your next ten deals are US B2B SaaS, get SOC 2 Type I now and Type II in 12 months. If your buyers are EMEA, regulated, or government, get ISO 27001 first. Selling to both at scale? Run them together. The control overlap is roughly 80 percent.
ISO 27001 and SOC 2 are the two security frameworks that show up on every B2B procurement questionnaire. They overlap heavily on what they ask for and differ sharply on who signs the report, where the report is recognised, and how long it takes to earn. The table below is the 30-second answer; the sections after it explain each dimension in depth.
| Dimension | ISO/IEC 27001:2022 | SOC 2 (AICPA TSC 2017) |
|---|---|---|
| Standard owner | International Organization for Standardization (ISO) and IEC, current edition ISO/IEC 27001:2022 | American Institute of Certified Public Accountants (AICPA), Trust Services Criteria 2017 (revised 2022) |
| Output of a successful project | Certificate of registration issued by an accredited certification body, valid 3 years | Attestation report (Type I or Type II) signed by a licensed CPA firm |
| Who can sign off | ANAB or UKAS-accredited certification body (third-party registrar) | AICPA-licensed CPA firm with SOC 2 practice (auditor independence required) |
| Geographic recognition | Global, the recognised international standard for information security | Strongest in North America, growing in EMEA, less common in APAC |
| Prescriptive vs flexible | Prescriptive structure (10 clauses + Annex A), flexible on implementation | Outcome-based criteria, you pick the controls that meet each criterion |
| Control catalogue | Annex A 2022: 93 controls in 4 themes (Organisational, People, Physical, Technological) | 5 Trust Services Categories: Security (mandatory), Availability, Confidentiality, Processing Integrity, Privacy |
| Mandatory components | Risk assessment + Statement of Applicability + ISMS + management review + internal audit | Description of the system + applicable Trust Services Categories + control list + evidence of operation |
| Audit cycle | Stage 1 + Stage 2 initial audit, annual surveillance audits, recertification at year 3 | Type I (point-in-time) then Type II (6 to 12 month observation window); most buyers want a Type II |
| Typical timeline to first report | 9 to 15 months for first certification (gap analysis through Stage 2) | 3 to 6 months to Type I, then a 6 to 12 month observation period for Type II |
| Typical first-year cost | $30K to $120K all-in (consulting + tooling + audit fees) for a 50 to 500 employee company | $30K to $100K all-in for Type II for a similar-size SaaS |
| Renewal cadence | Annual surveillance, full recertification every 3 years | Annual Type II report covering the prior 12 months |
| Public-facing artefact | One-page certificate (some bodies also publish a public register) | Long-form report (50 to 150 pages), shared under NDA, not posted publicly |
| Buyer pull strongest in | Enterprise procurement, EMEA buyers, regulated industries, government contracts | US SaaS sales, vendor risk questionnaires, B2B technology procurement |
| Closest alternative if you skip it | ISO/IEC 27002 self-attestation (no certificate); some buyers accept HITRUST CSF | ISO 27001 + a security questionnaire response often satisfies the same need for non-US buyers |
Cost and timeline ranges synthesised from A-LIGN, AICPA, and ISO/IEC publications dated 2024 to 2026.
ISO/IEC 27001:2022 is the international standard for an Information Security Management System (ISMS). It is published by the International Organization for Standardization and the International Electrotechnical Commission, and it is the only globally accredited certifiable standard for information security.
Clauses 4 through 10 are mandatory and define the ISMS: context, leadership, planning, support, operation, performance evaluation, and improvement. Clauses 1 to 3 are scope and references. You cannot skip any of 4 to 10.
The 2022 revision restructured Annex A into 93 controls across 4 themes (down from 114 controls in 14 categories under the 2013 version). Pick the controls that apply, justify exclusions in the Statement of Applicability.
A third-party registrar accredited by a national body (ANAB in the US, UKAS in the UK, others worldwide) performs a Stage 1 document review and a Stage 2 operational audit. Certificates are valid 3 years with annual surveillance.
ISMS scope document, information security policy, risk assessment methodology, risk treatment plan, Statement of Applicability, internal audit programme, management review minutes, and evidence of corrective actions.
Policies, roles, supplier security, threat intelligence, incident response
Screening, awareness, terms of employment, disciplinary process, NDA
Physical perimeters, secure areas, equipment siting, clear desk, waste disposal
Access control, cryptography, secure development, logging, malware protection
SOC 2 (Service Organization Control 2) is an attestation engagement defined by the American Institute of Certified Public Accountants. A licensed CPA firm performs the engagement and issues a report against the AICPA Trust Services Criteria. It is not a certificate, it is a signed opinion. There are two report types.
A point-in-time report. The CPA tests whether your controls are designed appropriately as of a specific date. Faster to earn (3 to 6 months), useful as a stepping stone. Most enterprise buyers eventually want a Type II.
A period-of-time report. The CPA tests whether your controls operated effectively across an observation window (typically 6 to 12 months). This is the report B2B buyers ask for. Renews annually.
Five categories: Security (Common Criteria, mandatory), Availability, Confidentiality, Processing Integrity, Privacy. You pick which apply to your service and report against those. Most SaaS scope Security plus one or two others.
The CPA firm must be independent. They cannot have implemented the controls they audit. This rules out the model where a single vendor sells you the software and signs your report, common in some integrated SOC 2 platforms.
Protects information and systems against unauthorised access, disclosure, and damage. Maps to the CC-series criteria (CC1 through CC9). Every SOC 2 report covers Security.
Covers system availability for operation and use as committed or agreed. Most relevant for infrastructure platforms, communications providers, and any vendor whose downtime hurts the customer.
Protects information designated as confidential (contracts, business plans, IP) from improper disclosure. Often relevant for B2B SaaS handling customer business data.
Confirms system processing is complete, valid, accurate, timely, and authorised. Common for payment processors, billing systems, financial data platforms.
Addresses collection, use, retention, disclosure, and disposal of personal information per the entity's privacy notice. Overlaps with GDPR, CCPA, and HIPAA programmes.
Most comparison guides list 20 differences. Five of them drive the decision. The other 15 are footnotes.
ISO 27001 is signed by an accredited certification body (a registrar). SOC 2 is signed by an AICPA-licensed CPA firm. The auditor pool is different, the engagement letters look different, and the independence rules are different. CPA independence is stricter and bars the auditor from implementing the controls they test.
ISO 27001 is the global default. SOC 2 dominates US B2B SaaS procurement and is growing in EMEA but still treated as a US artefact in many European procurement processes. If your customer base is split, you will eventually need both.
ISO 27001 prescribes the structure (10 clauses, Annex A) and lets you choose the implementation. SOC 2 prescribes the outcomes (Trust Services Criteria) and lets you choose both the structure and the controls. Mature programmes find ISO 27001's structure useful; greenfield SaaS sometimes find SOC 2's flexibility faster.
ISO 27001 hands the buyer a one-page certificate and a Statement of Applicability on request. SOC 2 hands the buyer a 50 to 150 page report under NDA. Sales teams prefer the certificate (easier to share); security teams prefer the report (deeper evidence).
ISO runs a 3-year cycle: initial Stage 1 plus Stage 2, then annual surveillance, then recertification at year 3. SOC 2 Type II runs an annual cycle over a 6 to 12 month observation window. The ISO surveillance is lighter than the annual SOC 2 reissue, but the 3-year recertification is heavier.
Costs are similar for similar-size companies. ISO 27001 first year typically $30K to $120K all-in. SOC 2 Type II first cycle typically $30K to $100K. Doing both is usually $50K to $160K because the evidence overlap is large. Cost is not a credible reason to pick one over the other.
The answer depends on who is going to ask for the report. Six buyer profiles cover most of the field; pick the closest match and let your next ten deals decide.
Vendor risk questionnaires from US buyers ask for SOC 2 by name. The Type II report is what unlocks enterprise pipeline. Pick up ISO 27001 in year 2 when EMEA expansion lands.
European procurement defaults to the ISO certificate. SOC 2 is recognised but treated as a US artefact. ISO 27001 also aligns with GDPR Article 32 and the NIS 2 directive obligations.
Regulators recognise ISO 27001 as evidence of a managed security programme. Layer HITRUST, NIST 800-53, FFIEC, or PCI DSS on top depending on sector. SOC 2 lands later, when individual enterprise deals require it.
A Type I report (point-in-time) closes the deal in 3 to 6 months. Commit to a Type II observation window starting the day you sign. ISO 27001 can wait until you have 50 employees.
At this scale both frameworks pay off. Run them together using a shared control library: every piece of evidence collected for SOC 2 should also serve an ISO 27001 Annex A control. This is the cross-mapping play RiskWatch supports.
Federal procurement runs on NIST and FedRAMP, not SOC 2. ISO 27001 is a credibility signal for commercial work. Treat SOC 2 as optional unless a specific contracting officer asks for it.
“The right answer is the one your buyers will read. For US SaaS, that is SOC 2 Type II. For everyone else, it is ISO 27001. The companies that pick one and stick with it for three years almost always wish they had picked both from the start.”
ISO 27001 Annex A 2022 and SOC 2 Common Criteria overlap on roughly 80 percent of the controls. Treating them as two separate programmes is the most common (and most expensive) mistake. Treating them as one programme with two reports is the play.
The mechanic is a shared control library: each control is implemented and evidenced once, mapped to both ISO Annex A and SOC 2 TSC, and surfaced inside the framework view its auditor expects to see. The Statement of Applicability and the SOC 2 control matrix become two reports from one library.
| Annex A control | Topic | SOC 2 TSC |
|---|---|---|
| A.5.1 | Policies for information security | CC1.4, CC5.3 |
| A.5.15 | Access control | CC6.1, CC6.2, CC6.3 |
| A.5.17 | Authentication information | CC6.1, CC6.6 |
| A.5.23 | Cloud service security | CC3.4, CC6.6 |
| A.5.24 | Incident management planning | CC7.3, CC7.4, CC7.5 |
| A.6.3 | Awareness and training | CC1.4, CC2.2 |
| A.8.7 | Protection against malware | CC6.8 |
| A.8.16 | Monitoring activities | CC7.2, CC7.3 |
| A.8.24 | Use of cryptography | CC6.7 |
| A.8.28 | Secure coding | CC8.1 |
For a 50 to 500 employee company. Numbers below are pulled from public guidance issued by A-LIGN, AICPA, and independent platform reviews published 2024 through 2026, converted to first-year all-in spend.
| Line item | ISO 27001 (first year) | SOC 2 Type II (first cycle) |
|---|---|---|
| Consulting / gap analysis | $10K to $50K | $5K to $35K |
| Compliance tooling (annual) | $10K to $40K | $10K to $40K |
| Audit fees | $15K to $40K (Stage 1 + Stage 2) | $20K to $60K (Type II) |
| Internal time (hidden cost) | 300 to 600 hours | 250 to 500 hours |
| Total first-year, all in | $30K to $120K | $30K to $100K |
| Renewal year (typical) | $20K to $50K (surveillance) | $25K to $70K (annual Type II) |
Companies running ISO 27001 and SOC 2 from a shared control library typically spend $50K to $160K all-in for both in year 1, versus $60K to $220K if the two programmes are run separately. The overlap is the saving; the platform is what unlocks it.
Marketing pages promise 90 days. Reality is longer. Below are realistic ranges for a mid-sized company building the programme rather than buying the audit.
Whichever framework you start with, the next move is the same: a gap analysis against the standard you picked. RiskWatch ships pre-built libraries for both, plus the cross-mapping that lets you grow into the other without starting over.
Pre-built Annex A 2022 control library, Statement of Applicability generator, risk treatment workflow, ISMS internal audit module.
Open ISO 27001 hubTrust Services Criteria library, Common Criteria coverage, evidence collection workflow for the Type II observation window, auditor-ready exports.
Open SOC 2 hubSelf-assess against all 93 Annex A 2022 controls. Spot gaps before kickoff, prioritise remediation, and decide if you are 3 months or 9 months from Stage 2.
Get the ISO 27001 checklistSelf-assess against the Common Criteria plus the four optional Trust Services Categories. Score control design before the readiness assessment to save audit time.
Get the SOC 2 checklistTwelve questions that come up while choosing between (or running) both frameworks.
The same control library, pre-built Annex A 2022 and SOC 2 TSC libraries, automatic cross-mapping, and auditor-ready exports for both reports. 30-day free trial, no credit card.
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