SOC 2 vs ISO 27001: Which Should an Indian SaaS Company Do First?
A plain comparison of SOC 2 and ISO 27001 for SaaS companies: who asks for which, how the audits differ, where the controls overlap and how to sequence them.
The SOC 2 vs ISO 27001 choice mostly comes down to who your buyers are. SOC 2 is an attestation report that US customers usually ask for. ISO 27001 is an international certification that European, Middle Eastern and Asian buyers tend to prefer. The controls overlap heavily, so an Indian SaaS company selling to both can build one programme and satisfy each.
This guide explains what each one is, where the work overlaps and how we would sequence them. This is general information, not legal or audit advice, so confirm specifics with your auditor or certification body.
What SOC 2 is
SOC 2 is a reporting framework created by the AICPA, the American body for certified public accountants. An independent CPA firm examines your controls against the Trust Services Criteria and issues a report describing your system, your controls and the auditor's opinion on them.
There are five criteria categories: security, availability, processing integrity, confidentiality and privacy. Security is always in scope. The others are optional, and you add them when your customers or contracts need them. Most SaaS companies start with security alone, or security plus availability and confidentiality.
The important point is that SOC 2 is an attestation, not a certification. Nobody "passes" SOC 2. You receive a report, usually shared with customers under NDA, and each customer reads it and decides whether your controls are good enough for them.
SOC 2 Type 1 vs Type 2
A Type 1 report looks at whether your controls are suitably designed at a single point in time. It is quicker to obtain and useful as an early signal to buyers that you are serious.
A Type 2 report looks at whether those controls actually operated effectively over a period, commonly somewhere between three and twelve months. This is what most enterprise security teams ultimately want, because it shows sustained behaviour rather than a snapshot. Many companies get a Type 1 to unblock early deals, then move to Type 2 and renew it every year.
What ISO 27001 is
ISO/IEC 27001 is an international standard for an information security management system (ISMS). Rather than examining a fixed set of controls, it asks you to run a management system: define a scope, assess your risks, choose controls to treat them, and review and improve the whole thing on a cycle.
The standard includes a reference list of controls in Annex A, covering organisational, people, physical and technological areas. You document which controls apply to you, and why, in a Statement of Applicability. Leadership commitment, internal audits and management reviews are part of the requirement, not optional extras.
ISO 27001 leads to certification. An accredited certification body audits you, usually in two stages (a documentation review, then an audit of how the ISMS works in practice), and issues a certificate if you meet the standard. The certificate typically runs for three years, with surveillance audits in between and a recertification audit at the end.
SOC 2 vs ISO 27001: the comparison
The table below sets out the practical differences. It is a summary, so check details with the firm you engage.
| Factor | SOC 2 | ISO 27001 |
|---|---|---|
| Origin | AICPA, United States | ISO and IEC, international |
| Outcome | Attestation report with an auditor's opinion | Certificate from a certification body |
| Who performs it | Licensed CPA firm | Accredited certification body |
| Focus | Whether specific controls are designed and operating | Whether you run a risk-based management system |
| Flexibility | You choose which criteria categories are in scope | You set the ISMS scope and select controls by risk |
| Typical buyers asking | US enterprises and US-based security teams | European, UK, Middle Eastern and Asian enterprises, public sector |
| How it is shared | Detailed report, usually under NDA | Certificate, often public, with scope stated |
| Ongoing cycle | Type 2 report renewed each year | Annual surveillance audits, recertification every three years |
Neither is "better". SOC 2 tells a customer how your controls behaved. ISO 27001 tells a customer that you run security as a managed, improving discipline.
Who asks for which
In our experience, the request usually arrives in a security questionnaire or a procurement checklist, and the wording gives it away.
- US mid-market and enterprise buyers most often ask for a SOC 2 Type 2 report. Some will accept ISO 27001, but many procurement teams are set up to review SOC 2 reports specifically.
- European and UK buyers more commonly ask for ISO 27001, and may also ask how you handle GDPR obligations, which neither standard covers on its own.
- Buyers in the Gulf, Singapore and Australia often recognise ISO 27001 readily, alongside local requirements in regulated sectors.
- Indian enterprises and regulated entities frequently ask for ISO 27001, and banks and NBFCs may add their own vendor risk assessments and audit rights on top.
If you are unsure, reread the last ten security questionnaires you received.
Where the controls overlap
The good news is that most of the underlying work is shared. Both frameworks expect you to have:
- Access control with least privilege, joiner and leaver processes and periodic access reviews
- Multi-factor authentication and strong identity management
- Change management, including code review and controlled deployments
- Logging, monitoring and incident response with a tested plan
- Vendor and third-party risk management
- Encryption of data in transit and at rest, with key management
- Backups, business continuity and disaster recovery testing
- Security awareness training and background checks where lawful
- Asset inventory and vulnerability management
As a rough guide, once one framework is in place, a large share of the evidence carries over to the other. The extra work for ISO 27001 is mostly in the management system: risk methodology, Statement of Applicability, internal audit and management review. The extra work for SOC 2 is mostly in proving that controls operated consistently over the audit period, with evidence for samples the auditor picks.
Which to do first for an Indian SaaS company
For an Indian SaaS company selling to both the US and Europe, there is no single right answer, but the decision usually follows revenue.
Start with SOC 2 if most of your near-term pipeline is in the US, deals are stalling at security review, and US buyers are explicitly asking for a SOC 2 report. A Type 1 can unblock conversations while your Type 2 observation period runs.
Start with ISO 27001 if your pipeline is weighted towards Europe, the UK, the Middle East or Indian enterprises, or if you want a management system that will scale with the company and support other frameworks later.
Plan for both if you sell in both regions. Build one control set mapped to both frameworks from the start. Use a single policy library, a single risk register and a single evidence store. Then sequence the audits so that work done for the first is reused for the second.
Whatever you pick, design your controls so they work in your real engineering process. A change management control that lives in a spreadsheet nobody updates will fail a Type 2 period. One that is enforced by your CI/CD pipeline, with branch protection and recorded approvals, produces evidence on its own. The same goes for access, logging and backups defined in code.
What drives timeline and cost
We will not quote a number here, because it varies too much by scope. The main drivers are:
- Scope: how many products, environments, offices and teams are in scope. Narrow, well-defined scope is cheaper and faster.
- Starting maturity: whether you already have MFA everywhere, infrastructure as code, centralised logging and written policies.
- Audit period: for SOC 2 Type 2, the observation window you choose sets a minimum timeline.
- Criteria and controls in scope: adding availability, confidentiality or privacy to SOC 2, or a broader ISMS scope for ISO 27001, adds work.
- Auditor or certification body: fees and approach vary between firms.
- Tooling and ownership: automation platforms reduce evidence effort, but a named owner with time to drive the programme matters more.
A readiness checklist
Work through this before you engage an auditor. If you cannot tick most of it, spend a few months on readiness first.
- Define scope: which product, cloud accounts, teams and locations are in and out.
- Name an owner: one person accountable for the programme, with leadership backing.
- Write core policies: information security, access control, acceptable use, incident response, vendor management, data retention.
- Run a risk assessment: list assets, threats and risks, and decide how each is treated.
- Enforce MFA and SSO for every system that touches customer data.
- Review access: remove stale accounts and set a recurring review.
- Lock down change management: protected branches, mandatory review and logged deployments.
- Centralise logs and alerts, and write an incident response plan you have actually tested.
- Inventory vendors and assess the critical ones.
- Test backups and recovery, and keep the evidence.
- Train everyone on security basics and record completion.
- Pick your auditor or certification body and agree scope in writing.
Frequently asked questions
Is SOC 2 or ISO 27001 harder?
They are hard in different ways. ISO 27001 asks more of your management system, such as risk methodology, internal audits and leadership reviews. SOC 2 Type 2 asks you to prove controls worked consistently across a period, which exposes any gaps in day-to-day discipline.
Can ISO 27001 replace SOC 2 for US customers?
Sometimes. Some US buyers accept an ISO 27001 certificate, especially with a good security questionnaire response. Many larger US procurement teams still specifically request a SOC 2 report, so check with your actual prospects before relying on it.
What is the difference between SOC 2 Type 1 and Type 2?
Type 1 assesses whether your controls are suitably designed at a single point in time. Type 2 assesses whether they operated effectively over a period, often several months to a year. Enterprise buyers usually want Type 2.
Do we need both SOC 2 and ISO 27001?
Only if your customers ask for both. Companies selling across the US and Europe often end up with both, and building one control set mapped to each keeps the extra effort manageable.
Can Sunday Labs certify us?
No. Sunday Labs is not a certification body or a CPA firm, and we do not issue certificates or reports. We help you get ready: scoping, policies, technical controls, evidence collection and working alongside your chosen auditor.
How Sunday Labs can help
Sunday Labs helps SaaS companies prepare for SOC 2 and ISO 27001 through our security and compliance service. Senior engineers build the controls into your cloud and delivery pipeline so evidence comes from how you work, and a founder reviews progress every week. We work alongside your independent auditor or certification body rather than replacing them. If security reviews are slowing your deals, start a conversation and we will help you scope the right first step.
