GDPR for SaaS Startups: The Minimum You Need on Day One
A SaaS startup usually wears two GDPR hats at once: controller for its own customers and staff, and processor for the data customers put into the product. Here is the minimum to have in place, with links to the detailed guides.
Your two roles
| Role | For which data | Main duties |
|---|---|---|
| Controller | Your website visitors, leads, customer contacts, billing data, employees | Legal basis, privacy notice, records, rights, security, breach notification |
| Processor | The personal data your customers store or process in your product | Act only on customer instructions, sign a processing agreement, secure the data, help customers with their duties, manage sub-processors |
Getting this split right shapes every document below. Under Article 28(10), a processor that starts deciding purposes and means for customer data becomes a controller for that processing, with all the duties that brings.
The six documents customers and investors will ask for
| Document | Why | Guide |
|---|---|---|
| Privacy notice | Articles 13 and 14: what you tell people about your own processing | Privacy notice checklist |
| Records of processing | Article 30: one for your controller activities, one for your processor activities | RoPA guide |
| Data processing agreement (DPA) | Article 28: your customers need one with you; you need one with each sub-processor | DPA checklist |
| Sub-processor list | Article 28(2): customers must authorise sub-processors and be able to object to changes | Keep it public and dated |
| Security overview | Article 32 and customer due diligence | Questionnaire guide |
| Breach procedure | Articles 33 and 34; and as a processor, notify customers without undue delay | Breach notification guide |
Security that matches the risk
Article 32 requires appropriate technical and organisational measures, considering the state of the art, cost and the risks, including as appropriate:
- pseudonymisation and encryption of personal data;
- ongoing confidentiality, integrity, availability and resilience of systems;
- the ability to restore data in a timely manner after an incident;
- regular testing and evaluation of the measures' effectiveness.
For a startup that usually means multi-factor authentication everywhere, encryption, least-privilege access to production, logging, tested backups and a penetration test before the first enterprise deal.
Other questions that come up early
- Do we need a DPO? Only if your core activities involve regular and systematic monitoring of people on a large scale, or large-scale processing of special categories or criminal data, or you are a public body (Article 37(1)). Most early-stage B2B SaaS companies do not; document the assessment.
- We are outside the EU. If GDPR applies to you because you offer services to people in the EU or monitor their behaviour, you generally need a representative in the EU, unless your processing is occasional and low-risk (Article 27).
- Our stack is in the US. Check each provider's Data Privacy Framework certification or use standard contractual clauses. See EU-US data transfers.
- Do we need a DPIA? For high-risk processing, such as large-scale profiling, monitoring or sensitive data, yes (Article 35). See our DPIA guide.
- Cookies on the marketing site. Non-essential cookies need consent. See cookie banner requirements.
A 30-day plan
- Week 1: map your data and roles, list sub-processors, decide your legal bases.
- Week 2: publish the privacy notice and sub-processor list; sign DPAs with your sub-processors.
- Week 3: prepare your customer DPA and a one-page security overview.
- Week 4: write the records of processing, the breach procedure and a data subject request process; set retention periods.
Check your baseline: the free GDPR Compliance Checklist and Privacy Policy Generator cover the first two weeks.
The documents, ready to adapt. The GDPR RoPA Kit covers your records of processing for both roles, and the Vendor Security Assessment Pack includes a data processing agreement template.
Sources
Related tools
Further reading: Cybersecurity Checklist for Startups · GDPR DPA Checklist
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This article is for informational purposes only and does not constitute legal advice. Last updated: October 2026.