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OneStream Software

UK GDPR evidence

OneStream Software provides a revolutionary corporate performance management (CPM) solution that unifies and simplifies financial

onestream.comFinance and accountingLast verified 21 Sep 2026
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UK GDPR, with the Data Protection Act 2018

OneStream Software against UK GDPR’s vendor requirements

4 provisions of UK GDPR reach the vendors you rely on. For each, the public evidence from OneStream Software that may support it, with its date and source.

3 evidence found1 no public evidence
Article 28(1)

Use processors that provide sufficient guarantees

A controller shall use only processors providing sufficient guarantees to implement appropriate technical and organisational measures.

Evidence found

  • Independent security assurance

    Evidence found

    A current SOC 2 report or ISO/IEC 27001 certificate is the usual evidence that a supplier operates appropriate security measures.

    • SOC 2Vendor states SOC 2 TYPE II on its trust centreas of 21 Sep 2026
    • ISO/IEC 27001Vendor states ISO 27001:2022 on its trust centreas of 21 Sep 2026
    • CSA STARSTAR Level 1 self-assessment (CAIQ)as of 17 Sep 2026
    • ISO certificate"OneStream Software LLC - ISO 27018 Certificate" on the trust centreas of 21 Sep 2026
    • and 3 more

  • Security testing and documentation

    Evidence found

    A penetration test report, a completed standard questionnaire (SIG, CAIQ, HECVAT) or security documentation shows how the supplier tests and runs its controls.

    • Security questionnaire (SIG, CAIQ, HECVAT)"2025 OneStream CSA STAR Level 1 CAIQ v4.0.3" on the trust centreas of 21 Sep 2026
    • Penetration testing"Does OneStream conduct penetration tests?" OneStream engages an independent 3rd party to perform regular penetration testing against a "like customer" environment. An executive summary of Penetration Test results is made available to customers via OneStream's...as of 21 Sep 2026
    • Penetration testingPenetration testing: annualas of 21 Sep 2026
    • Penetration test report"2025 Platform Next-Gen Penetration Test Report" on the trust centreas of 21 Sep 2026
    • and 4 more
Article 28(3)

Put processing under a written contract

Processing by a processor must be governed by a contract with the terms Article 28(3) lists, including documented instructions, confidentiality, security and assistance.

No public evidence

  • Data processing agreement

    No public evidence

    The DPA is where processing instructions, confidentiality, security, sub-processing and audit rights are written down.

Article 28(2) and (4)

Know and control sub-processors

Sub-processors need the controller’s authorisation, changes must be notified, and obligations flow down by contract.

Evidence found

  • Published subprocessor list

    Evidence found

    A current list of subprocessors, with purpose and location, is how a customer knows who else touches its data.

Articles 44 to 46

Transfer data outside the UK lawfully

Restricted transfers need UK adequacy regulations (including the UK Extension to the EU-US Data Privacy Framework) or appropriate safeguards such as the International Data Transfer Agreement or the UK Addendum to the EU SCCs.

Evidence found

  • Transfer mechanism

    Evidence found

    Transfers outside the EU or UK need a basis such as an adequacy decision (including the EU-US Data Privacy Framework) or standard contractual clauses.

  • Where data is hosted and processed

    Evidence found

    The regions or countries where the service runs and data is stored, from the vendor or its subprocessor list.

    • Where data is hosted or processed"Where can I find OneStream's Data Processing Terms?" OneStream's Data Processing Terms can be found on OneStream's Commercial Terms and Conditions site here.as of 21 Sep 2026
    • Where data is hosted or processed"Where are OneStream services geographically hosted?" Data center locations for OneStream can be found here.as of 21 Sep 2026
    • Where data is hosted or processed"Where are OneStream AI Services hosted?" AI services made available to each customer are hosted in the data center agreed by the parties in their signed agreement.as of 21 Sep 2026
    • Subprocessor locations7 of 7 subprocessors list a locationas of 21 Sep 2026

Questions buyers ask

Is OneStream Software UK GDPR compliant?

CertReports does not decide that. It shows the public evidence that may support each UK GDPR requirement that reaches vendors: evidence was found or is available on request for use processors that provide sufficient guarantees (Article 28(1)), know and control sub-processors (Article 28(2) and (4)), transfer data outside the uk lawfully (Articles 44 to 46), and nothing public was found for put processing under a written contract.

What should I ask OneStream Software for?

Request data processing agreement, and confirm each is current.

Reading for UK GDPR reviews

All articles

This maps third-party obligations to the vendor evidence that may support them. It is not legal advice and never a statement that a vendor or its customers comply; confirm scope and sufficiency with your counsel or auditor. “No public evidence” means nothing public was found at the last check. Citations link to the official text.

Requirements reviewed 21 Sep 2026. The vendor lists the evidence on its trust centre behind a request or NDA; ask for it.