Subprocessors
Effective date: April 17, 2026
Last updated: April 17, 2026
ZPresso LLC uses the following third-party service providers (sub-processors) to deliver the OneSignservice. Each is bound by written contract, confidentiality obligations, and appropriate data-protection terms. This list is maintained in accordance with Article 28(2)–(4) GDPR and our Data Processing Agreement.
Current sub-processors
| Provider | Purpose | Data location |
|---|---|---|
| Railway Corp. railway.com | Application hosting and managed PostgreSQL database | United States |
| Namecheap, Inc. www.namecheap.com | Domain registration and DNS | United States |
| Email delivery provider (SMTP) | Transactional email delivery for signing invitations, notifications, and account emails | To be confirmed based on chosen provider |
Notifications of changes
We will update this page at least 30 days before adding or replacing a sub-processor that processes Customer Personal Data. Business customers can subscribe to email notifications of sub-processor changes by writing to privacy@onesign.clickwith the subject “Subscribe — Subprocessor updates”.
Objecting to a new sub-processor
Customers bound by our DPA may object to the appointment of a new sub-processor on reasonable data-protection grounds within 30 days of notice, as described in Section 6 of the DPA.
Personal data you may ask about
If you would like more detail about the specific categories of Customer Personal Data that each sub-processor can access, or the safeguards applicable to an international transfer, email privacy@onesign.click.