Core51
Sub‑processors
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Sub‑processors

Last updated: 2026‑04‑23

Core51 uses third‑party service providers (“sub‑processors”) to help operate the Service. This page lists key sub‑processors and typical purposes. The list may change over time.

Key sub‑processors (typical)

  • Hosting / infrastructure: VPS or cloud compute providers used to run the API and website.
  • Object storage: storage providers used to store encrypted attachments and downloadable resources.
  • Email delivery: providers used to send verification and support emails.
  • Push notifications: Google Firebase Cloud Messaging (FCM) to deliver push notifications to Android devices (push tokens and delivery metadata).
  • Payments (if enabled): payment processors used to process transactions and manage subscriptions.
We aim to share only what is necessary for the relevant purpose and to apply contractual and technical safeguards where required.

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