Subprocessors
Last updated: 2026-04-16
A subprocessor is a third-party service we use to help operate the platform. We engage the following subprocessors and hold a written agreement (Data Processing Addendum or equivalent) with each, requiring them to protect personal information to a standard consistent with applicable privacy law.
We will update this page before adding or changing a subprocessor that handles personal information. If you have subscribed to notifications, we will also email registered Company administrators of material changes.
| Subprocessor | Purpose | Location | Data categories |
|---|---|---|---|
| Supabase (AWS) | Database, authentication, file storage, realtime | Japan (AWS ap-northeast-1, Tokyo) | Account info, bookings, transactions, audit logs, uploaded files |
| Stripe | Payment processing and Stripe Connect | United States / global (per Stripe region policy) | Payment amount, currency, email, charge identifiers (no card data on our servers) |
| Resend | Transactional email delivery (default provider) | United States | Recipient email, name, booking / membership / gift card details in email body |
| Amazon SES | Transactional email delivery (optional provider) | Per configured AWS region | Recipient email, name, booking / membership / gift card details in email body |
| RemoteLock | Physical lock access provisioning (where a Company has enabled it) | United States | User name, booking window, access PIN |
| Vercel | Application hosting / edge network | Global edge; primary compute region co-located with database where possible | Request metadata only; no persistent user data |
| Sentry | Error monitoring and performance telemetry | United States (unless EU region selected) | Error stack traces, request metadata, user identifier (not booking content) |
| Anthropic (Claude) | AI chatbot addon (only when a Company enables it) | United States | Chat messages submitted to the Company's chatbot |
Questions
For questions about a specific subprocessor or to request a copy of the relevant Data Processing Addendum, email privacy@letbook.ai.