Subprocessors
Effective October 9, 2026 · Last reviewed October 9, 2026
ChairSlay uses these subprocessors to deliver the Service. Each is bound by a data-processing agreement and processes personal data only on our documented instructions.
Current subprocessors
| Subprocessor | Purpose | Location |
|---|---|---|
| Hetzner Cloud (Hetzner Online GmbH) | Application servers and database | Ashburn, VA, USA |
| Stripe, Inc. | Client card payments via Stripe Connect (when you choose Stripe), and billing for your ChairSlay plan, including sales tax | USA |
| Block, Inc. (Square) | Client card payments via Square OAuth (when you choose Square) | USA |
| Postmark (ActiveCampaign, Inc.) | Transactional email (sign-in links, booking confirmations, reminders, plan and billing notices, waitlist replies) | USA |
| Twilio, Inc. | SMS booking reminders (opt-in per pro) | USA |
| Sentry (Functional Software, Inc.) | Error reporting + performance monitoring | USA |
| Cloudflare, Inc. | DNS + CDN for chairslay.com (marketing pages, booking-link forwarding); waitlist sign-ups on chairslay.com; cookieless page-view analytics for the marketing site; R2 storage for photos, book downloads, and encrypted database backups | Anycast edge; R2 storage |
| Google LLC | Google Calendar sync (when you connect Google Calendar); notifications to the Android app; transaction reports to Google Play for plans chosen in the Android app | USA |
| Microsoft Corporation | Microsoft 365 / Outlook calendar sync (when you connect) | USA |
| Apple Inc. | Notifications to the iPhone and iPad app | USA |
The calendar providers receive only what we describe in the Privacy Policy §2: we read the start and end times of your events (titles, attendees, and descriptions aren’t read), and appointments we add to your calendar show the service name and time, never the client’s name. App notifications are generic and never include a client’s name.
Notification of changes
We’ll update this page and notify pros by email at least 15 days before any material subprocessor addition. “Material” means any change that increases the categories of personal data shared, or moves data to a new region. Operational replacements with equivalent scope (e.g., switching error-monitoring providers) we may make without notice but will still update this page promptly.