Subprocessors
Last updated: 24 October 2026
Who helps us run Rukh, what each one does with your data, and where.
1. Providers that process data for us
These providers handle personal data on our behalf, only to provide their service to us. See the Privacy Policy for why we use your data and your rights.
| Provider | What it does | Data involved | Where |
|---|---|---|---|
| Dodo Payments | Merchant of record: takes payment, issues invoices, handles tax and refunds, runs the customer portal. | Name, email, billing details, payment method, subscription status. | Provider's own infrastructure; see its privacy policy. |
| Vercel | Hosts the website and the free preview. | IP address and request logs, preview usernames. | Global edge network, United States. |
| Cloudflare | Hosts the coach's servers and per-user database. | Account and coaching data (when the paid coach opens), IP address. | Global network. |
| Amazon Web Services (DynamoDB) | Stores the waitlist. | Email, sign-up page and time, chess.com username if given. | The AWS region we configure. |
| PostHog | Cookieless website analytics and feature flags. | Page views, clicks, errors, approximate location from IP, browser and device type. No email. | PostHog US Cloud, United States. |
| OpenAI | AI model that writes the coach's replies and, with voice, understands speech. | Chess positions, conversation text, and voice audio if you use voice. No email address. | United States. |
| Upstash (when enabled) | Temporary preview cache and per-IP request counters. | Chess.com usernames, IP address for about an hour. | Region we configure. |
| Email provider (Amazon SES planned) | Sends waitlist, trial and billing emails once enabled. | Email address and message content. | To be stated here when enabled. |
Dodo Payments
What it does: Merchant of record: takes payment, issues invoices, handles tax and refunds, runs the customer portal.
Data involved: Name, email, billing details, payment method, subscription status.
Where: Provider's own infrastructure; see its privacy policy.
Vercel
What it does: Hosts the website and the free preview.
Data involved: IP address and request logs, preview usernames.
Where: Global edge network, United States.
Cloudflare
What it does: Hosts the coach's servers and per-user database.
Data involved: Account and coaching data (when the paid coach opens), IP address.
Where: Global network.
Amazon Web Services (DynamoDB)
What it does: Stores the waitlist.
Data involved: Email, sign-up page and time, chess.com username if given.
Where: The AWS region we configure.
PostHog
What it does: Cookieless website analytics and feature flags.
Data involved: Page views, clicks, errors, approximate location from IP, browser and device type. No email.
Where: PostHog US Cloud, United States.
OpenAI
What it does: AI model that writes the coach's replies and, with voice, understands speech.
Data involved: Chess positions, conversation text, and voice audio if you use voice. No email address.
Where: United States.
Upstash (when enabled)
What it does: Temporary preview cache and per-IP request counters.
Data involved: Chess.com usernames, IP address for about an hour.
Where: Region we configure.
Email provider (Amazon SES planned)
What it does: Sends waitlist, trial and billing emails once enabled.
Data involved: Email address and message content.
Where: To be stated here when enabled.
2. Data source, not a processor
chess.com is where we read public game data from, using its public API by username. It does not process data for us and we send it nothing but the username in the request. Rukh is not affiliated with chess.com.
3. Changes to this list
We update this page when we add or replace a provider and change the date at the top. For a material change, such as a new provider receiving coaching data, we email subscribers first. To be told about changes, or to object, email support@rukh.cc (opens in a new tab).