Service Providers
Last updated: September 28, 2026
These are the companies that receive personal information so we can run Koutei PDF. Our Privacy Policy explains why we collect it and how long we keep it.
1. Providers we use today
Supabase
- What for
- Sign-in and our database
- What it receives
- Account details, sign-in records, credit balance, plan and payment records, billing notifications from Paddle, API key hashes, and the free invoice generator’s limit counters (a keyed hash of an IP address, never the address)
- Where
- EU West (Ireland, eu-west-1)
- Role
- Processes data on our behalf (processor)
Vercel
- What for
- Hosts the website and its server code
- What it receives
- Every web request, including the document details you submit (passed through, not stored); request logs with IP address and browser details
- Where
- US East (Washington, D.C., iad1), with a global edge network
- Role
- Processes data on our behalf (processor)
Railway
- What for
- Hosts the engine that renders your PDFs and images
- What it receives
- The document details you submit, only while the document is rendered; logs without document content
- Where
- US West (California)
- Role
- Processes data on our behalf (processor)
Paddle
- What for
- Merchant of record: checkout, payments, tax, invoices, receipts and refunds
- What it receives
- Your email address and account ID from us; the payment, address and tax details you give Paddle at checkout
- Where
- United Kingdom, with global processing
- Role
- Uses data under its own privacy policy (independent controller)
Resend
- What for
- Sends sign-up confirmation, sign-in link and password reset emails
- What it receives
- Your email address and the email we send you
- Where
- United States
- Role
- Processes data on our behalf (processor)
Google (Sign in with Google)
- What for
- Lets you sign in with your Google account, if you choose to
- What it receives
- Google shares your name, email address, profile picture and Google account ID with us
- Where
- Global
- Role
- Uses data under its own privacy policy (independent controller)
Google Workspace
- What for
- Our business email, for support and privacy requests
- What it receives
- Emails you send us and our replies
- Where
- Global
- Role
- Processes data on our behalf (processor)
2. Changes to this list
We update this page before we start using a new provider that will receive personal information. If you have a business agreement with us that requires notice, we will also tell you directly. Questions: privacy@kouteisystems.com.