Last updated: September 18, 2026
Eturns uses the following subprocessors to provide the Services. We disclose them publicly so merchants and customers can review where data is processed before they install Eturns. Everything Eturns persists is stored by Supabase in Mumbai, India; the application and its queue run on Render in Singapore. See section 5 of the Privacy Policy and the Data Processing Agreement at /policy/dpa for what that means for international transfers.
| Processor | Region | What we send | DPA |
|---|---|---|---|
| Vercel AI Gateway | Global | Decision context (no PII — sentinel IDs and structured fields) | Vercel DPA |
| xAI / OpenAI / Google | Global (via Gateway) | Same as above — routed by Vercel AI Gateway | Routed by Gateway |
| Supabase | India — AWS ap-south-1 (Mumbai) | Full app data under RLS; photo evidence in private buckets | Supabase DPA |
| Render | Singapore | App hosting, background worker, and Redis counters + session IDs (no PII) | Render DPA |
| Resend | Global | Recipient email + body for the single send call | Resend DPA |
| Sentry | United States | Stack traces + scrubbed extras | Sentry DPA |
| PostHog | United States | Event properties (PII-scrubbed before send) | PostHog DPA |
| Shopify | Global | Shopify-internal — Admin API, Billing, webhooks | Shopify Partner Agreement |
Eturns never calls model vendors directly. All model traffic goes through the Vercel AI Gateway. The current registry routes: - Medium/high decisions and vision primary to xAI Grok 4.5 - Low-complexity decisions and triage to OpenAI GPT-5.4 Mini (with GPT-5.4 Nano as first failover) - Vision failover to Google Gemini 3.5 Flash The authoritative model list lives in app/lib/ai/models.ts in the Eturns application and is mirrored in docs/07-AI-ARCHITECTURE.md. If we add or change a model vendor, we update this page.
We will post a new or changed subprocessor on this page at least 30 days before it starts processing customer data, and we will email the address on file with Shopify. Watch this page or email contact@eturns.app if you want another path.
Questions about this policy? Email contact@eturns.app.