---
title: Subprocessors and where your data goes
description: "Who handles your data: the hosted test runs at app.tansohq.com, this website, and self-hosted tanso-oss."
date: 2026-10-06
---

> Full site context for agents: https://tansohq.com/llms.txt

# Where your data goes

Self-hosted tanso-oss keeps your data on your own infrastructure. Hosted test runs at app.tansohq.com use the providers listed below.
Last updated October 6, 2026.

## Your Tanso instance

The engine runs on your infrastructure and has no hosted data plane. There is
nothing for us to subprocess.

| Service | Purpose | When |
|---|---|---|
| Your infrastructure | Everything. Customers, usage, billing state, and keys live in your database. | Always |
| Stripe | Payment collection and saved payment methods. | Only if you enable the Stripe adapter |

## agent-ready hosted test runs

Hosted runs at app.tansohq.com are a service we operate, so these providers handle
your data when you use them.

| Service | Purpose |
|---|---|
| Vercel | Hosting for app.tansohq.com and the scheduled worker that runs tests. |
| Supabase | Database: workspaces, products, tests and their results, purchase records. |
| Clerk | Sign-in for people who own workspaces. |
| OpenAI | The model that drives the hosted test agent. It sees the product pages, docs and task for the run. |
| AgentMail | A throwaway inbox for each run, so the agent can receive the product's signup emails. When you turn on alert emails for a test, it also sends them from "Tanso alerts" to your verified sign-in email. |
| Stripe | Payment for hosted test runs and the saved card. We keep only the last four digits. |

## This website

tansohq.com is a marketing site. It never sees your Tanso instance's data.

| Service | Purpose |
|---|---|
| Vercel | Hosting, edge middleware, and performance analytics. |
| PostHog | Conversion and error events. No session recording, no autocapture. |
| Reddit | Ad attribution pixel. |
| Fontshare | Font delivery (Satoshi). |
| Cal.com | Demo scheduling, only when you book a call. |

Questions: kat@tansohq.com

More for agents: https://tansohq.com/llms.txt