Compose · Legal
Subprocessors
Last updated August 20, 2026
To provide Compose, Flow State Automation LLC uses the third-party service providers below to process data on our behalf. Each is bound by contractual confidentiality and security obligations and processes data only to deliver its part of the Service. Under our agreements, your content is not used to train these providers’ models.
| Provider | Purpose | Data processed | Region |
|---|---|---|---|
| Supabase | Authentication, Postgres database, and file storage for your account and content. | Account email, your questions/materials/tests, uploaded files. | United States |
| Vercel | Application hosting and serverless compute that runs the Service. | Request metadata and logs; content in transit while a request is served. | United States |
| Anthropic | AI processing: reading your PDFs and answer sheets, rewording variations you review, re-checking answer keys, and drafting sub plans, lesson plans and proposed verdicts on written answers. | The specific question text, PDF pages, or images you submit for an AI operation. | United States |
| Stripe | Subscription billing and payment processing. | Your email and payment details (entered directly with Stripe), subscription status. | United States |
| Meta Platforms | Advertising measurement on our public marketing and sign-up pages only — so we can tell which ads bring teachers to Compose. Never active inside the app. | Page visits on public pages, and — when you create an account or subscribe — a one-way encrypted (hashed) form of your email address so the sign-up can be matched to an ad. Your questions, tests, materials and student data are never sent. | United States |
Changes
We may add or replace subprocessors as the Service evolves. We will update this page when the list changes. For questions, contact admin@fsautomation.ai.