AI SaaS subprocessor list template for OpenAI, Vercel, Stripe, Supabase, and PostHog
Many small AI SaaS teams already know they use these vendors. The hard part is turning that stack into a public subprocessor page that customers, procurement, and counsel can review without forcing the founder to explain the architecture from scratch.
This page helps organize vendor facts, update dates, and notice fields in a customer-readable format. Your agreements and counsel determine the final disclosures and notice steps.
Why the AI stack needs a more concrete template
Generic vendor lists tend to collapse important differences. An AI startup might list cloud hosting and payments, but skip the model provider, analytics, or support tools that buyers ask about first. That creates unnecessary back-and-forth during procurement and renewals.
A better page names the vendor, explains the purpose in plain English, shows what data categories may be involved, and gives customers a clear route for notice questions or objections.
Public fields to keep consistent
- Vendor name.
- Plain-language service purpose.
- Data categories that may be processed.
- Primary processing region or transfer context.
- Status such as active, planned, replacing, or removed.
- Effective date for planned or changed vendors.
- Page last updated date.
- Contact route for customer questions or objections.
Example vendor table for a small AI SaaS team
| Vendor | Purpose | Data categories | Region | Status |
|---|---|---|---|---|
| OpenAI | LLM inference for customer-facing product features | Prompts; generated outputs; account metadata | United States | Active |
| Vercel | Application hosting and edge delivery | Site requests; log metadata; deployment data | United States; global edge network | Active |
| Stripe | Payments and billing operations | Billing contact details; transaction metadata | United States; regional processing varies by account | Active |
| Supabase | Database, storage, and authentication | User records; application data; auth events | United States; European Union | Active |
| PostHog | Product analytics and feature usage measurement | User IDs; event metadata; product telemetry | United States; European Union | Active |
Use this as a public-facing simplification. Keep approval notes, reviewers, evidence links, and customer-segment logic in a private tracker.
Vendors AI founders most often forget to explain
The model provider
Founders often describe the feature but not the vendor behind it. Buyers usually want the LLM provider named directly.
Analytics and telemetry
Usage tools are common review questions because they may capture behavior, identifiers, or support context.
Support and messaging tools
Chat, email, and support vendors may touch customer communications even if they are not part of the product workflow itself.
Status and change history
Without a visible update date and internal page archive, a customer cannot tell whether the list reflects the current production stack.
What to keep private
The public page should stay readable. The operational detail belongs in your internal tracker so the founder, operator, or attorney can review the workflow without overpublishing system detail.
- Customer segment affected by the change.
- Notice date and objection deadline.
- Internal reviewer, owner, and approval date.
- Evidence links for screenshots, notice email, or ticket IDs.
- Open legal, procurement, or transfer questions.
Turn this into a live page in one short pass
- Replace each example row with the vendors that are active in production now.
- Normalize the service purpose and data-category wording so repeated tools use the same language.
- Add the page last-updated date and the contact route customers should use for notice questions.
- Mark any pending vendor as planned until the internal review and notice timing are complete.
- Keep your objection deadline, reviewer notes, and proof links in a private tracker instead of the public page.
If the page still feels too generic after that pass, route the same inputs into the checker, review brief, or teardown so the next revision is grounded in one concrete workflow.
Download the sample CSV
If you want a faster starting point, use the sample file below and adapt the rows to your current stack before changing the public page. If you want a teardown or tier recommendation right after that, use the download-section CTAs so the follow-through stays attributable.
Related tools for AI-stack cleanup
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Open disclosure packet guideDraft the customer-facing notice
Use the generator when the missing piece is the outbound copy, effective date, or objection-window language.
Open generatorUse an AI-specific notice template
Use the AI notice guide if the hard part is explaining the model, hosting, analytics, or billing vendor change in cleaner customer-facing language.
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Use the self-audit if the operational steps still feel shaky even after the public list is cleaned up.
Run self-auditPackage the handoff for review
Use the brief builder when the founder, operator, advisor, or attorney needs one tight note instead of a long email thread.
Open brief builderCheck the live page, not just the template
Use the checker or the teardown when you already have a public URL and need the bluntest possible gap read.
Need a blunt read on your current page?
Send one live URL, one planned vendor change, and one affected customer segment. NoticeKit can reply with a short async gap note before you buy a kit.