Legal
Sub-processors
The providers that help operate Keisan: hosting, the database, billing, email and the AI models that draft estimates.
Last updated · October 27, 2026
Overview
This page lists the third-party providers that process customer data to help Jishu Labs LLC operate Keisan, with the purpose of the processing and the region where it mainly takes place.
Current sub-processors
- SupabaseAuthentication, the PostgreSQL database and application storage for briefs and estimates.United States
- StripeSubscription billing and payment processing for Pro plans.United States
- AnthropicAI model processing to draft estimates from your briefs.United States
- OpenAIAI model processing to draft estimates from your briefs.United States
- NetlifyHosting, deployment and production web infrastructure.United States
- ResendTransactional email, such as account notices and contact form messages.United States
- PostHog, Inc.Product analytics and session replay.United States
Data categories
Depending on the features you use, sub-processors may process account identifiers, email addresses, submitted briefs, estimates, billing metadata, usage data, logs and the support context needed to provide the Service.
No model training
Briefs and estimates sent to our AI sub-processors are used only to produce your results. They are not kept for, or used to train, the providers' models.
Changes to sub-processors
We may update this list as the Service changes. Material changes will appear on this page and, where a customer agreement requires it, be announced through the agreed notice process.
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