Privacy

Kasti is a place to capture your thoughts and find how they connect. This page explains what happens to your data. Last updated November 1, 2026.

What we collect

Your account details: your email address and, if you sign in with Google or GitHub, the basic profile those services share, such as your name and picture.
What you write: the thoughts and notes you save or import, the connections Kasti suggests, and how you respond to them.
Usage records, such as how many thoughts were processed, so we can run plans and limits.
Payment status if you subscribe. Stripe handles your card details; we don't see or store them.

To store your thoughts and show them back to you.
To sort your thoughts into topics, find connections and search them. Passages of your notes are sent to AI providers to do this.
Every AI request asks for zero data retention, and providers that can't offer it aren't used. That rules out training AI on your notes. Under these terms a provider may still keep limited data for safety checks.
To sign you in, run your subscription, and keep the service working and within its limits.
We don't sell your data and we don't show ads.

Clerk: sign-in and accounts.
Stripe, through Clerk Billing: payments.
Neon: the database that stores your thoughts.
Vercel: hosting, and the AI Gateway that routes requests to AI providers.
AI providers, reached through Vercel: OpenAI models, which may run on Microsoft Azure, and Anthropic models, which may run on Amazon Web Services or Google Cloud. They process passages of your notes.

You can export your thoughts at any time from your You page.
When you import notes, you pick which ones come in. The rest stay on your device. We don't connect to Apple Notes or any other notes app.
You can delete any thought from its page. That removes it and its connections, along with any insight based on it. Copies in database backups expire on their own.
To delete your account and all your thoughts, email berny@webshinobi.com.
If you connect Kasti to an AI tool over MCP, that tool can read and add thoughts on your behalf until you revoke its access.