Privacy
Effective October 2026 · No accounts, no cookies, no tracking
The short version
Castle has no accounts, sets no cookies, runs no ads and no third-party trackers, and doesn't sell or share personal data.
Your workspace stays in your browser
Your watchlist, notes, saved views, deal books, columns and display settings are stored only in your browser's local storage. They are never sent to Castle's servers, so they don't follow you to another device, and clearing this site's data in your browser deletes them.
Search happens on your device
Searching for companies, deals and banks runs in your browser over data it has already loaded; your searches aren't sent anywhere.
What the hosting provider sees
Castle is hosted on Vercel. Like any website host, Vercel processes standard request information (such as IP address, browser type and the pages requested) to deliver the site and protect it from abuse, under its own privacy policy. Castle doesn't use this information to identify visitors.
Links to other sites
Links to SEC filings and other sources open those sites, which have their own privacy policies.
Changes and contact
If this policy changes, the date at the top changes with it. Questions about privacy:
Get in touch