Legal

Privacy Policy

Hollow exists to keep your money private, so we collect as little as we can. No accounts, no analytics, no cookies, no tracking. This page explains exactly what does and doesn't leave your device.

Last updated October 19, 2026

The short version

  • Your secrets never leave your browser. Notes, proofs, your vault and its passphrase are made and kept on your device. We never receive them.
  • We don't track you. No analytics, advertising, tracking pixels, fingerprinting or cookies.
  • We don't sell or share data. We hold very little to begin with.
  • Some services see your IP address when your browser talks to them (hosting, fonts, the Solana RPC and the relayer).
  • The blockchain is public. Deposits and withdrawals are recorded on Solana for anyone to see. Hollow hides which deposit belongs to which withdrawal, not that they happened.

What stays on your device

The app uses your browser's local storage, never cookies, for:

  • your vault, encrypted with your passphrase (AES-GCM; the passphrase is never stored);
  • the ids of withdrawals you scheduled with the relayer, so the app can show their status;
  • public pool history it has already downloaded, so it doesn't fetch it again;
  • small preferences, such as Hood up and the name of the wallet you last connected.

Clearing your browser's site data deletes all of it, including your vault. Download a vault backup first.

What we never collect

Your name, email address (unless you write to us), phone number, wallet recovery phrase or private keys, notes, send links, vault passphrase or browsing history. We have no accounts, so there is no profile about you to keep.

The blockchain

Every deposit and withdrawal is a public Solana transaction. Anyone can see that a wallet deposited into a pool, and that a pool paid out to an address. What Hollow removes is the on-chain link between the two. We can't edit or delete anything recorded on Solana.

If you contact us

If you email contact@usehollow.xyz, we receive your email address and whatever you write. We use it only to reply, and we never ask for your notes, keys or recovery phrase. Anyone who does is not us.

Children

Hollow is not meant for children and we don't knowingly collect anything from them.

Changes

If this policy changes, we'll update the date at the top. We won't start collecting more without saying so here first.

Questions

Write to contact@usehollow.xyz.