Bufin

How Bufin works

Bufin is a private budgeting web app that stores your financial data in storage you already own, instead of in a database we own. Two minutes of reading covers the whole model.

Step 1: pick where your budget lives

There are two ways in and both are free. Neither asks for a card.

  • No account: Bufin saves everything in this browser's local storage. Nothing to sign up for, nothing leaves the device: and nothing is backed up, so clearing browser data deletes it.
  • Google or Microsoft sign-in: Bufin writes the same files into a hidden app folder of your own Google Drive or OneDrive, which syncs across your devices and survives a new browser.

Step 2: put your money in

Type transactions, import a CSV your bank already exports, photograph a receipt, or screenshot your bank's transaction list and let Bufin read the numbers on-device. Bufin never connects to a bank and never asks for banking credentials, which is why none of this is automatic, and why there is no login of yours for anyone to lose.

Step 3: the app does the arithmetic

Budgets, recurring bills, envelopes, paycheque planning, net worth, debt payoff and portfolios all read from the same files. Calculations happen in your browser; the numbers never make a round trip to us to be totalled.

What Bufin's own servers hold

A small account record: your name, email and picture from sign-in, your roadmap votes, your two-factor setting, plus shared household budgets, if you use them, and anonymous counters of page views and clicks. No personal transactions, no balances, no merchant names.

Leaving

Export as JSON or Excel from Settings, whenever you want, and delete your account from the same screen. Because the files were in your own cloud the whole time, deleting the account never takes the budget with it.

Content last reviewed 2026-08-18