NEW Israeli osek + US LLC, one person, both countries

Your books. Your machine.

Bank sync, invoices, reports and tax forms for freelancers and small businesses. Everything lives in one file on your computer. No account, no cloud, no subscription.

Free & open sourceEnglish + עבריתOne 90 MB binary
127.0.0.1:8765
OpenBooks home: cash, revenue and expenses for a US LLC
Everything a one-person business needs

Mercury-grade bookkeeping, without handing over your data.

Import statements or connect your bank once. Rules classify the rest. Reports, invoices and tax forms update as you go.

Bank sync

Mercury's API, Israeli banks and cards (Hapoalim, Leumi, Max, Cal, One Zero…), bit, and any bank's CSV.

Rules & review

Classify once, it sticks. A keyboard-first review queue clears the rest in minutes.

Real reports

P&L, balance sheet, cash flow and general ledger. Monthly, total or against last year. Export to CSV.

Invoices & receipts

US invoices, Israeli חשבון עסקה and קבלה with proper numbering. Matched to payments automatically.

⌘K for everything

Jump to any page, transaction or counterparty. Press Tab to ask your books a question with your own AI key or a local model.

Works with Claude

A built-in MCP server lets Claude or any MCP client read your books and propose changes you approve.

Tax, built in

The forms fill themselves from your books.

Country packs carry each year's rates, deadlines and forms, with the source for every number.

openbooks / taxximizer
Taxximizer: tax savings for an Israeli osek
# download, run, done
$ ./openbooks
→ http://127.0.0.1:8765

# or plug it into Claude
$ claude mcp add openbooks -- ./openbooks mcp

# or from source
$ bun install && bun apps/server/src/main.ts
Private by design

No servers. Nothing to breach.

$0forever, AGPL-3.0
1 fileyour whole books
2countries, more welcome
0accounts to create
See it with real-looking numbers

Click around two made-up businesses.

A US LLC and an Israeli osek zair, 21 months of transactions. Every total is computed by the same engine you'd run at home.