In simple English
SlowBooks Pro 2026 is an accounting tool for small businesses and solo builders. It handles bookkeeping, invoices, inventory, and US payroll on your own computer. You keep your financial records in local files instead of a subscription cloud service. It costs nothing to download and run, but you do the setup and backups yourself. It is built as a desktop app that can also run as a server for a small office.
What it is
A complete double-entry accounting application written in Python and FastAPI, using SQLite or PostgreSQL for data storage. It packages a backend API and a web frontend into a desktop application or a self-hosted server.
What it is good for
Solo builders and small business owners who want to escape cloud-based accounting fees and keep total control of their financial data.
- No monthly subscription fees or user caps.
- Keeps all accounting data in local files you own.
- Includes payroll, inventory, and multi-user server options.
- Custom source-available licence restricts selling the software as a paid service.
- Requires manual updates and self-hosted backups.
- US payroll features may need careful verification for local tax compliance.
QuickBooks Online or Xero
PostgreSQL
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git clone https://github.com/VonHoltenCodes/SlowBooks-Pro-2026.git cd SlowBooks-Pro-2026 docker compose up