Bigcapital

Bigcapital is accounting and inventory software for small and medium businesses. It keeps business finances in one place and automates accounting tasks across bills, expenses, payments, invoicing, and inventory, producing financial statements and reports to support decisions.

Transactions run on a double-entry system, and a headless API lets you integrate the same accounting engine with other systems. Reports cover the books, sales, purchases, and inventory.

You can self-host it on your own servers with Docker and Docker Compose, or use the hosted Bigcapital Cloud. It is released under the AGPL.