Open Source Accounting Software
In bookkeeping, the audit trail is the product - your ledger has to reconcile to the penny and survive scrutiny years later, long after any subscription lapses. The open source options here keep the double-entry engine and your full transaction history in a database or plain text you control, so a vendor closing its cloud doors can never hold your books hostage at tax time.
ERPNext
Open source ERP for accounting, inventory, orders, manufacturing, assets, projects, and daily operations
Actual Budget
Local-first envelope budgeting app with multi-device sync and self-hosting
Firefly III
Self-hosted personal finance manager for tracking income, expenses, budgets, and reports
Sure
Self-hosted all-in-one personal finance app, a community fork of Maybe Finance
Dolibarr
Web-based ERP and CRM for managing quotes, invoices, orders, stocks, accounting, and more
TaxHacker
Self-hosted AI accounting for receipts, invoices, and transactions with custom prompts and categories
Ledger
Command-line double-entry accounting that reads plain text files and generates reports
Beancount
Double-entry bookkeeping in plain text, with reports and a web interface
Frappe Books
Desktop accounting for small businesses, works offline with local storage