Firefly III

Firefly III is a self-hosted personal finance manager built around double-entry bookkeeping. It's designed for people who want full control over their financial data without relying on a third-party service. Every transaction is yours, stored on your own server.

At its core, it handles transaction management across multiple currencies. You can record income, expenses, and transfers, then organize them using a combination of budgets, categories, and tags. These aren't mutually exclusive. Use all three together, or just the one that fits how you think about money.

Budgets support per-currency limits, so you can track household spending in your local currency alongside any other currency you deal with regularly.

The rule engine is one of its more practical features. You can write rules that automatically clean up imported bank data, expand shorthand descriptions into full transaction details, or apply categories based on patterns. Anyone who's wrestled with a bank's CSV export will appreciate this.

Data import is handled through a dedicated import tool that pulls in transactions from external sources, making it easier to migrate existing data or keep records in sync.

Reporting covers expenses broken down by week, month, or year. You can also run account audits, compare budgets side by side, or analyze spending by tag. The reports are detailed enough to spot trends without requiring a separate spreadsheet.

The JSON REST API exposes most of Firefly III's functionality to external apps. Mobile clients, scripts, and integrations can create transactions, manage categories, and pull chart data programmatically.

Compared to tools like Actual or ezBookkeeping, Firefly III leans toward users who want a more structured, accounting-style approach. The double-entry system adds rigor that simpler budgeting apps skip. It's a good fit for anyone who wants their personal finances managed with the same discipline as a small business ledger.