Firefly III

Firefly III is a personal finance manager built around double-entry bookkeeping, so every amount that comes in or goes out is recorded against a real account rather than a loose category. It tracks recurring transactions and budgets, generates reports and charts, and can fire webhooks so other tools react to new entries.

People use it to follow spending across several bank accounts, plan monthly budgets, and keep a clean personal ledger that an accountant can actually read.

Self-hosting keeps your financial history on hardware you control, without per-account fees, and stores it in a database that is easy to back up.