Open-source alternatives to Quicken

2 community-reviewed projects you can use instead of Quicken.

1. Firefly III - Free, self-hosted personal finance manager you run on your own server (e.g. via Docker) to track expenses and income with budgets, categories, tags, imports and detailed financial reports, without uploading your records to a cloud service. (Licence: AGPL-3.0)
2. Money Manager Ex - Money Manager Ex (MMEX) is a free, open-source, cross-platform personal finance program that organises bank, cash and asset accounts, tracks where your money goes, and supports budgets, recurring transactions, multiple currencies and reports on Windows, macOS and Linux. (Licence: GPL-2.0)