Budget Zero
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Budget Zero runs in your browser as a client-side app with no backend or account login, so all data stays on your device. It's open source, meaning the code is publicly auditable and you're not locked into a vendor's platform. The offline-first design appeals to users concerned about cloud privacy.
Best for people who want to own their budget data outright and aren't afraid of managing a self-hosted or local tool. You handle backups yourself, which requires discipline. Strong fit if you're technical and value transparency and independence over convenience integrations.