5 Open Source Tools to Help You Tidy Up Your Finances and Save Money

Personal finance software has a trust problem. The popular apps want a connection to your bank, charge a monthly fee for the privilege, and give you no way to check what happens to the data once it arrives. Open source alternatives fix the second half of that by default and, in most cases, the first half too - you can host them yourself and the data never leaves a machine you control.

This list is for individuals rather than businesses. Each tool below does one job properly instead of half a dozen badly, which is why running two or three of them together works better than looking for a single app that claims to do everything.

Why Open Source Matters More for Money Than for Anything Else

Financial data is the most sensitive category most people hold. It shows where you live, what you buy, who you pay, and how much is left at the end of the month. When the code is published, that claim on the marketing page about privacy becomes something anyone can verify rather than something you have to believe.

The second advantage is durability. Closed finance apps get acquired and shut down - Mint is the obvious example, and it took its users’ histories with it. An open source project can be forked, self-hosted, and kept running by anyone who cares enough, and your data sits in a database or a plain text file you can export at any time.

1. Actual Budget - Envelope Budgeting That Works Offline

Actual Budget is a zero-based, envelope-style budgeting app in the tradition of YNAB: every unit of income gets assigned a job before you spend it. It is local-first, so the app works offline and syncs through a server you run, with optional end-to-end encryption.

It is released under the MIT licence and the sync server ships as a single Docker container small enough for the cheapest VPS or a Raspberry Pi. Bank syncing is optional and handled through third-party providers - GoCardless covers EU and UK banks at no cost, while SimpleFIN handles US and Canadian banks for a small monthly fee. Importing statements manually costs nothing and keeps the bank out of it entirely.

• Best for: people who want to plan spending forward rather than review it afterwards
• Licence: MIT - permissive, no copyleft obligations if you fork it
• Runs as: web app, desktop app, or offline PWA, with a self-hosted sync server
• Weak spot: it is a budgeting tool, not a record-keeping one - it will not track investments

2. Firefly III - The Full Personal Ledger

Firefly III is the serious option: a self-hosted personal finance manager built on double-entry bookkeeping, with budgets, categories, tags, rule-based auto-categorisation, recurring transactions, savings goals, and reports. It is AGPL-3.0 licensed and written in PHP, deployable by Docker on a NAS, a VPS, or a Raspberry Pi.

The strength and the cost are the same thing. Double-entry means the numbers always reconcile and the reports are trustworthy, but it also means a real setup session and a habit of importing transactions. If you have tried a budgeting app and found it too shallow, this is the step up. If you have never kept accounts before, start with Actual Budget instead.

• Best for: people who want one authoritative record of every account and transaction
• Licence: AGPL-3.0 - self-host freely, network-served modifications must be published
• Runs as: self-hosted web app, no official cloud version
• Weak spot: the steepest learning curve on this list, and there is no hosted option to fall back on

3. Suprascribe - Automatic Subscription Tracker

Budgeting apps and ledgers both assume you already know what you are paying for. Subscriptions are the category where that assumption fails: they bill under merchant names that match nothing, through app stores and PayPal, on dates nobody remembers, and they keep working after you stop using the service. That is a separate job from budgeting, which is why it needs a separate tool.

Suprascribe is an open source subscription tracker under the AGPL-3.0 licence, with the full source on GitHub for you to audit or self-host. It works from your inbox rather than your bank - receipts and renewal notices name the service, the amount, and the billing period, which is exactly the information a bank feed strips out. Manual tracking is free and unlimited, and Pro, which adds inbox discovery and renewal reminders, is a one-time payment rather than another monthly charge.

• Best for: finding recurring charges you have forgotten and stopping them before the next renewal
• Licence: AGPL-3.0 - readable, auditable, self-hostable
• Runs as: hosted web app and PWA, or self-hosted from source
• Weak spot: it tracks subscriptions, not your whole financial picture - pair it with a budgeting tool

If you would rather run everything on your own hardware, Wallos is a GPL-3.0 self-hosted subscription tracker where you enter each subscription by hand. The trade-off is the one that matters here: manual entry only finds the subscriptions you already remember, and forgotten charges are the expensive ones.

4. Ghostfolio - Investments and Net Worth in One Dashboard

Ghostfolio tracks investments across accounts and asset classes - stocks, ETFs, crypto, cash - and turns them into a single view of allocation, performance, and net worth. It is AGPL-3.0 licensed, self-hostable with Docker, and there is a paid hosted plan if you would rather not run a server.

This is the tidiest fit for anyone whose money is spread across a broker, a pension, and an exchange. Self-hosting keeps your holdings and net worth off a third-party service, which is the part most portfolio trackers cannot offer at any price.

• Best for: tracking a portfolio spread across several brokers or exchanges
• Licence: AGPL-3.0
• Runs as: self-hosted Docker deployment, or a paid hosted plan
• Weak spot: it does not do budgeting or day-to-day spending at all

5. GnuCash - Desktop Double-Entry With No Server At All

GnuCash has been in development for over two decades and remains the most credible option for people who want proper accounting without hosting anything. It is a free desktop application for Windows, macOS, and Linux under the GNU GPL, with double-entry bookkeeping, bank reconciliation, multi-currency support, stock tracking, invoicing, and a large set of reports.

Your file lives on your own disk, which makes backups your responsibility and syncing between devices awkward. In exchange there is no server to maintain, no container to update, and no account anywhere. For long-term records that need to outlive any particular web app, that is a reasonable trade.

• Best for: long-term personal records, and anyone who does not want to run a server
• Licence: GNU GPL
• Runs as: desktop application on Windows, macOS, and Linux
• Weak spot: dated interface, no real mobile story, and syncing across devices is on you

How to Combine Them Without Creating a Second Job

Running five finance apps is a hobby, not a system. Two is usually the right number for an individual: one tool that answers "where is my money going" and one that answers "what is still charging me". Add a third only when you have a real portfolio to track.

• Light setup: Actual Budget for the monthly plan, Suprascribe for recurring charges
• Full setup: Firefly III as the ledger, Suprascribe for subscriptions, Ghostfolio for investments
• No-server setup: GnuCash on your desktop, Suprascribe in the browser for the subscription side

The order matters more than the stack. Start with the tool that recovers money in the first session, then add the one that requires a habit - a system you abandon in week three saves nothing, however well designed it is.

Start With the Money Already Leaving Your Account

Budgeting, ledgers, and portfolio tracking all pay off gradually, and all of them ask you to keep doing something. Cancelling a subscription you had forgotten pays off immediately and then keeps paying every month without further effort, because a cancelled subscription stays cancelled.

So do the audit first. Add up every recurring charge, cancel what you are not using, and only then decide which budgeting tool you are going to live with. The list you produce is also the input the other tools need - fixed monthly outgoings are the part of a budget everyone underestimates.