Open Source Accounting Software
In bookkeeping the audit trail is the real product: your ledger has to reconcile to the penny and still make sense to a tax authority years later, long after any subscription has lapsed. That is why this category rewards caution over features, and why the split inside it matters - business bookkeeping, personal budgeting, and plain-text accounting are three different tools that happen to share a shelf. Open source keeps the double-entry engine and your full transaction history in a database or plain text files you control, so a vendor closing its cloud can never hold your books hostage at tax time, and an accountant can always be handed a clean export.
ERPNext
Open source ERP for accounting, inventory, orders, manufacturing, assets, projects, and daily operations
Actual Budget
Local-first envelope budgeting app with multi-device sync and self-hosting
Firefly III
Self-hosted personal finance manager for tracking income, expenses, budgets, and reports
Sure
Self-hosted all-in-one personal finance app, a community fork of Maybe Finance
Dolibarr
Web-based ERP and CRM for managing quotes, invoices, orders, stocks, accounting, and more
TaxHacker
Self-hosted AI accounting for receipts, invoices, and transactions with custom prompts and categories
Ledger
Command-line double-entry accounting that reads plain text files and generates reports
Beancount
Double-entry bookkeeping in plain text, with reports and a web interface
Frappe Books
Desktop accounting for small businesses, works offline with local storage
Our picks
Pick by the job: business books, personal budgeting, or an auditable plain-text ledger.
Best small-business bookkeeping: LedgerSMB LedgerSMB is a web-based double-entry system that reaches past the ledger into quotations, orders, invoicing, projects, timecards, and inventory, storing everything in PostgreSQL. It emails invoices and RFQs as PDFs and outputs templates in PDF, CSV, HTML, and ODF. It suits a small business that wants real accounting plus light ERP without a subscription.
Best personal finance manager: Firefly III Firefly III is a self-hosted personal finance manager using double-entry bookkeeping under budgets, categories, and tags. It adds rule-based transaction handling, recurring transactions, piggy-bank goals, multi-currency support, and a REST API, and a companion Data Importer pulls in bank and file data. It contacts no external servers until you tell it to.
Best plain-text ledger: hledger hledger keeps your books in a plain-text file you control, with a multi-currency double-entry engine and command-line, terminal, and web interfaces. It imports and exports CSV and outputs text, HTML, JSON, and SQL, and is scriptable by CLI or API. Because the data is a versioned text file, every change is auditable.
Best if you need full ERP: ERPNext ERPNext wraps accounting into a complete ERP: transactions, cash flow, and financial reports sit alongside inventory, sales orders, manufacturing, assets, and projects. It runs on the Frappe Framework with a REST API and self-hosts through Docker. Choose it when the books are one part of a larger operation you want in one system rather than a standalone ledger.
Match the software to how your money actually moves
The accounting model matters more than the feature list, and the category hides several. Full double-entry systems like LedgerSMB, ERPNext, and Dolibarr run a proper chart of accounts, fiscal years, and tax handling, and often bundle invoicing, inventory, and CRM. Personal finance apps like Firefly III, Actual Budget, and Sure track income, expenses, and budgets but are not built to hand an accountant a trial balance. Plain-text tools like Beancount, hledger, and Ledger keep the ledger in a file you edit and version. Decide which your accountant expects first, because a budgeting app cannot be forced into a business close and a full ERP is overkill for household spending.
How transactions enter and leave the system is the next axis, where month-end cleanup is won or lost. Software that cannot import bank activity, match payments to invoices, handle refunds, and reconcile statements makes work every period. Check CSV, OFX, and QIF import rules and bank-feed support: Actual Budget imports several statement formats and connects through goCardless and SimpleFIN, while Firefly III ships a companion Data Importer. If the books sit behind ecommerce, payroll, or inventory, test those integrations with real edge cases - partial payments, credit notes, and transfers - not a clean demo invoice.
Controls and the exit path are where accounting differs from ordinary software, because the data becomes evidence for taxes, audits, and financing. You want role-based access, reviewable audit logs, and a clear separation between posting, editing, voiding, and deleting a transaction. The plain-text tools give you version control for free, since every change is a diff. Before moving production books, confirm you can export the general ledger, contacts, invoices, bills, payments, and attachments in a format your accountant can use - a clean exit matters as much as a smooth start.
Related categories
Frequently asked questions
Which type of accounting tool do I actually need?+
Split it three ways. If you run a business and answer to an accountant, you want a double-entry system like LedgerSMB, ERPNext, or Frappe Books that produces a general ledger, trial balance, and financial statements. If you are tracking personal income, expenses, and budgets, Firefly III or Actual Budget fit better. If you value auditability and version control above a GUI, plain-text tools like Beancount and hledger keep the ledger in files you own.
What is plain-text accounting, and who is it for?+
Plain-text accounting keeps your books in a text file written in a defined double-entry grammar, which a tool then reads to produce reports. Beancount, hledger, and Ledger all work this way. The payoff is total transparency and version control: every change is a diff you can inspect, and the data never depends on a running application. It rewards people comfortable in a terminal and text editor, and suits less well those who want a point-and-click interface.
Do open source accounting tools support bank feeds and reconciliation?+
Support varies by country, bank, and tool. Direct feeds often need a third-party aggregator - Actual Budget connects through goCardless and SimpleFIN, and Sure links accounts across many institutions - while others rely on CSV or OFX imports, which Firefly III handles through its Data Importer. Reconciliation quality matters more than the feed itself, so test matching rules, split transactions, duplicate detection, and how the tool treats fees, refunds, and transfers between accounts.
Will my accountant be able to work with it?+
That depends on reports and exports more than the license. Your accountant will expect a general ledger, trial balance, balance sheet, profit-and-loss statement, and receivables and payables aging. The full double-entry systems here produce these directly, and Frappe Books lists ledger, P&L, balance sheet, and trial balance among its reports. Ask your accountant to review a sample export and a month-end workflow before you commit, since their comfort matters most at tax time.
Is a personal finance app enough for a small business, or do I need double-entry?+
For anything an accountant or tax authority will scrutinize, use a double-entry system. Budgeting apps like Actual Budget and Cashew are excellent for personal cash flow but do not maintain the chart of accounts, journal entries, and statements a business needs. GnuCash bridges the two: it does double-entry accounting for personal and small-business use on the desktop. If you invoice customers or track payables, favor a tool built around the ledger, not the budget.
How do I migrate from spreadsheets or another accounting system?+
Migration difficulty tracks how clean your current books are. Customers, vendors, open invoices, unpaid bills, account balances, and history often need separate imports, so many teams pick a cutover date, carry forward opening balances, and keep the old system read-only for history. Full transaction history is possible but usually needs mapping and an accountant's review. Test the import into a throwaway instance before you trust it with live books.
What happens to my books if the project is abandoned?+
Your exposure comes down to data portability, and this category shows both outcomes. When Maybe Finance was abandoned, the community forked it into Sure and kept it self-hostable, which is only possible with open code. Plain-text tools like hledger and Beancount are the safest case, since your ledger is a text file no dead app can trap. Before adopting anything, confirm you can export complete ledgers, contacts, invoices, and attachments so an orderly migration stays possible.