Best Open Source Bookkeeping Software for Small Business (2026): 6 Tools Compared

Bookkeeping is the daily record of money in and out. Small businesses need something simple that an accountant can read at year end. These open source options range from desktop ledgers to web apps, and we also flag the personal-finance tools that are not suitable for a business.

We write for small businesses, freelancers and growing teams, not large enterprises. Every tool below was checked on GitHub for license, archive status and recent activity, and prices are never quoted because they change. Our picks are based on each project's documentation and repository data, not on hands-on benchmarks, so always try a tool with sample data first. This is general information, not tax, legal or accounting advice.

Top picks at a glance

• GnuCash: Single bookkeeper, desktop.
• Bigcapital: Web-based small-business books.
• LedgerSMB: Multi-user double-entry on the web.

What to look for in bookkeeping software for a small business

• Double-entry or not. Double-entry bookkeeping catches mistakes because every entry has two sides. Prefer it for a business.
• Chart of accounts. You should be able to set up accounts that match your accountant's layout.
• Import and export. CSV import for bank statements and an export your accountant can open save hours.
• Audit trail. Look for transaction history so changes can be traced.
• Project health and license. Choose a project that is not archived, has recent releases and a real open source license. Check the LICENSE file, not just the website.

Comparison table: best open source bookkeeping software

Stars and update dates are a snapshot from 16 October 2026 and change daily. They show activity, not quality.

The 6 best open source bookkeeping tools, reviewed

1. GnuCash

Best for: Single bookkeeper, desktop
License: GPL-2.0 or GPL-3.0 · Stack: C (desktop app) · GitHub: 4,378 stars, repo updated Oct 2026

The classic free double-entry bookkeeping program for one person. Reliable and well understood by accountants, but not a web app.

Source on GitHub · Official website

2. Bigcapital

Best for: Web-based small-business books
License: AGPL-3.0 · Stack: TypeScript (Node.js, React) · GitHub: 3,939 stars, repo updated Oct 2026

An accounting and reporting app with invoicing, a good fit if several people need browser access to the books.

Source on GitHub · Official website

3. LedgerSMB

Best for: Multi-user double-entry on the web
License: GPL-2.0 · Stack: Perl, PostgreSQL · GitHub: 570 stars, repo updated Oct 2026

Web-based double-entry bookkeeping with receivables, payables and reporting. Plain interface, solid accounting model.

Source on GitHub · Official website

4. hledger

Best for: Plain-text bookkeeping
License: GPL-3.0 · Stack: Haskell (plain-text accounting) · GitHub: 4,766 stars, repo updated Oct 2026

Keeps the books in a text file you can version in Git. Fast and transparent, but you need to be comfortable with the command line.

Source on GitHub · Official website

5. ERPNext

Best for: Bookkeeping inside an ERP
License: GPL-3.0 · Stack: Python (Frappe), MariaDB · GitHub: 40,232 stars, repo updated Oct 2026

Best when you also need sales, purchasing and stock. More than you need if you only keep simple books.

Read our full guide to ERPNext · Source on GitHub · Official website

6. TaxHacker

Best for: Receipt and invoice capture helper
License: MIT · Stack: TypeScript · GitHub: 6,749 stars, repo updated Sep 2026

A self-hosted app that uses an LLM to read receipts and invoices into structured records. A capture aid, not a full ledger.

Source on GitHub · Official website

Open source vs paid bookkeeping software

Paid cloud products usually win on polish, mobile apps, automatic bank connections and support. Open source wins on running cost as you grow, data ownership and the freedom to customize. The real cost of open source is hosting, backups, updates and your own time, so count those honestly. Several of these projects also sell hosting or support if you would rather not run a server yourself.

How to choose the best bookkeeping software

• You work alone and want something proven: GnuCash.
• Your team needs browser access: Bigcapital or LedgerSMB.
• You like version control for everything: hledger.
• You need sales and inventory too: ERPNext.

Popular tools that are not open source (or not maintained)

These names show up in many "open source" lists, so check the license before you choose them:

• Frappe Books: The GitHub repository is archived (read-only), so it no longer receives updates. Repository

Checked from the projects' LICENSE files and GitHub status on 16 October 2026. Licenses can change.

Mistakes to avoid

Firefly III and ezBookkeeping are excellent open source tools, but they are built for personal finance, not business bookkeeping, so we do not recommend them as your company's books. Always agree the format with your accountant before you start.

Where to host it

All of these tools can be self-hosted. A small VPS or a web hosting plan from a provider such as Hostinger is enough to get started with most of them. Check each project's requirements first, and read our security and backup checklist before you add real data.

Related comparisons

• Best Open Source Accounting Software for Small Business
• Best Open Source Bank Reconciliation Software (2026)
• Best Open Source Expense Tracking Software (2026)
• Best Open Source Invoicing Software for Small Business

All open source business software comparisons

• Accounting
• Bookkeeping
• Billing
• Invoicing
• Payroll
• Inventory Management
• Warehouse Management
• Expense Tracking
• Spend Management
• Accounts Payable
• Accounts Receivable
• Cash Flow Management
• Bank Reconciliation
• Purchase Order
• Vendor Management
• Point of Sale (POS)
• Time Tracking
• Quotation & Estimates
• Revenue Recognition
• Financial Reporting
• Asset Management
• Lead Management
• Sales Pipeline
• ERP

Also see our directory of 50 open source CRMs.