SlowBooks-Pro-2026

Open source alternative to QuickBooks Desktop and AccountEdge

798 stars
Source Available License (non-commercial resale restriction)
Active this week
Last commit 1 day ago

Last verified Oct 21, 2026

Manage double-entry bookkeeping, US payroll, invoicing, and inventory with no cloud account or subscription. Runs on Windows, Mac, and Linux.

Visit website GitHub798 Deploy on Hostinger

Read the full breakdownWho it is for, how it works, trade-offs, the quick start and the FAQ

who it's for

Who SlowBooks-Pro-2026 is for#

Small business owners replacing QuickBooks Desktop

Teams moving off QuickBooks Desktop due to pricing changes or abandoned activation servers can import existing data via IIF export, including invoices, bills, sales receipts, and deposit records. SlowBooks Pro covers the same core workflow: double-entry books, bank reconciliation, payroll, and financial reports.

Skip if:

You need multi-currency support or non-US payroll. Multi-currency is in the project's design work but is not yet a shipped feature; US payroll is the only automated compliance module currently available.

Freelancers and sole proprietors running local books

The desktop mode stores each company as a single SQLite file you can back up to any location. No subscription, no account creation, no cloud upload required. Invoices, estimates, bank reconciliation, and a Schedule C report cover most sole-proprietor needs.

Skip if:

You need a cloud-accessible portal for your accountant or clients. SlowBooks Pro is local-first by design; sharing access requires either the Server Edition or exporting reports manually.

Developers automating accounting workflows via API

The local REST API exposes 357 operations with self-generated documentation that ships with the installer. Developers can point an agent or script at the API to automate invoice creation, payment recording, or report generation. The app is explicitly designed for AI assistant integration.

Skip if:

You need a hosted, multi-tenant API endpoint. The REST API binds to localhost; external access requires the Server Edition or a reverse proxy setup.

Small offices serving multiple users on a LAN

The Server Edition runs from one Windows PC and lets every user access the books through a browser. Roles (admin, bookkeeper, read-only) and per-user audit attribution are built in. A startup task keeps the server running before any user logs in, and setup runs through a single PowerShell script.

Skip if:

You need native mobile apps or a cloud-hosted dashboard accessible from outside your office network. The Server Edition serves only your LAN by default; a TLS reverse proxy is documented but requires additional setup.

the problem

The problem it solves#

Accounting software built on subscription licensing or cloud-only storage puts small business owners in a precarious position. When a vendor raises prices, kills an older product version, or shuts down activation servers, the software you paid for stops working and your data becomes inaccessible or locked in a proprietary format.

This is not a hypothetical challenge: Intuit's activation servers for QuickBooks 2003 Pro have been offline since around 2017, making that version impossible to reinstall even with a valid paid license. Small business owners who relied on desktop accounting software for years found themselves forced onto subscription-based cloud products or into expensive upgrades. Migrating data out of a proprietary format requires either official export paths or community-built IIF parsers.

how SlowBooks-Pro-2026 solves it

How it solves it#

Double-entry bookkeeping with automatic audit log

Every transaction posts to a double-entry ledger with automatic journal entries, a closing-date enforcement lock, and a tamper-evident audit log. The chart of accounts ships with a 50-account contractor setup out of the box, with full manual journal support for adjustments and a complete general ledger report.

US payroll with tamper-evident W-2, W-3, 940, and 941 forms

The full US payroll module handles deductions, garnishments, PTO tracking, employee onboarding, and a token-accessed employee portal. Every W-2, W-3, 940, and 941 PDF carries a SHA-256 content hash and audit ID in the footer so an auditor can verify the form has not been edited since generation.

Server Edition: multi-user LAN serving without Docker

The same signed Windows installer includes a Server Edition that turns one PC into an office-wide bookkeeping server. Users log in through a browser with role-based accounts (admin, bookkeeper, read-only), and a startup task keeps the books available before anyone logs in. No Docker, no containers: the Server Edition is a mode, not a separate SKU.

SimpleFIN bank feeds with no middleman

Bank transaction sync runs through SimpleFIN: you hold the bank credential, with no third-party server in the middle. Transactions arrive with automatic deduplication and bank rules that apply on import. OFX and QFX files, plus Chase and PayPal CSV formats, are also supported with auto-detection.

Migration from QuickBooks, Xero, and six other platforms

The Migrate Data page handles imports from Xero, MYOB, Sage 50, Wave, Zoho Books, and GnuCash, with every import dry-run verified against the trial balance before writing a single record. QuickBooks Desktop IIF files round-trip in both directions, including sales receipts and bills. QuickBooks Online OAuth sync is also available.

strengths · trade-offs

Strengths and trade-offs#

Strengths

Source-available and free for personal and business useThe license permits self-hosting, modification, and internal business use at no cost, including enterprise deployments. You pay only for the server. Unlike QuickBooks Desktop, which requires annual renewal or moves to cloud-only subscription tiers, SlowBooks Pro carries no per-seat or per-year cost for self-hosters.
Data stored in local SQLite files you controlEach company is one SQLite file under a known local path. Upgrades and uninstalls never touch the books. If the project were abandoned tomorrow, your data remains readable by any SQLite client. No export required, no vendor permission needed.
Signed and notarized native installers for Windows and Apple SiliconThe Windows EXE signs with Azure Trusted Signing in CI; the Apple Silicon DMG is signed, notarized, and stapled by the project's Apple Developer ID. Both are self-contained: no Python, no Docker, no build step for end users. The macOS build is maintained by a dedicated contributor and tested on real hardware before each release.
Self-documenting 357-operation local REST API with AI supportEvery installation exposes a fully documented local REST API, making the app scriptable and agent-operable. AI Insights supports seven providers (including Claude, OpenAI, Gemini, and xAI Grok), with API keys encrypted at rest. The API documentation ships with the app itself, not behind a cloud portal.

Trade-offs

-Source-available license prohibits commercial resaleThe license allows self-hosting and running your business on the software, but you may not sell it, sublicense it, or offer it as a paid hosted service. If you plan to build a SaaS product on top of SlowBooks Pro, the license terms prohibit that. Personal, business, and internal enterprise use are explicitly permitted at no cost.
-Payroll module covers US tax forms onlyThe payroll and HR module covers US-specific forms only: W-2, W-3, 940, and 941. There is no built-in payroll for UK, Canada, Australia, or other jurisdictions. International teams can use the double-entry bookkeeping and invoicing features, but will need a separate payroll tool for non-US compliance.

versus alternatives

SlowBooks-Pro-2026 vs alternatives#

SlowBooks Pro vs QuickBooks Desktop

QuickBooks Desktop and SlowBooks Pro cover similar ground: double-entry bookkeeping, invoicing, payroll, inventory, and bank reconciliation for small businesses. The key difference is data ownership and licensing model.

Feature	SlowBooks Pro	QuickBooks Desktop
License	Source-available, free for business use	Proprietary, annual subscription or one-time purchase
Self-hosting	Yes, local SQLite files	Yes, but requires Intuit activation servers
Multi-user	Built-in Server Edition (Windows LAN)	Requires multi-user edition upgrade
Payroll	US module included at no extra cost	Separate add-on, billed annually
Data format	SQLite (open, readable without the app)	QBW (proprietary)
REST API	357-operation local API	QuickBooks API (QuickBooks Online only)

SlowBooks Pro is the better choice when you want to own your data in a format that survives software discontinuation, avoid payroll add-on costs, or run in a Docker environment. The project was built specifically as a QuickBooks Desktop replacement after Intuit's activation servers went offline, so IIF import is a documented first-class migration path.

QuickBooks Desktop is worth considering when you need certified payroll reports, industry-specific editions (contractor, manufacturing), a well-established accountant ecosystem, or a product your bookkeeper already knows.

SlowBooks Pro vs AccountEdge

AccountEdge is a commercial desktop accounting product with payroll and inventory features, targeted at small businesses on Mac and Windows. Like QuickBooks Desktop, it charges for the software license and annual updates.

Feature	SlowBooks Pro	AccountEdge
License	Source-available, free	Proprietary, paid license
Platform	Windows, Mac (Apple Silicon), Linux (Docker)	Mac and Windows
Self-hosting	Yes, local or Server Edition	Yes, local desktop
Payroll	US module included	US payroll included (with plan)
Source access	Available on GitHub	Closed source
Multi-user server	Built-in, browser-based	Separate network edition

SlowBooks Pro covers the core AccountEdge use case at no licensing cost, with the added option of a self-hosted multi-user server that AccountEdge's standard desktop model does not include. AccountEdge is the safer choice when you need long-term commercial vendor support, a product with an established accountant network, or industry-certified payroll filing from a dedicated commercial provider.

install · quick start

Quick start#

bash

Self-hosting on Linux or Intel Mac uses Docker Compose with a built-in PostgreSQL database.
```bash
git clone https://github.com/VonHoltenCodes/SlowBooks-Pro-2026.git
cd SlowBooks-Pro-2026
docker compose up
```

tech stack · detected from GitHub

What it's built on#

Languages: JavaScriptPython
Frameworks: FastAPI
Databases: PostgreSQL

frequently asked

FAQ#

Is SlowBooks Pro really free?

Yes, for self-hosted use. The source-available license permits personal, educational, and internal business use at no cost, including full enterprise deployments. You may not sell it or offer it as a paid hosted service, but running it for your own business has no fee.

Does SlowBooks Pro support multiple users?

Yes. The Server Edition is built into the standard installer for Windows. It converts the app into a LAN-accessible server where users log in through a browser with assigned roles (admin, bookkeeper, or read-only). Each action is attributed to the logged-in user in the audit trail.

Can I migrate from QuickBooks Desktop to SlowBooks Pro?

Yes. SlowBooks Pro imports QuickBooks IIF export files, including invoices, bills, cash sales, and deposit records. A QuickBooks Online OAuth connection can also sync data directly. A migration guide with dry-run verification is included in the project documentation.

What license does SlowBooks Pro use?

SlowBooks Pro uses a source-available license, not an OSI-approved open source license. You may self-host, modify, and run the software for personal, educational, or internal business purposes at no charge. The restriction is commercial resale: you may not sell the software or offer it as a paid hosted service.

Does it run on Mac and Linux?

Yes. A signed and notarized DMG is available for Apple Silicon Macs (M1 and later). Intel Macs use the Docker path. Linux deployments use Docker Compose with a PostgreSQL database, and open on port 3001. All installation methods use the same codebase.

also worth a look

Similar open-source tools#

invoiceninja

Alternative toFreshBooks

Self-hosted invoicing, expenses, and time tracking

10,309 GitHub stars
Licence Elastic License 2.0 (ELv2)

MiroFish

InAI & Machine Learning

Multi-agent simulation engine that predicts real-world outcomes

80,960 GitHub stars
Licence AGPL-3.0

FckSignups

InCustomer Support

Open-source tools that work instantly, no signup required

4,511 GitHub stars
Licence GPL-3.0

securo

Alternative toMonarch Money

Self-hosted money manager with bank sync and AI agents.

4,073 GitHub stars
Licence AGPL-3.0

OpenCompany

Alternative toMicrosoft Copilot Studio

Self-hosted AI agent canvas for every business function

1,017 GitHub stars
Licence MIT

Well

Alternative toDext

Retrieve invoices from email automatically, self-hosted and free

345 GitHub stars
Licence MIT

by category

Open source tools in these categories#

Finance & Fintech

TradingAgents, MiroFish, OpenBB 191

Business & Productivity

OpenClaw, Excalidraw, RustDesk

Hostinger

Run SlowBooks-Pro-2026 on your own server

Self-host SlowBooks-Pro-2026 on a Hostinger VPS.

Deploy on Hostinger

Featured

Inbox Zero

Alternative toSuperhuman

AI email assistant that drafts replies and clears your inbox

12,712 GitHub stars
Licence AGPL-3.0
#Email

rakazo

Alternative toGrok Bot

AI teammates you own: your keys, your model, your machine.

4,904 GitHub stars
Licence Apache-2.0
#AI Agents

Omnara

Alternative toClaude Managed Agents

Open-source agent deployment API. Self-host or use Omnara Cloud.

2,957 GitHub stars
Licence Apache-2.0
#AI Agents

Feature your project

The projects we add and every new guide. Free, unsubscribe any time.

Find open source alternatives to paid software

SlowBooks Pro vs QuickBooks Desktop

Feature	SlowBooks Pro	QuickBooks Desktop
License	Source-available, free for business use	Proprietary, annual subscription or one-time purchase
Self-hosting	Yes, local SQLite files	Yes, but requires Intuit activation servers
Multi-user	Built-in Server Edition (Windows LAN)	Requires multi-user edition upgrade
Payroll	US module included at no extra cost	Separate add-on, billed annually
Data format	SQLite (open, readable without the app)	QBW (proprietary)
REST API	357-operation local API	QuickBooks API (QuickBooks Online only)

SlowBooks Pro vs AccountEdge

Feature	SlowBooks Pro	AccountEdge
License	Source-available, free	Proprietary, paid license
Platform	Windows, Mac (Apple Silicon), Linux (Docker)	Mac and Windows
Self-hosting	Yes, local or Server Edition	Yes, local desktop
Payroll	US module included	US payroll included (with plan)
Source access	Available on GitHub	Closed source
Multi-user server	Built-in, browser-based	Separate network edition