SlowBooks Pro 2026 is unclaimed —

SlowBooks Pro 2026

Bookkeeping that stays on your computer.·slowbookspro.com

SlowBooks Pro is a free, source-available bookkeeping and accounting application for Windows, macOS, and Linux. It provides double-entry accounting, unlimited invoicing, full US payroll with tax forms, perpetual inventory, real-time analytics, and optional bring-your-own-key AI insights. All data is stored locally on the user's own computer rather than in the cloud. It is described as a clean-room replacement for QuickBooks Pro 2003.

What it's for

Double-entry bookkeeping and accountingCreating and sending unlimited invoicesRunning US payroll with tax formsTracking perpetual inventory with COGS postingAnalyzing finances via real-time dashboard and cash forecastAccepting online customer payments via Stripe, PayPal, or SquareMigrating data from QuickBooks Desktop or QuickBooks OnlineMigrating data from XeroGenerating printable financial statementsUsing AI-generated insights on customers, vendors, banking, P&L, and tax

Features 20

Bring-your-own-key AI Insights across seven providers
Class tracking with P&L by Class report
CSV and PDF export of reports
Double-entry accounting
Drill-down from P&L/Balance Sheet to underlying transactions
Fixed-asset register with depreciation
Full US payroll with tax forms
Fuzzy duplicate detection for customers and vendors
IIF import/export for QuickBooks Desktop
Multi-currency invoices and bills with automatic FX gain/loss
Online payments via Stripe, PayPal, and Square
Perpetual inventory ledger with weighted-average cost and automatic COGS posting
PostgreSQL-native backups
Printable financial statements
QuickBooks Online OAuth 2.0 sync (accounts, customers, vendors, items, invoices, payments)
Real-time analytics dashboard (KPIs, revenue trend, A/R and A/P aging, 90-day cash forecast)
Saved reports
Single-user authentication with argon2id password hashing
Unlimited invoicing
Xero migration with dry-run verification

At a glance

free tier

TypeDesktop app

DeploymentInstalled (local)

PlatformsWindows, macOS, Linux

CompanyVonHoltenCodes

Integrations

StripePayPalSquareQuickBooks OnlineXeroxAI GrokGroqCloudflare Workers AIAnthropic ClaudeOpenAIGoogle Gemini

Pricing

Entirely free with no paid tiers, trial, or subscription. AI features require the user's own API key with a third-party provider (cost not set by SlowBooks).

SlowBooks ProFree

Source-available license; free for personal, educational, and internal business use, including at commercial enterprises. Cannot be resold or offered as a paid/hosted service.

No invoice caps, revenue ceilings, trial clocks, or paid tiers