SlowBooks Pro vs Wave: which free accounting software fits you in 2026?
Last updated July 2026 · Written by the SlowBooks Pro team — we'll tell you honestly when Wave is the better pick
Feature comparison
| Feature | SlowBooks Pro 2026 | Wave (free Starter plan) |
|---|---|---|
| Price | Free — every feature, no caps | Free core; Pro plan & add-ons paid |
| Where your data lives | Your computer (local files you can copy) | Wave's cloud servers |
| Invoicing | Unlimited | Unlimited |
| Double-entry accounting | Yes — journal entries, closing dates, audit log | Yes |
| Payroll | Included — W-2/W-3/940/941, PTO, deductions, employee portal | Paid add-on (monthly fee + per employee) |
| Inventory tracking | Perpetual inventory, weighted-average cost, auto COGS | Not offered on any plan |
| Bank transaction import | Manual OFX/QFX file import with duplicate detection | CSV upload free; automatic bank feeds require paid Pro |
| Receipt scanning | Not built in (attach files to transactions) | Paid add-on |
| Analytics / reporting | P&L, Balance Sheet, aging, cash forecast, KPI dashboard, drill-down | Core financial reports |
| AI features | Optional, bring-your-own-key (7 providers incl. self-hosted) — off by default | None |
| Online payments | Stripe Checkout (Stripe's per-transaction fees apply) | Built-in (per-transaction fees apply) |
| Mobile app | No — desktop & self-hosted web | iOS / Android |
| Multi-user | Single bookkeeper + employee self-service portal (Docker deploy) | Limited free roles; unlimited collaborators on paid Pro |
| Works offline | Completely — it never phones home | Requires internet |
| Source code | Source-available on GitHub | Proprietary |
| Platforms | Windows (signed installer), macOS, Linux, Docker | Any browser, iOS, Android |
Where Wave is the better choice
Wave earns its reputation. If you invoice a handful of clients and want to send an invoice from your phone in a parking lot, Wave's mobile apps and polished cloud UI beat anything a desktop app can offer. Its built-in payment processing is frictionless, and CSV bank-statement uploads are workable on the free tier. If "runs in any browser with zero setup" is your top requirement, use Wave.
Where SlowBooks Pro is the better choice
The gap opens the moment you need more than invoicing. On Wave, payroll is a paid subscription, automatic bank feeds require the paid Pro plan, receipt capture is a paid add-on, and inventory simply doesn't exist. SlowBooks Pro includes full US payroll with tamper-evident W-2/940/941 PDFs, perpetual inventory with automatic COGS, a real-time analytics dashboard, and QuickBooks 2003 IIF interop — all free, because there is no paid tier to upsell you to.
The deeper difference is philosophical: your books are files on your own disk. No account to create, no telemetry, nothing to cancel, and the software keeps working if the company behind it ever disappears — the exact failure that created this project when Intuit's QuickBooks 2003 activation servers went dark.
The bottom line
Wave is the best free cloud invoicing tool. SlowBooks Pro is the most complete free accounting system — closer to what QuickBooks Desktop used to be — for anyone comfortable installing an app and importing bank files themselves.
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Signed Windows installer — no account, no trial clock, no upsell. Your books stay on your computer.
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