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Invoice Ninja vs Billings Pro: catalog facts
Invoice Ninja	Billings Pro
Freemium Free plan available, with paid plans that carry a 30-day money-back guarantee.	Paid Includes a 30-day free trial.
Linux, Web	macOS, iOS
Supports many payment gateways for one-click client payments Recurring invoices and auto-billing	Combines time tracking, estimates, invoicing, and payment records Syncs across Mac, iPhone, iPad, and Apple Watch
Hosted service requires an account Some features are reserved for paid plans	Focused on freelancers and small business billing workflows
Downloadable app, Hosted service	Downloadable app
Open source	Closed source
License: AAL	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.