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InvoicePlane vs Billy: catalog facts
InvoicePlane	Billy
Free Free and open source, with no paid tier.	Paid Sold through the Mac App Store and the developer's site; the homepage does not state a…
Web, Self-hosted	macOS
Covers quotes, invoices, payments and client records in one place EU-compliant eInvoice support	EN 16931 and XRechnung compliant e-invoices Data saved in open JSON files
Requires running and securing your own server Project and task management is basic	macOS only Focused on invoicing rather than full accounting
Self-hosted	Downloadable app
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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