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InvoiceShelf vs SolidInvoice: catalog facts
InvoiceShelf	SolidInvoice
Free Free and open source under the AGPL-3.0 licence, with no per-seat fees.	Freemium Free to self-host; the hosted service is a monthly subscription with a 14-day trial.
Web, Self-hosted	Web, Self-hosted
Invoices, estimates, payments and expenses in one place Recurring invoices and a customer portal	Quotes, recurring invoices and automatic reminders Online payments via Stripe and PayPal
You maintain the server and backups yourself The 3.x branch is an alpha preview not meant for production data	Self-hosting requires a PHP server setup Focused on invoicing rather than full accounting
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: AGPL-3.0	License: MIT
Not stated if an account is needed	Account 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.