InvoiceShelf vs Sidetrade

InvoiceShelf is a free, open-source, self-hosted web application for invoices, estimates, payment tracking, and expense management. It supports branded documents, custom fields, tax rules, multiple currencies, and PDF templates. Recurring invoices can be generated for retainers, subscriptions, and repeat customers, while reports cover sales, taxes, overdue balances, and profit. Customers can view invoices, estimates, and payments in a private portal without creating a separate account. Users can record partial and full payments; the homepage lists Stripe checkout for online card payments. The application also supports payment reminders, remote file storage through listed drivers such as Dropbox, Amazon S3, and DigitalOcean Spaces, and backups from its interface. Backups can include everything, only the database, or only files. It advertises a REST API and module system, while webhooks are marked as coming soon. Hosting requires PHP 8.3 or 8.4, Nginx or Apache, and a supported database. The free plan is listed as free and includes unlimited invoices and customers.

Sidetrade has no write-up on Specifiction yet; its figures are above.