Self-hosted invoicing for freelancers and small businesses: InvoicePlane is built for freelancers and small businesses who need a simple self-hosted web based invoicing system. It is free, and simple to set up.
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Pros
Pro It's free and open source
Install it on your own server without having to pay.
Pro Self hosted
No need to upload your private data to an unknown cloud provider. Self hosted means full control on your stuff.
Pro Easy installation and low requirements
The application can be installed in about 5 minutes and has very low system requirements. It can be installed in shared hosting environments or NAS systems with less power.
Pro Multilingual interface
The interface is translated by the InvoicePlane community into more than 25 different languages, including Spanish, French, Dutch, Russian, or Chinese.
Pro Built with modern web standards
The app uses the latest version of Twitter Bootstrap and jQuery and is compatible with all modern - even mobile - devices.
Pro Online Payment via PayPal and 24 other payment providers
Customers can pay invoices with one of 25 different payment providers which can be enabled in InvoicePlane, including PayPal, Mollie, Stripe, and Coinbase.
Pro Highly customizable
You can modify and customize various parts of the application and make it fit your needs: from curency displaying and amount formatting to email and PDF templates.