Integrations

Billing Booster works on its own, but it integrates with other products from BlueRabbIT to do more. On the Integrations tab inside the Billing Booster interface you can see which of these products are detected and what each one adds.

BestPDF

BestPDF is our advanced document engine for WHMCS. It replaces WHMCS's default PDF generation with fully customisable, professional invoice and quote designs.

On its own, Billing Booster injects the payment code into the PDF at a fixed position, through one of the billboost-* child themes. When BestPDF is installed, you instead place the payment code exactly where you want it on the page using the design editor's Payment Code component — a bare QR code anywhere, or a Swiss QR slip at the foot of the page the content reaches it on — and you can attach the e-invoice XML directly into the PDF (essential for ZUGFeRD / Factur-X, which must carry the XML inside the PDF).

When detected, the Integrations tab links straight to the BestPDF configuration.

Product page: bluerabbit.solutions/products/whmcs/bestpdf

Pingen Post

Pingen Post for WHMCS lets you use the pingen.com service to send printed invoices by physical mail worldwide.

Pingen Post specifically supports Swiss QR payment slips. When both modules are active, Billing Booster generates QR-bills formatted for compatibility with Pingen's postal delivery, so a Swiss invoice can be paid from the slip the customer receives in the post.

Product page: bluerabbit.solutions/products/whmcs/pingen