Invoice Printer vs Invoice as a Service

Super simple PDF invoicing library for Ruby

A Ruby library for generating clean, professional PDF invoices with minimal code. No complex templates or configuration needed — define your invoice data and get a PDF. Supports custom fonts, logos, and localization. Perfect for solo developers who need invoicing in their Ruby or Rails app without pulling in a heavyweight billing platform.

Simple invoicing REST API — send JSON, get a PDF

A dead-simple invoicing microservice. Send a JSON payload with your invoice data, get back a beautifully formatted PDF. No database, no accounts, no UI — just an API endpoint you can integrate into any stack. Self-hostable, Docker-ready, and perfect for developers who want programmatic invoice generation without a SaaS dependency.