Generating PDF invoices using Lago

Lago offers a comprehensive billing solution that caters to companies with subscription-based, usage-based, or hybrid pricing models, emphasizing the importance of an efficient invoice generation engine. The engine, built with teamwork from design and engineering teams using the Gotenberg library, generates PDF invoices asynchronously, storing them on Amazon S3 to ensure scalability and cost efficiency. Users can update organizational information, including tax rates and contact details, through a user interface or API, and Lago automatically calculates customer dues at the end of each billing period based on events and charges defined in the plan model. The system generates invoice payloads that can integrate with third-party tools like QuickBooks and NetSuite, while ensuring each invoice's uniqueness through sequential IDs and unique numbers. Invoices can be downloaded directly via the interface or API, and their statuses—pending, failed, or succeeded—can be updated in real-time, with automatic payment status retrieval through native integrations with payment service providers.