AI and SaaS companies are increasingly adopting usage-based or hybrid pricing models to better align with customer needs, yet many face challenges with outdated billing systems. Lago addresses these issues by providing a platform designed for high-volume, real-time billing and flexible pricing, enabling companies to automate and adapt their monetization strategies without compromising on innovation. By supporting complex pricing models such as subscriptions combined with pay-per-use and prepaid credits, Lago allows businesses to experiment with and refine their pricing strategies. The platform's capacity to process up to 15,000 billing events per second ensures accurate real-time usage tracking and billing, which is particularly beneficial for AI products that require intricate pricing mechanisms. Lago's open-source, modular architecture offers transparency and customization, avoiding vendor lock-in and allowing for seamless API integration. By automating billing workflows from metering to invoice generation and payment collection, Lago reduces manual errors and accelerates revenue recognition, making it a compelling alternative to in-house billing solutions for tech companies seeking efficient and scalable billing infrastructure.