Flexprice is an open-source platform tailored for developers that streamlines the processes of metering, pricing, and invoicing for SaaS and AI offerings. This platform empowers teams to create pricing structures that are based on usage, credits, or a combination of both, providing extensive control over their models. With its real-time usage metering capabilities, Flexprice allows users to specify detailed events such as API calls, compute time, or unique actions, ensuring reliable tracking even as demands scale. It accommodates various financial structures, including prepaid and promotional credits, automatic top-ups, and expiration policies, all of which can be configured easily without the need for complex logic. Flexprice's adaptable pricing engine facilitates the creation and modification of seat-based, usage-based, or hybrid pricing plans while allowing for customer-specific overrides and adjustments over time without necessitating additional engineering work. Additionally, the platform includes integrated feature management tools that enable the definition of Boolean, metered, and configuration features for each plan and customer, ensuring that limits are enforced directly within the backend system. Finally, Flexprice produces precise invoices based on real-time data from usage, subscriptions, or credits, ensuring transparency and accuracy in billing. This comprehensive approach not only simplifies pricing strategies but also enhances overall customer satisfaction.