Lago

Lago provides an open‑source platform for metering, billing, and revenue management that supports usage‑based, subscription‑based, and hybrid pricing models. It ingests real‑time events, aggregates them across arbitrary dimensions, and generates invoices automatically for any combination of plans, credits, coupons, or custom contracts. The system also offers entitlement handling, payment orchestration with dunning and multi‑gateway support, and analytics that expose MRR, usage trends, and other revenue indicators.

The product is aimed at product‑led companies, SaaS providers, AI and IoT businesses, and any organization that needs fine‑grained control over complex pricing. Engineers and finance teams can interact with all features through a REST API or a visual interface, and the platform can be embedded in marketplaces or white‑labelled for platform providers. It integrates with a wide range of external services, including payment processors, accounting software, CRMs, and tax engines.

Lago is distributed under the AGPL‑3.0 license, can be self‑hosted with Docker, and offers a cloud option for quicker onboarding. It is payment‑agnostic, SOC 2 Type II certified, and includes role‑based access control, allowing enterprises to maintain data privacy and governance while retaining full visibility and extensibility over their billing infrastructure.