Lago | Open-Source Billing Infrastructure

# Lago > Lago is the open-source billing platform for usage-based, subscription-based, and hybrid pricing models. Built for AI, SaaS, fintech, IoT, and infrastructure companies that need flexible, high-volume billing without vendor lock-in. Self-host for full control, or use Lago Cloud to get started in minutes. Lago processes up to 1,000,000 billing events per second. It supports every modern pricing model — metered, subscription, prepaid credits, hybrid, entitlements — through a single API-first platform. The codebase is open-source (AGPLv3) and fully auditable. Customers include Mistral AI, PayPal, and Groq. Important notes: - Lago is not a payment processor. It handles billing logic, metering, and invoicing. It integrates with payment processors (Stripe, Adyen, GoCardless, and others). - Lago is not a subscription management tool only. It is a full metering, billing, and revenue platform. - "Plans" in Lago define pricing structure. "Subscriptions" are created when a plan is assigned to a customer. These are distinct concepts. - Lago Cloud and Lago self-hosted use the same codebase. The difference is deployment, not features. ## Core platform - [Homepage](https://getlago.com/): Open-source billing infrastructure for usage-based and hybrid pricing. Trusted by Mistral AI, PayPal, Groq, and others. - [Pricing](https://getlago.com/pricing): Lago's plan tiers — Starter, Growth, and Enterprise. Cloud and self-hosted options available. - [Customers](https://getlago.com/customers): Customer stories and case studies from AI, fintech, SaaS, and infrastructure companies using Lago. - [Security](https://getlago.com/security): SOC 2 Type II, RBAC, SSO, audit logs, and deployment options (cloud, VPC, on-premise). - [Book a demo](https://getlago.com/book-a-demo): Contact Lago's team for a guided demo and trial access. - [About Lago](https://getlago.com/about-us): Company background, founding story, and mission. ## Platform features - [Usage Metering](https://getlag