Lago

Lago is an open-source billing platform for usage-based, subscription, prepaid and hybrid pricing. It meters usage events, including input, output and cached AI tokens, applies prepaid credits and tax, and generates itemized invoices. Payments are collected through existing processors such as Stripe, Adyen and GoCardless.

The website targets engineering, product and finance teams at AI, fintech and IoT companies. It is available as a self-hosted AGPLv3 deployment or as a managed cloud service, and its Premium tier is sold on request rather than at public list prices. Named customers include CoreWeave, Mistral AI and PayPal.

The site states that Lago has raised $22M from tier 1 investors, with backers including Firstmark, SignalFire and Y Combinator, and lists Anh-Tho Chuong (CEO) and Raffi Sarkissian (CPO) as co-founders. Structured data gives a Dover, Delaware, US address. The careers page lists one open role, Engineering Squad Lead, remote in Europe.

Product: Open-source billing platform (AGPLv3) for metering usage, subscriptions, prepaid credits, invoicing and AI token billing, self-hosted or cloud.