Lago

The company participated in Y Combinator's Summer 2021 batch and has since raised a total of $22.1 million. This includes a $7 million seed round led by SignalFire and a $15 million Series A round led by FirstMark Capital, with participation from investors like New Wave and notable angel investors. Lago is headquartered in Paris, France, and is expanding its presence in the US.

Lago's core product is an API-first platform that enables businesses to manage complex billing logic, including usage-based, subscription-based, and hybrid pricing models. The platform is built to handle high-volume, event-driven usage metering, processing up to 15,000 events per second. This allows companies, particularly in the AI and IoT sectors, to accurately bill for consumption of resources like tokens, compute hours, or data usage. Key features include real-time usage metering, subscription management, automated invoicing, revenue analytics, and entitlements management. The system supports prepaid credits, one-time charges, and customizable plans, providing flexibility for both self-serve and sales-led business motions.

As an open-source solution, Lago offers businesses transparency and control over their billing infrastructure, allowing them to avoid the "black box" nature of many third-party systems. It provides both a free, self-hosted version and a cloud-based offering. The platform integrates with various payment providers, CRMs, and ERP systems, such as Stripe, Salesforce, and NetSuite. Lago serves a range of clients from startups to large enterprises, including prominent names like Mistral.ai, PayPal, Groq, and Synthesia.