Home / Founders / Anh-Tho Chuong
Chuong is building Lago as open-source billing infrastructure so companies can meter AI usage without choosing between a black-box vendor and a homegrown nightmare.
Anh-Tho Chuong is co-founder and chief executive of Lago, an open-source usage-based billing company in Paris, France. She founded Lago with Raffi Sarkissian, who serves as chief product officer.
Watching Billing Consume Engineering Teams
On Lago's About page, Chuong describes seeing a billing nightmare at a large European fintech: more than ten full-time engineers on billing, product teams waiting months for pricing changes, and finance stuck in spreadsheets. Building in-house was painful; buying a closed vendor created a black box.
Choosing Open Source for Lago
She and Sarkissian made Lago open source so teams could inspect and control financial infrastructure while still getting vendor-grade features. The company offers self-hosted and cloud options, with Lago Premium for support and advanced capabilities, as outlined on the About page.
Serving AI Companies That Meter Usage
Lago meters events, applies pricing, manages credits, and issues invoices for API and AI products. Customer stories feature companies such as Mistral AI that needed token-based billing without diverting model engineers into billing projects.
