# Lago

> Lago is an open-source billing and metering platform that lets companies build usage-based, subscription, and hybrid pricing models without building a homegrown billing stack from scratch. Founded in 2021 by two early Qonto employees, it offers a free, self-hostable core plus managed cloud tiers, and is used by companies such as Mistral AI, PayPal, Groq and Synthesia to meter events and issue invoices at scale.

- **Founded:** 2021
- **Headquarters:** Paris, France / San Francisco, California
- **Founders:** Anh-Tho Chuong (CEO & Co-founder), Raffi Sarkissian (Chief Product Officer & Co-founder)
- **Team size:** ~53 employees
- **Products:** Lago Metering, Lago Billing & Invoicing, Lago Entitlements, Cash Collection, Revenue Analytics
- **Notable:** Recognized as the #1 open-source billing platform, with 10k+ GitHub stars., Raised $22M from FirstMark, SignalFire and Y Combinator., Issues an estimated $800M+ in invoices per month across its user base.

## Products & services

- **Lago Metering** — Real-time event ingestion and aggregation engine supporting seven aggregation methods (COUNT, COUNT_UNIQUE, LATEST, MAX, SUM, WEIGHTED SUM, CUSTOM) and multi-dimensional metering at up to 1M events/second.
- **Lago Billing & Invoicing** — Automated, compliant invoice generation for usage-based, subscription and hybrid pricing, including progressive billing, coupons, credit notes and prorated charges.
- **Lago Entitlements** — Feature-access management tied to billing plans, controlling what customers can use based on their subscription.
- **Cash Collection** — Payment orchestration with dunning and automatic retries across payment providers.
- **Revenue Analytics** — MRR tracking, revenue visibility and reporting on top of billing data.
- **Lago AI** — AI-powered billing intelligence layer aimed at complex, AI-native revenue models.
- **Lago Embedded** — White-label billing capabilities that let platforms embed Lago billing into their own products.

## Achievements

- Recognized as the #1 open-source billing platform, with 10k+ GitHub stars.
- Raised $22M from FirstMark, SignalFire and Y Combinator.
- Issues an estimated $800M+ in invoices per month across its user base.
- Powers billing for Mistral AI, PayPal, Groq and Synthesia.
- Y Combinator Summer 2021 batch.
- SOC 2 Type II certified.
- Enabled Mistral AI to go from signing to live billing in 52 days.

## Latest updates

- **2024-03** — Announced $22M in total funding, including a $15M Series A led by FirstMark Capital.
- **2024** — Published case study on Mistral AI launching paid billing on Lago in 52 days and sending 32,000+ invoices.
- **2025** — Launched Lago AI and Lago Embedded, expanding into AI-native billing intelligence and white-label billing.
- **2026** — Building e-invoicing compliance engines starting with French electronic invoice formats ahead of the 2026 mandate, and overhauled pricing into Business and Enterprise tiers.

## Links

- Website: https://getlago.com
- LinkedIn: https://www.linkedin.com/company/getlago
- Twitter/X: https://twitter.com/GetLago
- GitHub: https://github.com/getlago/lago

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Profile page: https://yespress.io/lago
Published by YesPress — https://yespress.io
Last updated: 2026-07-14