Lago
Lago is an open-source, API-first billing and monetization platform that turns product usage into pricing, credits, entitlements, invoices, payments and revenue workflows. It aims to give companies the flexibility and transparency of a homegrown billing system with the capabilities of an enterprise vendor.
At a Glance
- AI and machine-learning companies
- Developer tools and API businesses
- B2B SaaS and product-led software companies
- Fintechs and banks
- +3 more
AI Tools by Lago
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Lago
Open Source Usage Billing Platform
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Latest News
Lago announced Agent SDK price mode for billing the dollar cost of LLM calls with merchant margin built in.
Lago published its AI Agent Monetization guide covering five pricing models for AI agents.
Lago published its self-hosted billing deployment guide, including Kubernetes/Helm production deployment options.
Lago published a 2026 REST API design guide for billing systems.
Products & Services
Managed billing infrastructure for subscriptions, usage-based and hybrid billing; Lago operates the service while customers integrate their application and payment provider.
AGPLv3-licensed billing platform that customers can run on their own infrastructure, including controlled or air-gapped environments.
Embedded and white-label billing capabilities for platforms and ecosystems that monetize their own customers.
Python and JavaScript/TypeScript SDKs that capture LLM token usage and can calculate model cost, apply markup and send billable events to Lago.
Market Position
Lago positions itself as an open-source, developer-first and payment-processor-agnostic alternative to proprietary usage-billing and subscription platforms such as Stripe Billing, Chargebee, Recurly, Metronome and Orb. Its differentiators are auditable/self-hostable infrastructure, API-first extensibility, support for complex hybrid pricing and the option of managed Cloud deployment.
Leadership
Founders
Anh-Tho Chuong
Co-founder and CEO; previously worked at Qonto and is an alumna of Y Combinator and McKinsey.
Raffi Sarkissian
Co-founder and CPO; previously worked with Anh-Tho Chuong on Qonto's billing system and helped start the company after their experience building billing at the fintech.
Executive Team
Anh-Tho Chuong
CEO & Co-founder
Previously at Qonto and McKinsey; YC alumna.
Raffi Sarkissian
CPO & Co-founder
Co-founder who previously worked on Qonto's billing system with Chuong.
Board of Directors
Founding Story
The founders saw a billing nightmare while working at Qonto: more than ten engineers were maintaining billing, product teams waited months to change pricing, and finance relied on spreadsheets. They started Lago because building billing in-house was costly while conventional third-party systems were opaque; open source offered transparency, control and a composable alternative.
Business Model
Revenue Model
Lago monetizes managed Lago Cloud subscriptions and enterprise commercial plans, with pricing quoted according to billing volume, event volume, plan tier, deployment and support requirements. The self-hosted open-source product is available at no license cost under AGPLv3; premium capabilities and support are commercial offerings.
Pricing Tiers
Lago Cloud plan; current commercial terms are quote-based.
Lago Cloud plan; current commercial terms are quote-based.
Lago Cloud plan; current commercial terms are quote-based.
Lago Cloud plan; quoted according to volume, deployment and support requirements.
AGPLv3 software; the customer operates and maintains the deployment.
Target Markets
- AI and machine-learning companies
- Developer tools and API businesses
- B2B SaaS and product-led software companies
- Fintechs and banks
- IoT and telecom companies
- Enterprises with complex or negotiated pricing
- Usage-based billing for APIs, AI products and developer tools
- Hybrid subscription plus consumption billing
- Enterprise plans and negotiated contracts
- Fintech and banking billing
- IoT and telecom device-level metering
- Embedded billing for platforms and marketplaces
- Mistral AI
- PayPal
- CoreWeave
- Groq