Platform
Real-time metering for flexible pricing.
Billing & invoicing without the headaches.
Entitlements managed directly in billing.
Flexible cash collection for hybrid billing models.
Revenue analytics you can trust, across every stream.
White-label billing for platforms and ecosystems.
AI-powered billing intelligence.
Enterprise billing integrations that scale with you.
Solutions
Bill tokens, GPUs, credits and hybrid models.
Complex billing with full compliance control.
Accurate, compliant billing for finance teams.
Handle complex metering and device-level billing.
Don't build billing from scratch.
Automate accurate invoicing.
All your invoice data in one place.
Ship pricing changes without engineering bottlenecks.
Combine different pricing models.
Meter and bill any usage metric.
Customize plans.
Bill multiple products in one system.
Deploy Lago anywhere.
Developers
Community
Complete API documentation and reference.
Latest updates and version changes.
Comprehensive guides and tutorials.
Contribute to our open source project.
Resources
Learn more about Lago.
Join our team.
Latest news and insights.
Download Lago's playbook on usage-based pricing models.
Enterprise-grade security.
When PayPal wanted to offer billing to merchants on its platform, they didn’t want to build complex billing from scratch and maintain it forever. That’s why they picked Lago. In PayPal’s integrated finance ecosystem, billing was the missing piece. Why It Matters If you're evaluating billing infrastructure in a regulated industry like financial services, PayPal's decision reveals something important: the market has changed. First, complex billing is becoming more important: AI is increasing
Anh-Tho Chuong • 2 min read
Startup Stories
Billing Systems shouldn’t be a nightmare. Discover how Lago makes billing modular, open-source & engineer-friendly to scale pricing without pain.
Finn Lobsien • 5 min read
Product
When you link your bank account to Venmo, you're not using Venmo's technology, you're using Plaid. An Uber sends you a ride notification, that originates with Twilio. Maps in Strava, Doordash or Instacart? Powered by Mapbox. These are some of the most successful software companies ever built, and most of their end users have never heard of them. They don't compete for the spotlight — they disappear inside other people's products. In hardware, this model already has a famous name: TSMC. The Tai
Insights from our customers on how they use Lago to power their billing.
Customer Stories
Finn Lobsien • 2 min read
Introduction 1NCE disrupted the IoT connectivity industry in 2018 with a bold offer: 10 years of global software and connectivity for €10. The model was simple, affordable, and perfectly suited to low-data use cases like smart metering, asset tracking, and street lighting. But as the IoT market evolved, so did customer needs. Many use cases demanded higher data volumes and faster speeds. In response, 1NCE launched High Data IoT: a pay-as-you-go model offering 5€/GB with speeds up to 25 Mb/s. T
Introduction Flipside Crypto's data-driven growth platform helps blockchains attract users, drive engagement and analyze on-chain activity. Their data is freely available, but premium features like API access and Snowflake integration are charged mostly on usage. This required a robust metering and billing solution. Flipside Crypto didn't have a billing system before using Lago. They needed to handle both recurring revenue and usage-based pricing without creating an engineering nightmare or di
Introduction Cerebrium helps AI and ML teams ship more, faster with their serverless infrastructure platform. Infrastructure is one of the core use cases of complex billing: It's rarely charged as a subscription and requires many complexities. Before using Lago, Cerebrium was managing billing in-house with a system built on DynamoDB. But as an infrastructure platform handling high-volume compute workloads, they ran into issues. Their customers needed billing transparency and their engineering
Finn Lobsien • 3 min read
How to build billing systems that don't become engineering nightmares.
Engineering
Most AI features in SaaS are glorified search bars — a chatbot that reads your docs and rephrases the answer. We didn't want to build that. We wanted to build agents that can apply discounts, void invoices, and retry payments. That meant solving problems most companies never face, and it's why we shipped our first AI features in late 2025, long after the first wave of RAG chatbots. Here's what our category taught us about when “easy” is actually hard. What we built and why I've seen enough fe
Raffi Sarkissian • 7 min read
Why we still choose Ruby on Rails in 2025: Learn how Lago scales millions of API events with Rails, Go, and Rust, balancing developer speed, concurrency, and performance.
Learn how we ship fast without breaking self-hosted instances, why bridge versions matter, and why billing infra needs more care than the average SaaS stack.
Playbook
Finn Lobsien • 14 min read
How we think about building billing infrastructure.
The closer your product category is to billing, the more likely you've come to the dangerous conclusion that you should offer billing. This conclusion is dangerous because building billing is a nightmare. I don't just say this because we sell a billing system. I say it because companies from very different verticals come to us saying some variation of the following: "We want to offer billing as a feature to our customers and have spent the past few months building in-house with a few engineers
Why combining entitlements and billing simplifies pricing and monetization without creating more dependencies.
Pricing group keys give you the flexibility to assign distinct prices to a single product based on chosen criteria.
Finn Lobsien • 1 min read
Lessons from the trenches of building and scaling startups.
Anh-Tho Chuong • 6 min read
Lovable crossed $200M ARR in under a year. Replit charges up to $200/month per seat. Base44 got acquired by Wix for $80M. These platforms know how to monetize. Their users don't. The Shopify lesson The obvious pushback: who cares? Most vibe-coded apps are toys. Mostly true. But in 2025, merchant solutions made up over 75% of Shopify's total revenue. Merchant solutions = payment processing, capital lending, shipping. Everything Shopify earns when merchants transact through the platform. Not
Finn Lobsien • 4 min read
Disclaimer: People gave me “AI slop” comments on my latest article. I’m writing this post without AI, together with my co-founder Raffi and our content lead Finn who helped me edit it (“by hand”). A lot of founders ask me whether they should apply to YC, open-source their product or move to SF. I get it, but I think we’re missing the real depth here. There’s pressure to work 996 (9am-9pm, 6 days a week), to be on top of the latest AI thing, to live in the right place, to “get it right”, accor
Anh-Tho Chuong • 9 min read
Stripe paid $1B for Metronome, a competitor to their own billing product. The reason reveals an architectural gap: Stripe Billing maxes out at 1,000 events/sec while modern AI companies need 100,000+. That’s not a feature gap—it’s a fundamental architecture problem.
Anh-Tho Chuong • 8 min read
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