Lago

Open-source metering and usage-based billing platform trusted by AI, fintech and IoT companies for complex pricing and monetization.

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About Lago

At Lago, we're on a mission to make billing simpler, more transparent, and more adaptable for SaaS companies.

As the leading open-source billing platform, we empower businesses to build flexible pricing models and scale with confidence. We've raised over $22 million in funding from top-tier investors including Y Combinator and FirstMark, reflecting strong confidence in our vision and growth.

Our platform has garnered over 9,000 stars on GitHub, a testament to our active and growing developer community. Companies such as PayPal, Synthesia and Mistral.ai choose Lago for their billing.

We're a team of ambitious, focused individuals who work together to solve hard problems with excellence and accountability. At Lago, we value reliability and proactivity - we trust each other to own tasks, drive them to completion, and adapt quickly. While we encourage you to try fast and "fail fast", we also expect you to learn fast: make mistakes, but don't make the same one twice.

If you're excited by challenges and want to grow alongside a high-performing, supportive team, this is the place for you.

Products

Lago
AP, AR & ExpensesFree plan
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The AI-native billing platform that gives teams full transparency, control and flexibility to manage and scale any pricing model.

What customers say

“Everything that we had to do manually before is now in an automated flow and in one place. That makes it super easy to use. We solved all this manual effort that was needed before.”

Mark BongardtLago customer

“The value of our products is directly tied to how much customers use it. We knew we needed to charge on usage so we needed a vendor that could help with that. Lago gave us the ability to build plans and charge based on usage right out of the gate.”

Kyle FugereLago customer

Lago reports that Lune sends usage data into its platform to connect metering, prices, subscriptions and customers. The story claims three months of engineering saved and pricing changes without engineering resources.
Case study
Lago reports that Cerebrium uses millisecond-level compute metering, multidimensional pricing, separate environment invoices and payment-failure webhooks, reducing manual billing work and supporting custom enterprise…
Case study
Lago reports that Laravel Cloud uses its metrics, charge filters, wallets and API-driven pricing reconciliation. The story reports around 80 million usage events monthly and tens of thousands of invoices through Lago.
Case study

Security and compliance

As reported by Lago. Ask for audit reports before you buy.

SOC 2 Type IICompliant
GDPRCompliant

RBAC (Role-Based Access Control)
Audit Logs
Data Encryption (Rest and Transit)
AWS KMS

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Latest updates from Lago

Jul 232026

Product launch

Lago Releases API v1.2.0 with Expanded Filtering Capabilities

Lago has released version 1.2.0 of its API, introducing a new "filters" system to replace the previously used "group" dimension structure. This update allows for infinite dimension depth, performance improvements for real-time usage data, and improved scalability for event ingestion. The update also mandates the use of the `external_subscription_id` field in event payloads, which is required for all new event integrations to enable real-time billing functionalities. Users are required to update their existing integrations to accommodate these structural shifts.