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Lago

Open Source Metering and Usage Based Billing

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About Lago

Lago is the open-source alternative to Stripe, with a laser focus on transparency, metering, developer experience, and composability: addressing complex pricing grids and business workflows. Their team previously built and scaled the home-grown billing system of Qonto (a B Fintech in Europe), from pre-launch to the tens of millions of MRR.  Lago is the leading open-source repository and community in this space.

What Lago does

Lago is an open-source billing platform for usage-based, subscription, prepaid, and hybrid pricing. It meters tokens and other usage, combines it with subscriptions and credits, and turns it into itemized invoices. It is built for AI product teams and used by companies like CoreWeave, Mistral AI, and PayPal. Teams can self-host it for free under an AGPLv3 license or use the managed cloud. Premium features, like AI assistants and advanced security, are priced on request.

Key features

  • Meters AI token usage per customer
  • Generates itemized invoices from usage
  • Supports prepaid credits and entitlements
  • Self-hostable under AGPLv3 license
  • Integrates with payment processors like Stripe
  • Offers AI billing and finance assistants

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