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Lago

Open-source billing infrastructure for usage-based models

As of 29 August 2026, Lago is free to use. Lago is an API-first, open-source billing platform that combines real-time usage metering, subscriptions, hybrid pricing, prepaid credits, entitlements, invoicing, and payment orchestration. Softwr lists it under Accounting. Lago is available on Web, Self-hosted.

Overview

What Lago does

Lago is an open-source billing platform designed for AI, SaaS, fintech, IoT, and infrastructure companies requiring flexible, high-volume billing solutions without vendor lock-in. Built on an API-first architecture, Lago combines real-time usage metering across API calls, tokens, compute, storage, seats, and custom dimensions with support for multiple pricing models including subscription, usage-based, prepaid, and hybrid approaches. The platform handles automated invoicing, taxes, credit notes, and multi-currency support, with entitlements tied directly to plans. Lago offers deployment flexibility with options for cloud hosting, VPC, on-premise, or self-hosted configurations. The open-source codebase is available under the AGPLv3 license, and the company has raised $22 million in funding from tier-1 investors including Firstmark Capital, SignalFire, and Y Combinator.

What people use it for

  • Building usage-based billing for high-volume APIs and infrastructure
  • Implementing metered billing for AI and tokenized services
  • Creating subscription and hybrid pricing models
  • Managing multi-currency billing for global companies
  • Maintaining billing infrastructure without vendor lock-in

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Lago.

  • Free tier limited to 10,000 entities per month with 5M event cap
  • No specific pricing published for Pro annual plan or Scale plan
  • Self-hosted and on-premise deployments require engineering resources
  • Community support only on free tier
  • Scale plan requires annual contracts and sales engagement

Cross-shopped

What people choose instead of Lago

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

  • Lago logo
    Lago
    vs
    Metronome logo
    Metronome

    Metronome: Usage-based billing platform with focus on monetization and pricing strategy

  • Lago logo
    Lago
    vs
    Stigg logo
    Stigg

    Stigg: Credits and entitlements platform for managing usage-based pricing

  • Lago logo
    Lago
    vs
    Orb logo
    Orb

    Orb: Billing and metering platform for SaaS companies

Pricing

What Lago costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Build (Free)

Free

  • 10,000 managed entities per month
  • 5M usage events per month
  • 1K events per second rate limit
  • Full credits and entitlements engine
  • Stripe integration
  • HubSpot integration

Pro

$399 /mo

  • 10,000 entities included (graduated pricing to 100K)
  • 25M usage events included (to 500M with graduated rates)
  • 10K events per second (upgradeable to 100K)
  • Custom-branded widgets
  • Unlimited products
  • Webhooks and full audit logs

Scale

On request

  • Custom entity and event volumes
  • 50K events per second (upgradeable to 100K)
  • RBAC and SSO (SAML)
  • Multiple billing integrations
  • Premium support (1-hour SLA)
  • 99.99% uptime SLA

Capabilities

Features

  • Real-time usage metering

    Track usage across API calls, tokens, compute, storage, seats, and custom dimensions

  • Multiple pricing models

    Support for subscription, usage-based, prepaid, and hybrid pricing approaches

  • Automated invoicing

    Generate and manage invoices with tax calculation and credit notes

  • Prepaid credits

    Implement wallet and credit systems with prepaid billing models

  • Entitlements

    Tie entitlements directly to plans and manage feature access

  • Multi-currency support

    Handle billing in multiple currencies with automatic conversion

  • Payment orchestration

    Integrate with Stripe, Adyen, and other payment providers

  • Revenue analytics

    Built-in analytics and audit logs for revenue tracking

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

Can I use Lago open-source for free?

Yes, Lago is open-source under the AGPLv3 license and can be self-hosted. The cloud-based Build plan is also free with limits of 10,000 entities and 5M events per month.

Source
What payment providers does Lago integrate with?

Lago integrates with Stripe and Adyen for payment processing. It is not a payment processor itself but orchestrates payments through these providers.

Source
Does Lago support multiple currencies?

Yes, Lago supports multi-currency billing with automatic currency conversion for global businesses.

Source

Behind it

Who makes Lago

Company
Lago
Founders
Anh-Tho Chuong, Raffi Sarkissian
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Keep looking

Where to go from Lago

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Softwr does not host reviews and shows no star rating for Lago, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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