Lago

Platform

Open-source metering and billing engine for usage-based and hybrid pricing

Price: Free, open source; Cloud by quote
Access: API key

About

Open-source billing platform that turns usage events into invoices for usage-based, subscription and hybrid pricing. Self-host the AGPL-3.0 code with Docker, or use Lago Cloud in the US or EU. Payments go through connected providers such as Stripe or Adyen.

What you can do with it

Ingest usage events and aggregate them into billable metrics
Price plans with usage, seats, prepaid credits, commitments and fixed fees
Generate invoices and show customers their current usage in real time

Get started

Self-host with Docker Compose or sign up for Lago Cloud
Create an API key
Create a billable metric, a plan and a subscription

Example

curl -X POST https://api.getlago.com/api/v1/events \
  -H "Authorization: Bearer $LAGO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"event": {"transaction_id": "txn_0001", "external_subscription_id": "sub_1234567890", "code": "api_calls", "properties": {"custom_field": 12}}}'

Details

Hosting: Hosted service, Self-hosted
Available in: Worldwide
Official SDKs: JavaScript/TypeScript, Python, Ruby, Go
MCP server: Local