Flexprice

Flexprice is monetization infrastructure for AI-native and SaaS teams that charge by usage, credits or a mix of models. It handles metering, pricing, credits and billing so developers do not need to build custom billing logic for every pricing change.

Applications send usage data to Flexprice from backend APIs, AI agents or custom workflows, or stream it from data warehouses and analytics pipelines. Flexprice processes the data in real time, prices usage according to the customer's plan, deducts prepaid or promotional credits, applies feature limits and produces invoices. It then connects to existing payment, CPQ, CRM and accounting tools, such as Stripe, to push invoices and revenue data onward. A no-code interface is included.

The project is written in Go, uses ClickHouse, Kafka, PostgreSQL and Temporal according to its repository topics, and is licensed under AGPL-3.0. It can be used as a cloud service or self-hosted, and documentation, a demo and a Slack community are linked from the README.