#4747th of 102 in Backends, databases and hostingFor finance and business, finance and accounting
flexprice
Usage-based billing and metering API with credits, plans and invoicing
- Stars
- 6.9k
- License
- AGPL-3.0
- Last commit
- Nov 2026
- Last release
- Nov 2026
- Language
- Go
3,417 on 21 Apr 20266,875 on 10 Nov 2026
From GitHub's daily star counts.
Checked on GitHub.
Overview
Flexprice is a Go billing backend that ingests usage events through an API or SDKs (Go, Python, JavaScript) and meters them in real time. It prices them against plans, applies prepaid or promotional credits, enforces feature entitlements and generates invoices. It can sync to payment, CRM and accounting tools, and runs on PostgreSQL, Kafka, ClickHouse and Temporal.
Who it is for: Teams self-hosting usage-based or credit-based billing for AI and SaaS products
Strengths
- Covers usage, seat, tiered, prepaid-credit and hybrid pricing with per-customer plan overrides
- Includes wallets, credit grants, auto top-ups and feature entitlements alongside invoicing
- SDKs for Go, Python and JavaScript; make dev-setup starts the full stack via Compose
- Can layer on existing providers such as Stripe or Chargebee instead of replacing them
Weaknesses
- Heavy infrastructure: PostgreSQL, Kafka, ClickHouse, Temporal and Redis all required
- Open core: ee and internal/ee directories need a commercial license
- AGPL-3.0 core may conflict with some company policies on network-served code
- README gives no production deployment, sizing or throughput figures
What it needs
- no GPU
- Docker + Compose
- Needs PostgreSQL, Kafka, ClickHouse, Temporal, Redis, Docker Compose
- port 8080
Quick answers
Is flexprice open source?
Yes. Its code is on GitHub under the AGPL-3.0 license.
Can you run flexprice with Docker?
Yes. Its repository has a Docker setup: a Dockerfile, a Compose file or a published image.
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