StripeMeter is an open-source usage metering platform designed specifically for SaaS applications, offering transparency in billing and eliminating unexpected charges. This comprehensive tool integrates seamlessly with Stripe to provide real-time tracking of usage with accurate cost projections, ensuring that what customers see aligns perfectly with their invoices.

Key Features

• Real-time Usage Tracking: Monitor usage as it happens, providing live projections of costs to prevent bill shock.
• Exactly-Once Processing: The system guarantees no double billing through idempotent event processing.
• Invoice Parity: Ensures alignment between user visibility and billing by maintaining accuracy within 0.5%.
• Scalability: Built for high performance, featuring sub-minute data freshness and horizontal scaling capabilities.
• Robust Error Handling: StripeMeter has been rigorously tested in production environments.
• User-Friendly Interfaces: Includes an admin dashboard and embeddable customer widgets for seamless integration.
• Developer-Centric SDK: Full-featured SDKs available for Node.js and Python facilitate easy integration into applications.

Unique Approach

StripeMeter distinguishes itself by focusing on three core principles:

1. Customer Transparency: Prioritizes clear billing insights for users.
2. Enhancing Developer Experience: Aims to simplify the process of implementing usage-based pricing models.
3. Community Driven Development: Developed collaboratively, making it suitable for community needs.

Technical Architecture

StripeMeter operates on a reliable architecture with various components:

┌─────────────┐     ┌──────────┐     ┌──────────────┐
│   Clients   │────▶│ Ingest   │────▶│   Events     │
│  (SDK/HTTP) │     │   API    │     │  (Postgres)  │
└─────────────┘     └──────────┘     └──────────────┘
                           │                 │
                           ▼                 ▼
                    ┌──────────┐     ┌──────────────┐
                    │  Queue   │────▶│ Aggregator   │
                    │ (Redis)  │     │   Worker     │
                    └──────────┘     └──────────────┘
                                            │
                                            ▼
                                     ┌──────────────┐
                                     │   Counters   │
                                     │(Redis + PG)  │
                                     └──────────────┘
                                            │
                           ┌────────────────┼────────────────┐
                           ▼                ▼                ▼
                    ┌──────────┐     ┌──────────┐    ┌──────────┐
                    │  Stripe  │     │  Alerts  │    │ Customer │
                    │  Writer  │     │  & Caps  │    │  Widget  │
                    └──────────┘     └──────────┘    └──────────┘

Core Concepts

Events (Immutable Ledger)

Each usage event is stored with a unique idempotency key. Events remain unchanged and any corrections are made through adjustments.

Counters (Materialized Aggregations)

Pre-computed aggregations allow for immediate data updates categorized by tenant, metric, customer, and time period.

Delta Push (Stripe Synchronization)

This mechanism tracks each subscription item, sending only the changes to Stripe, which ensures idempotency regardless of retries.

Reconciliation

Hourly comparisons between local and Stripe-reported usage ensure discrepancies are addressed promptly to maintain accuracy.

Getting Started

Setting up StripeMeter is quick and can be done in under five minutes using the one-command setup feature for automatic installation and configuration. Visitors can also explore a demo of StripeMeter to see its capabilities, including real-time tracking and interactive usage simulations.

Contribution and Community Engagement

StripeMeter encourages community contributions. Users can report bugs, suggest new features, or improve documentation. A simple contribution process is outlined for those interested in getting involved.

Security and Compliance

With a keen focus on data security, StripeMeter operates with multi-tenant data isolation and is designed to ensure compliance with industry standards, maintaining a zero PCI scope as no card data is stored.

Roadmap

Upcoming features include the introduction of a GraphQL API and advanced analytics dashboards, among others—all of which are aimed at continual improvement based on community feedback.

For further information, please refer to the complete documentation and join the community to participate in discussions.