What is Fluxrate?
Fluxrate is a comprehensive billing platform that gives engineering teams the primitives they need to implement any pricing model without building billing logic from scratch. Whether you charge a flat monthly fee, bill per API call, or combine both in a hybrid plan, Fluxrate handles the metering, subscription lifecycle, invoice generation, and customer management so you can focus on your product.Product Capabilities
Any Pricing Model
Any Pricing Model
- Fixed - Flat recurring charges billed daily, weekly, monthly, or yearly
- Usage-based - Charge per unit consumed with different calculation logics
- Hybrid - Combine Fixed base fees and Usage charges on a single plan
- Tiered Pricing - Volume-based pricing tiers for usage charges
Real-time Usage Analytics
Real-time Usage Analytics
Create metered feature to track (API calls, storage, tokens, seats, etc.) and insight on customer usage realtime.
Automated Invoicing
Automated Invoicing
Invoices are generated automatically based on subscriptions. Providing invoice link with custom branding.
Features (Entitlements)
Features (Entitlements)
Control exactly what each plan unlocks meter-based limits, boolean feature flags, or custom entitlement values.
Customer Portal
Customer Portal
Embed a customer-facing portal in your product so your customers can view invoices and usage.
How It Works
- Define Features - Create metered feature that define what to track (e.g.,
api_calls,storage_gb,active_users), Boolean & Custom value featured. - Create Plans - Combine features with limit and add Flat and Usage based charges with overages.
- Subscribe Customers - Assign customers to plans with a start date and billing interval.
- Track Usage - Send usage events via the SDK or REST API.
- Invoicing - Fluxrate automatically computes usage, generates invoices, and emails to your customers.
- Payments - Fluxrate provide multiple payment gateway integration that suits your business need.
Pricing Models Supported
| Model | Description | Example |
|---|---|---|
| Fixed | Flat recurring fee | $99/month SaaS subscription |
| Usage-based | Pay per unit consumed | $0.001 per API call |
| Hybrid | Fixed + usage combined | 49/monthbase+49/monthbase+0.005/GB storage |
| Tiered | Volume brackets for usage | First 1,000 calls free, then $0.001 each |
Next step
Quickstart
Get your first usage event tracked in under 5 minutes.
Core Concepts
Understand meters, plans, subscriptions, and how they connect.
API Reference
Full REST API documentation with examples.
SDK Guide
Integrate usage tracking into your backend in minutes.