At a Glance:
Flexprice is an open-source monetization infrastructure platform that provides real-time usage metering, credit grants, hybrid pricing plans, feature management, and automated invoicing for AI-native and SaaS companies implementing usage-based billing.
Overview:
Flexprice is a monetization infrastructure platform designed for AI-native and SaaS teams that need usage-based, credit-based, or hybrid pricing models. It provides real-time metering, pricing plan management, credit workflows, feature entitlements, and automated invoice generation. The platform ingests usage events through SDKs or data streams, processes billing logic including prepaid credits and promotional credits, enforces feature limits based on customer plans, and generates invoices tied to tracked usage. Flexprice integrates with existing payment processors, CRM, CPQ, and accounting tools rather than replacing them. It is open-source and self-hostable, with an API-first design aimed at developers who need flexible billing without building custom metering and invoicing infrastructure from scratch.
Key Decision Points:
Self-hostable open-source platform: Flexprice can run on your own infrastructure, with source code available for inspection and extension, avoiding third-party billing platform lock-in.
API-first integration model: Applications send usage events via SDKs, and Flexprice handles aggregation, metering, credit application, and invoice calculations automatically.
Composable with existing billing stacks: Rather than replacing your current billing provider like Stripe or Chargebee, Flexprice augments them by managing usage data, pricing rules, credits, and entitlements alongside your existing workflows.
Hybrid pricing model support: The platform accommodates seat-based subscriptions, pure usage-based billing, tiered plans, prepaid credits, free tiers with overage, and combinations of these models without schema migrations.
Requires infrastructure components for self-hosting: Running Flexprice from source or via Docker Compose requires PostgreSQL, Kafka, ClickHouse, and Temporal, which adds operational complexity.
Core Features:
Real-time Usage Metering: Define custom usage events at a granular level (API calls, compute time, database queries) and track them in real time, with aggregation capable of handling millions of events at peak load.
Credit Grants System: Built-in support for prepaid credits and promotional credits, including automatic top-ups at thresholds, credit expiration, and wallet management without custom logic.
Flexible Pricing Plans: Design and modify pricing models including seat-based subscriptions, pay-as-you-go, volume-tiered pricing, and hybrids, with per-customer overrides and plan versioning.
Feature Management: Define feature toggles, metered feature limits, and configuration values tied to plans, allowing applications to enforce usage limits and feature access by checking with Flexprice.
Automated Invoicing: Generate invoices based on real-time usage data, subscriptions, and applied credits, with automated handling of proration, overages, and billing cycles.
Use Cases:
AI-native companies implementing usage-based or credit-based pricing for API calls, compute time, or agent interactions who need real-time metering and billing.
SaaS teams transitioning from simple seat-based subscriptions to hybrid pricing models that combine subscriptions with usage charges, prepaid credits, and feature gating.
Developers who want to avoid building custom metering infrastructure and invoice calculation logic from scratch, and who prefer an open-source, self-hostable billing component that integrates with existing payment and CRM tools.
Engineering teams that need to enforce feature entitlements and usage limits per customer plan directly within their application, without maintaining custom entitlement logic.
Open-Source Alternative Value:
Flexprice provides an open-source, self-hostable option for teams that need billing infrastructure beyond what closed-source SaaS billing platforms offer for usage-based and credit-based pricing. The platform's composable architecture means it can augment existing billing providers like Stripe or Chargebee rather than requiring replacement, which preserves current payment workflows and customer touchpoints. Developers can inspect the codebase, extend functionality, and run the platform on their own infrastructure, avoiding reliance on third-party billing platforms that may charge revenue-based fees or limit customization. The combination of real-time metering, built-in credit systems, feature management, and automated invoicing addresses common pain points that otherwise force developers to build and maintain custom billing logic.
