saas-billing

💰 Billing & Payments knowledge for cloud platforms

Faveo Invoicing is an open-source platform for SaaS billing and license management, tailored to meet the needs of software companies.

Open-source subscription, usage-based and AI billing: plans, metering, AI model prices, prepaid credits, invoices, tax, dunning, checkout and MRR, on your own payment gateway.

Order & invoice management for Symfony, ideal for SaaS, services, and digital products.

Advanced billing engine for Laravel: subscriptions, proration, usage metering, addons, credit notes, and pluggable invoice/tax drivers on PostgreSQL. Built for SaaS, IaaS, and usage-based products.

Multi-tenant SaaS billing platform with schema-first contracts, idempotent write flows, webhook replay handling, and asynchronous invoice processing.

Typed Python tenant admission decisions backed by Infrai account usage reads.

MCP server: Lemon Squeezy + Gumroad + Polar + Stripe revenue, one Claude-queryable view.

Production SQL relational key join pipeline linking customer identities with subscription order ledgers for high-velocity SaaS billing audits.

Typed Node service that onboards tenants, meters account usage, and runs a safe billing cutover from Stripe metering plus custom counters.

Single-binary Go service that onboards tenants, tracks account lifecycle state, and exports a metered SaaS account statement as PDF.

AI-native billing, pricing, payments and tax infrastructure for AI and agent companies.

Stripe → XRechnung (EN 16931) starter kit for SaaS: BT field map, KoSIT-validated UBL example, failure cases, CI

Subscription management for togo — plans, trials, subscribe/cancel/change, over the payment plugin

FastSpring — independent third-party profile of a public API surface, by API Evangelist. FastSpring is a full-service ecommerce and merchant-of-record platform for SaaS, software, and digital product companies, handling global payments, tax compliance, subscription billing, checkout, and revenue management.