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Open-Source Subscription Billing & Payments Platform

推量牛 BullFlow — 开源企业级 RAG 解决方案：从企业知识库、营销内容自动化生产到全域内容分发 | Open-source enterprise RAG solution: knowledge base → automated marketing content → omnichannel publishing. 知识库全链路本地开源模型，无需付费模型；AI Agent 创作图文 / 图片 / 视频，一键发布抖音、小红书、公众号、LinkedIn、YouTube 等 17 个平台。Commercial-grade, multi-tenant, billing & admin built in. MIT

Ubilling is an open-source billing system designed for Internet service providers (ISPs). It provides tools for managing subscribers, handling payments and creating detailed reports. Ubilling allows control and monitoring of a wide range of network equipment and can be easily extended with custom functionality.

daloRADIUS is an advanced RADIUS web management application for managing hotspots and general-purpose ISP deployments. It features user management, graphical reporting, accounting, a billing engine, and integrates with OpenStreetMap for geolocation. The system is based on FreeRADIUS with which it shares access to the backend database.

The application framework for vertical AI SaaS — auth, workspaces, billing, credits, execution boundary, page registry. You build the agent.

All in One PSA for MSPs, which Unifies client, contact, vendor, asset, license, domain, ssl certificate, password, documentation, file, network and location management with ticketing and billing capabilities, with a client portal on the side.

Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

Open Source Metering and Usage Based Billing

Open Source Metering and Usage Based Billing

Empower your hosting business with FOSSBilling, the free and open-source solution for efficient billing and client management.

Teams, personal accounts, permissions and billing for your Supabase app

Polar — A billing platform for the intelligence era

Usage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature access

Autumn is an open-source pricing & billing platform

Modern Billing & Monetization UI Components Library

📶 A fast, automated Hotspot Billing system powered by M-Pesa STK Push for instant, secure user access. Built with Node.js, MySQL, Next.js, and React, it delivers smooth payments, smart access control, and optional MikroTik-RB750UPr2 integration. ⚡🔐

A minimalist, self-hosted AI bot for automated billing ingestion and FIRE financial planning.

The billing framework for TypeScript. Products in code, handles Stripe, webhooks, and usage state, runs in your app.

Free invoice builder & GST billing software for India. Make GST invoices, quotations, bills of supply and credit notes as PDF; GSTR-1/3B reports. Free invoice maker for shops, freelancers & small businesses. Free Tally alternative: open source, 100% offline, no signup, no limits.

Route OpenClaw API requests through Claude Code subscription billing instead of Extra Usage

From code to cash — open-source SaaS boilerplate with Stripe, affiliate, attribution & usage-based billing for AI apps. T3 stack + Next.js 16.

Reusable AI coding workflows for Claude Code and VS Code to ship auth, billing, and landing pages faster.

An enterprise AI workspace for model routing, multimodal chat, files, tools, billing, identity, and operations.

Chinese-first open-source WMS starter for cross-border warehouse, fulfillment, inventory, billing, returns, and 3PL operations.

Optimize Hitech Billing Operations with 2026 Enhanced Productivity Suite

Reverse engineered Windows Copilot into an OpenAI-compatible API. Access GPT-4 and GPT-5 models through a simple REST interface without API keys or billing.

oneapi-pro is an enterprise-grade AI API Gateway built on oneapi（one-api）. It has undergone a full architectural redesign, adding support for subscription plans, active-active clusters, precise billing. 本项目与new-api | sub2api不同之处是oneapi-pro是面向企业AI网关的应用场景，并不适用于中转站