GitHub stars · StarDay

1getlago / lagoOpen Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analyticsGoAGPL-3.0 · Share derivative source10,770

2akaunting / akauntingOnline accounting software for bookkeeping and financial management.PHPLicense not declared10,281

3ever-co / ever-gauzyBusiness management platform covering ERP, CRM, HRM, recruiting, and project management.TypeScriptAGPL-3.0 · Share derivative source8,707

4hexclave / hexclaveThe user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.TypeScriptLicense not declared6,886

5flexprice / flexpriceUsage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature accessGoAGPL-3.0 · Share derivative source6,872

6killbill / killbillOpen-Source Subscription Billing & Payments PlatformJavaApache-2.0 · Permissive5,844

7InvoicePlane / InvoicePlaneA self-hosted open source application for managing your invoices, clients and payments.PHPLicense not declared3,278

8openmeterio / openmeterMetering and Billing for AI, API and DevOps. Collect and aggregate millions of usage events in real-time and enable usage-based billing.GoApache-2.0 · Permissive2,439

9itflow-org / itflowAll 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.PHPAGPL-3.0 · Share derivative source1,054

10ledgersmb / LedgerSMBDouble-entry accounting & ERP for the webPerlLicense not declared575

11Ctrlpanel-gg / panelFree, easy-to-use billing solution for hosting providers with seamless Pterodactyl Panel integrationPHPMPL-2.0 · Share derivative source504

12aviabird / gringottsA complete payment library for Elixir and Phoenix FrameworkElixirMIT · Permissive503

13cartalyst / stripeA comprehensive PHP Library for the Stripe.PHPBSD-3-Clause · Permissive278

14poowf / invoicenekoAn Open Sourced Invoice System developed for anyone who needs to generate out an invoice and manage clientsPHPLicense not declared270

15nightflyza / UbillingUbilling 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.PHPGPL-2.0 · Share derivative source187

16joshnuss / commerce_billingA payment processing library for ElixirElixirMIT · Permissive183