Keygen is a modern, fair source software licensing and distribution API. For developers, by developers.
Software licensing and registration using digital signatures and public cryptography 🪪
Faveo Invoicing is an open-source platform for SaaS billing and license management, tailored to meet the needs of software companies.
📊 ScanCode Workbench is a desktop app to review and conclude license and origin from code scans generated by ScanCode Toolkit.
Open source license management platform. Subscriptions, perpetual, trials, floating licenses, usage metering, Stripe payments, team seats, and admin dashboard. Self-hosted alternative to Keygen & Cryptlex. One binary, one database.
Keygen reference SDK for Go. Integrate license activation, automatic updates and offline licensing for Go binaries.
JWT based remote licensing server.
Top Easy Digital Downloads Licensing Plugins 2026 – Best Paid Software Protection
An example of how to implement software licensing and device activation in an Electron application
Universal crypto-first platform for payments, subscriptions and software license management
Protect your closed source software with commercial licenses.
🔐 Lukittu is a simple yet powerful open-source licensing management and distribution software designed to protect your applications.
A library for generating and verifying license keys.
Cool links, tools & papers related to Open Source Licensing
Digital License Signatures & Verification
Software License Manager: Docker deployable Flask REST API server with MongoDB database, simplifying software license management for easy integration and efficient tracking
An example implementation of offline activation for air-gapped machines using QR codes, signed and encrypted license files, and a mobile device.
Example of reading hardware identifiers (volume serial, computer name, CPUID) for software licensing in C++.
An example Node.js app that integrates Keygen with Paddle for accepting payments.
Client API to access the functionality of Cryptolens Web API
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