A complete commercial software licensing framework — VPS-based license API, machine binding, plan enforcement, integrity protection, Python SDK, and a one-command installer — all running on $15/month infrastructure.
ZLF is a self-hosted licensing system for commercial software.
It provides:
• a licensing API server
• machine-based license binding
• plan enforcement
• integrity protection
• a Python SDK
• and a one-command installer
The entire system can run on a small VPS costing about $15/month.
You deploy it, control it, and integrate it into your software.
No external licensing SaaS required.
Feature-based licensing for SaaS products
Machine-bound licenses to prevent software piracy
Licensing backend for developer tools and SDKs
Subscription validation for SaaS platforms
Licensing system for commercial APIs
Software licensing for products built by development agencies
License enforcement for on-premise enterprise software
Per-server or per-installation licensing for infrastructure tools
Licensing framework for commercial Python applications


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