Open Source License
Understand ZK Stack open-source licensing.
The ZK Stack is open-source software available under permissive licenses. Organizations can freely use, modify, and deploy ZK Stack components.
License Terms
ZK Stack components are dual-licensed under:
- MIT License
- Apache License 2.0
Choose either license based on your project requirements. Both licenses permit commercial use, modification, and distribution.
What's Included
The following components are covered under the open-source licenses:
- ZKsync OS node and sequencer
- Airbender Prover
- Smart contract system
- Portal and Bridge
- Block explorer (open-source version)
- SDKs & CLI tools
Source Code
Access the source code on GitHub:
Commercial Extensions
Some products built on ZK Stack have separate licensing terms:
- Prividium™: Commercial license required for permissioned chain components.