License
Antimatter uses a multi-licensing strategy to balance open-source freedom, upstream compliance, and protection of the core infrastructure.
Depending on which part of the repository you are looking at, different licenses apply. If no specific LICENSE file is present in a sub-directory, it inherits the license of its closest parent directory.
Core Infrastructure
Section titled “Core Infrastructure”License: GNU Affero General Public License v3.0 (AGPLv3)
Applies to: The root repository, core/, and gateway components.
The core tunneling and encryption infrastructure is protected by the AGPLv3. This ensures that anyone who modifies the gateway and hosts it as a network service (SaaS) must open-source their modifications. This protects the project from being exploited as a closed-source proprietary service while guaranteeing the code remains free and open for the community.
Mobile Apps
Section titled “Mobile Apps”License: GNU General Public License v3.0 (GPLv3)
Applies to: android/ and ios/
If you distribute a modified version of the Antimatter mobile app, you must also distribute your source code under the GPLv3.
Adapters & SDK
Section titled “Adapters & SDK”License: MIT License
Applies to: adapters/
To encourage maximum adoption and flexibility, the adapter integrations and SDKs are permissively licensed. This allows individuals and corporations to build proprietary, closed-source integrations linking their own AI agents (like Claude Code or internal company bots) to Antimatter without being legally forced to open-source their proprietary agents.
Documentation
Section titled “Documentation”License: MIT License
Applies to: docs-site/
The documentation site and its contents are freely available under the MIT license.