OpenMLS

At Phoenix R&D, we are passionate about enhancing the security and privacy of digital communications. Our approach is to get involved in specification work to design standards that impact technology globally, develop implementations to turn those standards into working software code, and finally building applications on top of those standards.

What is OpenMLS?

OpenMLS is our reference implementation of the Messaging Layer Security (MLS) protocol. This high-performance library is:

• Written in pure Rust for maximum security and memory safety

• Licensed permissively under MIT to ensure broad accessibility

• Cross-platform compatible with all targets supported by the Rust standard library, including:

  • Android

  • iOS

  • Windows

  • Linux

  • macOS

  • WebAssembly

Building a stronger secure messaging ecosystem

We work collaboratively with industry partners, academic institutions, and open-source communities to strengthen the secure messaging ecosystem through research and standardization. Our goal is to make end-to-end encryption accessible and implementable for developers worldwide.

Key features

The OpenMLS software library serves as a foundational building block for applications requiring end-to-end encrypted messaging. It offers:

• Safe and intuitive API that abstracts away complex cryptographic operations

• Efficient performance even for large group communications

• Post-quantum readiness through cipher suite agility

• Comprehensive documentation for easy integration

Get started

Check out our code and documentation to learn more about using the OpenMLS library in your projects.

Work with us

Our team has been active in the secure messaging field for over a decade. If you're interested in implementing OpenMLS in your application, contact us to discuss how we can support your project through:

• Consulting services for MLS and messaging architecture

• Development services related to MLS or OpenMLS

• Contract research for your most cutting-edge problems

• Custom solutions for your specific security needs