The Monad Client is Now Open Source

The Monad Foundation has officially open-sourced its full client—both the consensus layer (monad-bft) and execution layer (monad)—under the GPL-3.0 license. This move invites developers to explore, contribute to, and build on Monad’s core infrastructure.

Key Highlights

Full Client Access: Developers now have open access to Monad’s consensus and execution components.
GPL-3.0 License: Encourages transparency, collaboration, and community-driven innovation.

Why It Matters?

Startups can now fork the Monad execution client to build custom runtimes tailored to specific use cases. The typical examples could be a high-frequency trading engine with specialized execution logic or a fully on-chain game with unique performance requirements.